Hempcrete 101, for Novice & Expert alike! One of the Best explanations of how what and especially why Hempcrete?, by one of the most generous people I've encountered in the Hempcrete space. Anthony nails it! If you're a Hempster or hempcrete builder and want to see how you explain the Hempcrete system, watch this video first.
I work an industrial hemp farm in eastern colorado. It's an amazing crop that ignorant people have condemned for no reason way to long. Fuel, medical, cattle feed, building material, plastics, way to many industries to mention.
Yo!! C'est Anthony!!! He has the most organized and zen construction site I have had the pleasure of working at. Hands down the best work ethics! Hemp homes baby! It's worth the exposure its getting now. Bravo Anthony!
Southern Cross University in Australia identified hemp as an ideal 'mop crop' that consumes sewage. And then you can build with it like this! Perfect for living in isolated places where you don't want to pollute the water table and ship in materials. I like it. Great video.
Hemp Bill was just signed into law in the US, which will enhance our use and education with applying this sacred, truly natural material. Awesome vid, thanks for creating it and spreading the HEMP love!
Awesome video EA, I actually worked for Anthony myself too, and on that very house. Anthony really knows his stuff, and is crazy busy. Its really good news for the planet that we have smart moral people doing such good work. I hope you get some well deserved rest this off season Anthony!
Thanks Mike! That's really great that you got to work with Anthony, I'm sure you learned a lot in the process. It's such a fascinating building technique!
Very true... What do you think about using Compressed Earth Blocks? Our org wants to use CEB for urban redevelopment because it's "everything" resistant and readily available. They can also be made from recycled concrete waste.
@@DavidKirtley hemp produces 4x the amount of resources and at a far faster rate than trees(wood products) do. Hemp heals the soil and would create a better biome for trees and everything around it. Better than cotton(no pesticides), better than wood(faster regeneration), better than petroleum (heals soil instead of deplete it). But your opinion is right 😂 preach on lol
@@abundantearthglobalcdc4290 I like them on a lot of levels. Yes, you can use recycled concrete waste but that is going to take machinery to process. The biggest problem you will have with any alternative construction in an urban environment will be getting things approved.
fantastic. i have been telling people that for so long that hemp, bamboo and other natural, fast growing materials could easily be used to take over all the production of goods made from out precious finite natural resources like natural gas, oil, and petroleum products.
*Wonderful material, which is much better* for the indoor air, than plastic insulation. Would be much faster, if they were building with pre-cast panels that they connect with wet layers.
@Deimos Cain You just can't compare Air crete with hempcrete. Hemp production is carbon neutral and using only lime makes environmental frendly and sustainable. Air crete is better than ordinary Portland cement but not as good and definitely not better then hempcrete.
Hempcrete is amazing, I'm learning more and more about it. Do you only use it in between wood panel, for insulation or do you actually use it a the finishing layer on the wall, to be seen as well?
Thanks so much, I'm happy you're finding good information in our videos :)
5 лет назад+3
so many interesting ideas, good explanations, clever advice for us who are interested in better alternatives in just one video. my father was born and lived until 16 in a house with wooden support, walls made of hemp, dry straws, clay and lime. it was a beautiful house. but as Anthony said, as long as the good roof is above, this house will stay. wish you all the best.
how can you not love this guy! great work. I really hope this has all the advantages that you mention and I can't wait to build something out of this or a similar alternative!
Thank you for the video. I have been waiting for a video that explains hempcrete without the hippie fluff. This is a legitimate building material that should be an option for everyone. Its very healthy and is a great option for many homes. Also look up myclium insulation.
I so agree! Here in Australia it's 'legal' but you either have to purchase it thru a licensed company (and it costs the earth) or, in some areas, you can get a permit to grow it but $$$ and you have to get your crop regularly inspected which YOU have to pay for! 🙄
In 1941 Henry Ford made a prototype car made from hemp plastic that was super strong - lighter but stronger than steel, and used instead of metal for the body of the car. It was also made to run on hemp fuel.
It doesn't. You must use concrete foundation as usual. But you can plaster any concrete left showing above ground to match. This product may bring back the plasterers trade but it's super labor intensive and still need carpenters to frame inside walls, roof and floor systems. Only the wealthy will be able to afford this type of building.
Thank you very much. I have watched 10s of videos to find out what you explained very well ans simply. How ever, I'm not convinced that there isn't a way to make a form hemp house in a conventional way instead of blocks. That's the challenge. Thank you again.
A company I worked for many years ago done the very same thing as this here in the UK in Haverhill Suffolk ,the process was monitored every step and it was considerably more expensive than conventional build ,as far as I’m aware the houses are still standing they were built for a housing association ,the experiment was to prove they could be built in adverse weather ( the middle of winter and be built buy unskilled labour ) we weren’t but tradesmen unwilling to piss about with it to be honest but they were built and the future tenants were offered an incentive to move into them so the council could monitor the environmental impact . I did learn quite a bit from this project mostly the properties of lime
Great inside look here, thanks to all parties involved. I see the Hempbassadors involved with this project a bit too, I figured they might be. Hemp is awesome and government is not.
Great video and Amazing Product. I was wondering what happens to the hemp walls if it gets wet or is in a flood situation. Do they dissolve? and What about Bush fires as well?
In situation of flood the wall will stand. Lime based mortar don't dissolve in water, they are back to stone once set. After the flood, the wall will dry out because it is breathable, only the esthetic will be affected. That said, hempcrete cannot stay wet or it will deteriorate. Might sound crazy but yes, hempcrete resists fire.
@@zachp7603 I think that is why it is recommended to build the foundation wall up to 18-24" for this type of construction, to prevent long exposure to water. If the site is positioned appropriately (high enough with a pitch that will drain water efficiently) and the overhang of the roof is sufficient and maintained, this construction can live well beyond 1000 years. THAT'S sustainability!
I am brought up in such a way that when you only hear the positives and nothing of the negatives, then this could either be a sales pitch or a propaganda. Word of advice to Exploring Alternatives. Share with the viewers genuine negatives of this construction material. Every material has its limitation. Discuss these to make this rather interesting video even more balanced...
It says in the video and the description that the hempcrete in not load bearing. That's the negative! Timber stud work is the main load bearer in this system, with the hempcrete packed around it.
This channel isn't bound by journalistic practices. Watch it, learn from it, and do your own research. Don't put such a burden on something that is essentially free entertainment.
Thanks for your comment, that's a good point you're making. We usually try our best to get a good balance of pros and cons in our videos but it's not always easy. Sometimes people are very excited and positive about what they do and it's hard to get the challenges out of them :) I think the main drawbacks that he mentioned in the video are drying time and higher cost of construction do to labour time. Thanks for checking out the video and happy holidays :)
You are doing a great job! Wow so inspirational! I am a contractor out of California and would love to build with hemp. Thanks for the video so amazing.
Is it possible to make large panels and cut to fit in between studs and joists and also to face both surfaces? Use pins or dowels to secure to each other, then face with plaster. Much better quality control for product would be possible. Build times would be greatly decreased. Also would fall more in line to skill set of current builders.
Good video. I'm a big fan of hempcrete construction. A few notes: 1. We learnt on my course that hemplime is safe for workers IF you use gloves and a mask, because lime is caustic. 2. I reckon it actually can be structural, it just hasn't been tested enough yet. Here at CAT in midwales where I study, the architecture tutors and students did an experiment where they built a free standing hemp-lime vault. It withstood slow load testing. I'm sure before too long there will be 100% hemp-lime structures. The formwork can be reused over and over. The hemp lime bricks are also a great idea. Could you build a house with only hemp-lime bricks and no timber frame, except for the roof?
I've helped build & renovate several friends homes with hemp & beer bottles. We do some work then we consume some hemp & some beer. Then we go back to work. That's how it's done in Australia.
In order to fight climate change we also need to fight inequality. Everyone should be able to afford a house. So I am a bit sceptical about this as a solution for this sector of the problem. That said, I do think it is part of the solution. It looks very promising and I will keep this in mind for when I start looking for a place to live in the near future. I think this is definitely worth pursuing and hopefully new techniques get discovered that make it cheaper to work with 😊
Damn r20 on the walls? One of my coworkers accidentally used r30 ceiling insulation on the walls and it drastically reduced sound transfer. I can't imagine how quiet these hemp walls are. Amazing
HaphazardP I'm English so I love sarcasm, some say it's the lowest form of wit but that's only because they have no sense of humour and lower intelligence. Lol 🇬🇧
....um you do realize that hemp was one of the mainstay crops back in washingtons time? and that it was used for many different things? and we also have much better technology now to turn the hemp into many different things that can take the place of pretty much all the things we make from natural resources (natural gas, oil, petroleum, etc. etc.) the world would be a much better and different place if the US and other countries weren't like "omg these people that dont look like me are getting high and getting the people who look like me high and its offensive and since i am racist, i must put an end to everything they use." then i imagine we would be using a whole lot less of the finite natural resources we have been scourging from the planet. although i am not quite sure what sort of sarcasm you are intending, i wan't to state this for those who think you mean that since hemp has been around that long that it is then therefore useless because the world is not a different place.
Having a binge on hemp documentaries today. Just been watching about hemp seed oil as fuel. Hemp biodiesel is a more efficient fuel than diesel, plus runs in an unmodified diesel engine. I'm a building inspector and have seen a house made from hempcrete. Anyway I'm waffling.. Fascinating. Oh and British here too, LOL at the sarcasm comments 😅
I've wanted to build a house from shipping containers for years. I believe hempcrete is the ideal material for the framed out spaces between my containers and the perfect external insulation for the containers themselves. Has anyone considered making SIPS with hempcrete in the middle of the plywood panels instead of styrofoam?
Gene Jordan hemp-crete would be very heavy with thickness needed to have good R value. Maybe they could just use packed hemp without the concrete added, not sure what R value hemp alone would have?
@@longhairmullet You are correct. I had mis-typed that. Packed hemp would work as an insulation. Perhaps Hempcrete would work for the base of the framed out walls between the containers? However, the thermal mass stored in a wall of Hempcrete facing the sun might prove useful in the winter.
No comment on the use of anhydrous lime? That's a huge component of cement and concrete which, the production of which, is a a huge CO2 emitter. Hemp is great, but I think other binders like clay or other non-CO2 emitting materials would be better. Hemp as a fiber source should have been more mainstream decades ago.
yea i thought someone in a different video used non-hydraulic lime which can absorb some, most, or all of the CO2 freed during production (firing in a kiln), apparently depending on how hydraulic/non-hydraulic the lime happens to be.
@@scheideggerUSVI I meant in terms of making it more eco-friendly. Why not just have a traditional wooden house with 12 inches of cellulose insulation and skip the lime?
The natural hydraulic lime used in hempcrete production is not subjected to nearly as high of a temperature in the kiln as typical concrete mixes. Although there is some co2 produced in that process, once combined with the hemp hurds, hempcrete is truly carbon negative. The lime as it vitrifies over time will actually re-absorb a portion of the carbon driven off in the firing process.
Hello . I have watched 100s of videos to find out what you explained very well and straight to the point .Do you have a clue how many tons of hempcrete does it take to build a 70 square meters house with a thickness of 14inch wall? Thank you very much!
I haven't seen anything here that suggests it cannot be done with other material. Essentially it is just an organic version of concrete madd with fiberglass. The many strands inside do strengthen. The product and possibly insulate. So while hemp could be the best option, it is not unique in this. Fiberglass reinforced concrete is already a thing.
Well, hemp hurds have special characteristics, such as open porosity and capillary action, that have a lot to do with hempcrete's performance. It allows the migration of vapor, but also phase transitions : when the humidity evaporates in summer, it cools the wall, if vapor condensates in winter, it warms the wall. It has also a low thermal effusivity and feels warm compared to a masonry wall, allowing to lower the temperature of the air with the same level of comfort. Now, it doesn't mean hemp hurds are the only vegetal material with these properties, it just happens to have been used and studied since the 80's. It was first used to replace the wattle and daub for the restoration of old half timber houses. It was chosen because it was a cheap by-products of hemp fiber production, and more readily available than straw. But there are now experiments being made with Miscanthus (silvergrass), sun flower stems, and lavender stems (a by-products of the production of essential oils). Hempcrete, however, benefits from 40 years of hindsight, and has, in France, been tested by the "scientific and technical center of construction" with regulations and trainings for the professionals. So you can get the 10 years warranty from the contactor that conditions subventions for efficiency improvement, for example. It's even recommended by local authorities, especially in old houses restoration.
this haw all the residential and buildings only should be built.hemp is truly superior building yet even more useful material.Eventually humanity will start using the green technology’s more often cause it healthy and efficient.
I've never met any hemp that was fire resistant. I've heard it said before"Over grow the government". An interesting statement. We all cry for a government to make a plant legal that should never 've been made illegal.Get together people that's all it would take. Overgrow the government.
Sometimes all you have to do is explain to the government that there is a better way to build and if the try to stone wall you , all you have to do, is show them with your votes, that usually gets there attention.😁💙
I am very interested to use this method in my house, but R2 at 25mm seems amazingly high, do you have a document. I would like to propose it to my employer, as i am a rénovateur myself. Many thanks in advance..
Great that some people still promote hemp as building material. From time to time I check YT for new videos on this topic but not a lot new material is coming out.
but it isn't a concrete subsitute... it has no compression strength and very little tensile strength. it is basically a fiberglass insulation and gypsum board in one step product...
Nice idea, they only don't tell that the insulation ratio is a lot lower than other materials. R2.1 isn't much for that thickness at all. Not to say it's totally bad, but it is something to keep in mind. There are also very good insulation materials made from recycled waste. Less insulation can mean that you need to heat up more, which is in the end is also less sustainable. Ones again, it doesn't mean it's totally useless, but nothing comes for free.
Merlin Gallagher It is R2.1 per inch of thickness and the most common thickness of the hemp layer is 12" so the R value of the hemp wall is R25 as is stated in this video.The best things about hemp are non-toxic to the builders and to the people who live or work in the finished bldg, the material breathes so no problems with humidity, damp, mouldin the finished home; lightweight and easy to work with so non-skilled labour including the eventual owners of the house can be part of the building crew which cuts down on costs and increases sense of ownership and care and understanding of the end product; the beauty of the finished walls and whatever else was mentioned in this video and in many others on using hemp as a building material.
@@shardamatasatyam9148 Thanks for your reply. I am familiar with these materials for many years. Yet I don't always recommend it to people for the reasons I mentioned before. Besides a lot of hemp insulation products also contain "toxic" elements. Also there are a lot of other non-toxic products. In fact most of the products I am familiar with can be used by "non-skilled" workers with no or very little protection.
What Shardamata said. Seriously Merlin, if you watched the video half as carefully as you constructed your criticism, you would have save yourself the time.
@@godfatherNYC In fact, I watched the video a few times completely. But no thanks for giving some well meant advice, glad it's being appreciated so much
The labor cost is too high, and the R-value at 2.1 per inch is on the low side for an insulation material. Polyurethane Foam (foamed on site) has an R-value of 6.25 per inch. R-values for fiberglass rolled batt insulation are typically between 2.9 and 3.8 per inch. R-value of cork is 3.00 per inch. Hempcrete is also a misnomer since it has nothing to do with concrete. It's not made using concrete and isn't near as strong as concrete. Hemplime would be a more honest term. It's not strong enough to build a load-bearing wall from it without additional framing.
R Value is one point but is not the entire reason for using Hempcrete. Polyurethane is toxic for you to breathe overtime as it off-gases and your breathing toxic and proven cancer causing materials exposing your family to these elements for some is a non starter. Hempcrete breathes regulating humidity more or less depending on the environment. more in AZ less in FL. Hemp is sustainable synthetic building materials are harming the planet and us. Gypsum has to be mined, plastic for vapor barriers are filling our oceans. Hemp Lime walls are not load bearing and not the point. the way to look at it is Hemp Lime is "Hemp Insulation Installation" These walls also filter the air still, not like when the plant was alive but it does still sequester/Trap carbon from the atmosphere making the interior environment in that home compared to next door cleaner and less toxic. People refer to the sense in a Hemp House as Cozy, Cave like, Comfy, Peaceful. Not for everyone, but those other benefits especially environmental add up for certain segments of the population. A field of Hemp grows in 120 days, makes the same amount of pulp 4 acres of trees produce in one single acre. and filters the air while growing..
He mentions that one of the limiting factors is waiting for the hempcrete to cure ("dry" as he says) before building on top of it and removing formwork. I wonder if adding 10-15% clay would help to add an instant binder and increase thermal mass of the walls. This might change the R-value, which would need to be considered. However, technologies such as rammed earth allow you to create walls and immediately remove formwork, which could speed up the work.
It's very practical and easy, definitely more so than conventional building (less complicated, no vapor barrier,..setup is easier). Affordable..I don't know...
To learn more about Anthony's hempcrete work:
instagram.com/du.chanvre/
duchanvre.com/
No vapor barrier?? This sounds asinine.
@@KnightofAntiquity thx for proving the expression that "ignorance is bliss"
Pressing hempcrete too hard (like in the video) is counterproductive, less air barrier, more expensive material.
Would this be available for Uk
Hempcrete 101, for Novice & Expert alike! One of the Best explanations of how what and especially why Hempcrete?, by one of the most generous people I've encountered in the Hempcrete space. Anthony nails it! If you're a Hempster or hempcrete builder and want to see how you explain the Hempcrete system, watch this video first.
I work an industrial hemp farm in eastern colorado. It's an amazing crop that ignorant people have condemned for no reason way to long. Fuel, medical, cattle feed, building material, plastics, way to many industries to mention.
@frosty pablo springs right out side Carson... Got stationed here, got out, got stuck
They hiring?
@@hondaservicecenter sadly, the farm shut down during this plandemic.
Ryan Rich sorry to hear that I hope God has blessed you with other opportunities, keep fighting and stay strong
@@hondaservicecenter VA....👍
Yo!! C'est Anthony!!! He has the most organized and zen construction site I have had the pleasure of working at. Hands down the best work ethics! Hemp homes baby! It's worth the exposure its getting now. Bravo Anthony!
Seems like a chill guy. I'd work for him. He has lots of good ideas.
It's awesome. he is cheeky. il est comme peewee herman.
Southern Cross University in Australia identified hemp as an ideal 'mop crop' that consumes sewage. And then you can build with it like this! Perfect for living in isolated places where you don't want to pollute the water table and ship in materials. I like it. Great video.
Hemp Bill was just signed into law in the US, which will enhance our use and education with applying this sacred, truly natural material. Awesome vid, thanks for creating it and spreading the HEMP love!
That's great news, yeah I just saw that yesterday as we were posting the video! Thanks for checking out the video :)
That's nice of the overlords to give us permission to use a plant.
@@sleddy01 lol I guess the market for nylon must be in decline
And they are fire retardant
Thank your president
Awesome video EA, I actually worked for Anthony myself too, and on that very house. Anthony really knows his stuff, and is crazy busy. Its really good news for the planet that we have smart moral people doing such good work. I hope you get some well deserved rest this off season Anthony!
Thanks Mike! That's really great that you got to work with Anthony, I'm sure you learned a lot in the process. It's such a fascinating building technique!
Where was this home built?
Can U Hook Me Up with them to buid Our Home? I will pay well if so!!!
This is great stuff... we can adapt this building model in Africa. And also we can grow the hemp for you👌👌
Bro started and u will be a hero to many people.
yea go ahead. will buy!
I love the support. This is exactly what I need to get started.✊🏾✊🏾
That’s awesome
keep us updated !
One of the greatest Hempcrete videos available on RUclips🌱
Wow!!! This is so fascinating! Who would have thought something like this even existed?! Absolutely love this idea! ❤❤👏
Legalization of hemp worldwide,save the forests save the planet
Until they start cutting down forests to plant hemp...
Very true... What do you think about using Compressed Earth Blocks? Our org wants to use CEB for urban redevelopment because it's "everything" resistant and readily available. They can also be made from recycled concrete waste.
Anything that's better for the planet and can reduce homelessness
@@DavidKirtley hemp produces 4x the amount of resources and at a far faster rate than trees(wood products) do. Hemp heals the soil and would create a better biome for trees and everything around it. Better than cotton(no pesticides), better than wood(faster regeneration), better than petroleum (heals soil instead of deplete it). But your opinion is right 😂 preach on lol
@@abundantearthglobalcdc4290 I like them on a lot of levels. Yes, you can use recycled concrete waste but that is going to take machinery to process. The biggest problem you will have with any alternative construction in an urban environment will be getting things approved.
fantastic. i have been telling people that for so long that hemp, bamboo and other natural, fast growing materials could easily be used to take over all the production of goods made from out precious finite natural resources like natural gas, oil, and petroleum products.
I can't wait to see how far hemp comes along in the next ten years. I'd love to have better insulation in my walls.
*Wonderful material, which is much better* for the indoor air, than plastic insulation.
Would be much faster, if they were building with pre-cast panels that they connect with wet layers.
The "fiberglass" you are thinking of is spun glass fibers set in resin. Insulation is only the spun glass. It's glass. Glass is made of sand.
I like how the hempcrete is being pressed into every nook and cranny as they move the forms higher.
@Deimos Cain your dreaming Demos , that stuff is better than other stuff but can not beat Hempcrete on pure functionality !!!
Start doing factory prefab hempcrete walls like Amaco does in Switzerland
@Deimos Cain You just can't compare Air crete with hempcrete. Hemp production is carbon neutral and using only lime makes environmental frendly and sustainable. Air crete is better than ordinary Portland cement but not as good and definitely not better then hempcrete.
@@velimircuvrk1640 is not the hemp itself carbon negative? Would love to see the economics of it, including the climate accounting.
LOVED I HOPE THE WHOLE WORLD USED THIS SYSTEM .
I would love to see all houses built this way 👍
Would be awesome if we could buy it in 4x8 sheets. Now that’s an idea for entrepreneurs.
Fibers of hemp, pressed into sheets, replace fiberboard, cheaper than plywood’s.
On it allready. I invite you to try and beat me to it. Competition breeds innovation.
@@musFuzZ where you at with this?
Hempcrete is amazing, I'm learning more and more about it. Do you only use it in between wood panel, for insulation or do you actually use it a the finishing layer on the wall, to be seen as well?
I heard about hempcrete very recently. And its so nice to find a video that introduces the material so well. Thanks a lot!
I like to see and learn of new construction techniques! Love your videos!
Thanks so much, I'm happy you're finding good information in our videos :)
so many interesting ideas, good explanations, clever advice for us who are interested in better alternatives in just one video.
my father was born and lived until 16 in a house with wooden support, walls made of hemp, dry straws, clay and lime. it was a beautiful house. but as Anthony said, as long as the good roof is above, this house will stay. wish you all the best.
awesome stuff!
Man this guy is so chill he really reminds me of Christoph Waltz, anyone?
how can you not love this guy! great work. I really hope this has all the advantages that you mention and I can't wait to build something out of this or a similar alternative!
Grow your own house that composts when you're done with it and looks like it could be DIY. I like it, highly sustainable.
Thank you for the video. I have been waiting for a video that explains hempcrete without the hippie fluff. This is a legitimate building material that should be an option for everyone. Its very healthy and is a great option for many homes. Also look up myclium insulation.
I so agree! Here in Australia it's 'legal' but you either have to purchase it thru a licensed company (and it costs the earth) or, in some areas, you can get a permit to grow it but $$$ and you have to get your crop regularly inspected which YOU have to pay for! 🙄
Exceptionally thought provoking.
A smart presentation as well!
In 1941 Henry Ford made a prototype car made from hemp plastic that was super strong - lighter but stronger than steel, and used instead of metal for the body of the car. It was also made to run on hemp fuel.
Fascinating building material and technique, I'm curious though about how this withstands saturation at ground level where snow pile up can occur.
It doesn't. You must use concrete foundation as usual. But you can plaster any concrete left showing above ground to match. This product may bring back the plasterers trade but it's super labor intensive and still need carpenters to frame inside walls, roof and floor systems. Only the wealthy will be able to afford this type of building.
Thank you very much. I have watched 10s of videos to find out what you explained very well ans simply. How ever, I'm not convinced that there isn't a way to make a form hemp house in a conventional way instead of blocks. That's the challenge. Thank you again.
Excuse my French but Hempcrete is fucking awesome !!! Thanks so much for making this video - truly inspiring.
A company I worked for many years ago done the very same thing as this here in the UK in Haverhill Suffolk ,the process was monitored every step and it was considerably more expensive than conventional build ,as far as I’m aware the houses are still standing they were built for a housing association ,the experiment was to prove they could be built in adverse weather ( the middle of winter and be built buy unskilled labour ) we weren’t but tradesmen unwilling to piss about with it to be honest but they were built and the future tenants were offered an incentive to move into them so the council could monitor the environmental impact . I did learn quite a bit from this project mostly the properties of lime
Great inside look here, thanks to all parties involved. I see the Hempbassadors involved with this project a bit too, I figured they might be. Hemp is awesome and government is not.
What a wonderful product& it looks very natural and attractive. Hemp farming might be a good biz to get into. I love natural resources like this.
Great video and Amazing Product. I was wondering what happens to the hemp walls if it gets wet or is in a flood situation. Do they dissolve? and What about Bush fires as well?
the description states that hemp building materials "resists fire, mould..." however I'm interested in more details as well.
In situation of flood the wall will stand. Lime based mortar don't dissolve in water, they are back to stone once set. After the flood, the wall will dry out because it is breathable, only the esthetic will be affected. That said, hempcrete cannot stay wet or it will deteriorate. Might sound crazy but yes, hempcrete resists fire.
Fire tests are incredible. It displaces heat like Kevlar.
It's like a sand castle, it'll fall into itself. I can imagine even heavy rain for a long period can cause massive damage.
@@zachp7603 I think that is why it is recommended to build the foundation wall up to 18-24" for this type of construction, to prevent long exposure to water. If the site is positioned appropriately (high enough with a pitch that will drain water efficiently) and the overhang of the roof is sufficient and maintained, this construction can live well beyond 1000 years. THAT'S sustainability!
I would love to see more hempcrete in the future
This is just the information I was looking for so thank you for posting.
Awesome videos, I just learned you could build a house with hempcrete😯. Thank you so much for sharing.
I am brought up in such a way that when you only hear the positives and nothing of the negatives, then this could either be a sales pitch or a propaganda. Word of advice to Exploring Alternatives. Share with the viewers genuine negatives of this construction material. Every material has its limitation. Discuss these to make this rather interesting video even more balanced...
It says in the video and the description that the hempcrete in not load bearing. That's the negative! Timber stud work is the main load bearer in this system, with the hempcrete packed around it.
This channel isn't bound by journalistic practices. Watch it, learn from it, and do your own research. Don't put such a burden on something that is essentially free entertainment.
@@scottperezfox it isn't entertainment for me, but more educational. That's what I like about it.
Thanks for your comment, that's a good point you're making. We usually try our best to get a good balance of pros and cons in our videos but it's not always easy. Sometimes people are very excited and positive about what they do and it's hard to get the challenges out of them :) I think the main drawbacks that he mentioned in the video are drying time and higher cost of construction do to labour time. Thanks for checking out the video and happy holidays :)
@@ExploringAlternatives thanks for your kind and considered reply. Here's wishing you a happy Christmas.
Wow...once I decide to buy or build a house I will definitely consider this as an option.
You are doing a great job! Wow so inspirational! I am a contractor out of California and would love to build with hemp. Thanks for the video so amazing.
interlocking brick shapes would be wonders for everyone!! absolutely great product ✌👊🏻
The 170 dislikes are from people that think hemp is that supposed “dangerous drug, marijuana “ .
Not even marijuana is a drug lol
@@donttrip952 it is a drug but those are the same people that smoke cigarettes and drink alcohol that want it suppressed for "danger"
@@lucariobtuse395
Itvis a drug according to who.. You or wat... I no u dont talk for me
@@donttrip952 marijuana is a good drug much like coffee. It is by definition a drug.
@@lucariobtuse395
I dont call it a drug tho that doesnt apply to me
I love it! How well does it withstand getting flooded and how tuff is it to repair in such soaked situations? Thx
Another video already! Suuuper interesting, thanks!!
Thanks so much Phil! Yeah we thought that was REALLY cool too :)
To move forward we have to look back. This is the truth of sustainability, we have so many answers in our past.
Is it possible to make large panels and cut to fit in between studs and joists and also to face both surfaces? Use pins or dowels to secure to each other, then face with plaster. Much better quality control for product would be possible. Build times would be greatly decreased. Also would fall more in line to skill set of current builders.
Good video. I'm a big fan of hempcrete construction. A few notes: 1. We learnt on my course that hemplime is safe for workers IF you use gloves and a mask, because lime is caustic. 2. I reckon it actually can be structural, it just hasn't been tested enough yet. Here at CAT in midwales where I study, the architecture tutors and students did an experiment where they built a free standing hemp-lime vault. It withstood slow load testing. I'm sure before too long there will be 100% hemp-lime structures. The formwork can be reused over and over. The hemp lime bricks are also a great idea. Could you build a house with only hemp-lime bricks and no timber frame, except for the roof?
He says Hempcrete is cheaper than conventional building when you provide the labor. It’s more expensive when you have to pay for the labor.
If the price was better the use of similar materials would "explode". I´m rooting for everyone who builds with hemp or similar materials :)
Hemp blocks... Genius
not just the future but the past as well. hemp was so valuable in america it was featured on the back of the 10 dollar bill.
I wonder how hard it is to get building permits to get a hempcrete house built I'm thinking in Utah USA
Those hemp hurds look like they would make a great soil amendment.
Team hemp. ❤️👑❤️
You have a New Subscriber!!
@@GrownandHealthy Thanks so much :) :)
Netta2 👏🏾
Well Done. Excellent production and documentary. Love the precision of your work !
Thanks so much John :) :)
There is still a lot of wood being used in this production. This material would be great to fortify Earthships!
@Steven Soco How so? how do you compare them to conventional buildings & come to that conclusion?
Its so great, not even the US will use it cause its so effective.
That is so awesome. When you use hemp bricks, what do you use to bind them together?
Farhad Kazemi hemp mortar.
@@reviewedsnail6086 -How do you make that?
Nonhydraulic lime
@@pakngah1134 , what does non hydraulic mean?
I've helped build & renovate several friends homes with hemp & beer bottles. We do some work then we consume some hemp & some beer. Then we go back to work. That's how it's done in Australia.
Great video on one my favorite building material! Maybe you guys can also do a video on "rammed earth" it's another eco friendly way of building.
Hell yeah. Liked and subbed. We need more builders like this.
Hemp was used in everything just like plastic today up until the 80's
Why did they stop? Does anyone know? I would like to know.
@@alanthompson4912 Hemp was thrown in with marijuana so the textile paper companies could rule supreme.
@@CoryRayGordonMusic did not know that, thank you, I was wondering why it seem to disappear from history without any explanation why😁💙
In order to fight climate change we also need to fight inequality. Everyone should be able to afford a house. So I am a bit sceptical about this as a solution for this sector of the problem.
That said, I do think it is part of the solution. It looks very promising and I will keep this in mind for when I start looking for a place to live in the near future. I think this is definitely worth pursuing and hopefully new techniques get discovered that make it cheaper to work with 😊
I enjoy the rich content .you guys rock
Thanks so much Chris! :) :)
@@ExploringAlternatives 😁
Damn r20 on the walls? One of my coworkers accidentally used r30 ceiling insulation on the walls and it drastically reduced sound transfer. I can't imagine how quiet these hemp walls are. Amazing
If only hemp were around 100 years ago, the world would be a different place. (sarcasm intended)
HaphazardP I'm English so I love sarcasm, some say it's the lowest form of wit but that's only because they have no sense of humour and lower intelligence. Lol 🇬🇧
....um you do realize that hemp was one of the mainstay crops back in washingtons time? and that it was used for many different things? and we also have much better technology now to turn the hemp into many different things that can take the place of pretty much all the things we make from natural resources (natural gas, oil, petroleum, etc. etc.) the world would be a much better and different place if the US and other countries weren't like "omg these people that dont look like me are getting high and getting the people who look like me high and its offensive and since i am racist, i must put an end to everything they use." then i imagine we would be using a whole lot less of the finite natural resources we have been scourging from the planet.
although i am not quite sure what sort of sarcasm you are intending, i wan't to state this for those who think you mean that since hemp has been around that long that it is then therefore useless because the world is not a different place.
HaphazardP Do you see what I mean about sarcasm only available to some?
Bethany Day Yes Bethany we do know about hemp thus the comment sarcasm intended.
Having a binge on hemp documentaries today. Just been watching about hemp seed oil as fuel. Hemp biodiesel is a more efficient fuel than diesel, plus runs in an unmodified diesel engine.
I'm a building inspector and have seen a house made from hempcrete.
Anyway I'm waffling.. Fascinating.
Oh and British here too, LOL at the sarcasm comments 😅
HI Anthony, Thank you so much for sharing with us this dream, you are a sweet man.
I've wanted to build a house from shipping containers for years. I believe hempcrete is the ideal material for the framed out spaces between my containers and the perfect external insulation for the containers themselves. Has anyone considered making SIPS with hempcrete in the middle of the plywood panels instead of styrofoam?
Gene Jordan hemp-crete would be very heavy with thickness needed to have good R value. Maybe they could just use packed hemp without the concrete added, not sure what R value hemp alone would have?
@@longhairmullet You are correct. I had mis-typed that. Packed hemp would work as an insulation. Perhaps Hempcrete would work for the base of the framed out walls between the containers? However, the thermal mass stored in a wall of Hempcrete facing the sun might prove useful in the winter.
I'm thinking along the same lines
wow the guy is such a maestro in making loved this and the links!
No comment on the use of anhydrous lime? That's a huge component of cement and concrete which, the production of which, is a a huge CO2 emitter. Hemp is great, but I think other binders like clay or other non-CO2 emitting materials would be better. Hemp as a fiber source should have been more mainstream decades ago.
yea i thought someone in a different video used non-hydraulic lime which can absorb some, most, or all of the CO2 freed during production (firing in a kiln), apparently depending on how hydraulic/non-hydraulic the lime happens to be.
Why not just make the house out of wood?
@@g.e.o.r.g.e... pay attention george the house is, this is semi-rigid insulation
@@scheideggerUSVI I meant in terms of making it more eco-friendly. Why not just have a traditional wooden house with 12 inches of cellulose insulation and skip the lime?
The natural hydraulic lime used in hempcrete production is not subjected to nearly as high of a temperature in the kiln as typical concrete mixes. Although there is some co2 produced in that process, once combined with the hemp hurds, hempcrete is truly carbon negative. The lime as it vitrifies over time will actually re-absorb a portion of the carbon driven off in the firing process.
Hello . I have watched 100s of videos to find out what you explained very well and straight to the point .Do you have a clue how many tons of hempcrete does it take to build a 70 square meters house with a thickness of 14inch wall? Thank you very much!
Nice video, very informative. Question: Could the same process be done with any other material or is there something very special about hemp?
I haven't seen anything here that suggests it cannot be done with other material. Essentially it is just an organic version of concrete madd with fiberglass. The many strands inside do strengthen. The product and possibly insulate.
So while hemp could be the best option, it is not unique in this. Fiberglass reinforced concrete is already a thing.
Well, hemp hurds have special characteristics, such as open porosity and capillary action, that have a lot to do with hempcrete's performance. It allows the migration of vapor, but also phase transitions : when the humidity evaporates in summer, it cools the wall, if vapor condensates in winter, it warms the wall. It has also a low thermal effusivity and feels warm compared to a masonry wall, allowing to lower the temperature of the air with the same level of comfort.
Now, it doesn't mean hemp hurds are the only vegetal material with these properties, it just happens to have been used and studied since the 80's.
It was first used to replace the wattle and daub for the restoration of old half timber houses. It was chosen because it was a cheap by-products of hemp fiber production, and more readily available than straw. But there are now experiments being made with Miscanthus (silvergrass), sun flower stems, and lavender stems (a by-products of the production of essential oils).
Hempcrete, however, benefits from 40 years of hindsight, and has, in France, been tested by the "scientific and technical center of construction" with regulations and trainings for the professionals. So you can get the 10 years warranty from the contactor that conditions subventions for efficiency improvement, for example. It's even recommended by local authorities, especially in old houses restoration.
this haw all the residential and buildings only should be built.hemp is truly superior building yet even more useful material.Eventually humanity will start using the green technology’s more often cause it healthy and efficient.
I've never met any hemp that was fire resistant.
I've heard it said before"Over grow the government".
An interesting statement.
We all cry for a government to make a plant legal that should never 've been made illegal.Get together people that's all it would take.
Overgrow the government.
Sometimes all you have to do is explain to the government that there is a better way to build and if the try to stone wall you , all you have to do, is show them with your votes, that usually gets there attention.😁💙
You are so on the money with this product, we need this thinking eta!
"Haha. We have to think of the workers, *sometimes"
His statement on hempcrete as a form of carbon capture is very eye popping.
Very Interesting.
Jute Coconuts. Banana Aloeshrub Reed. Straw add clay all abundantly available also renewable. UNDP should take this project to fulfill house for all.
At R2 per inch, this should be an entirely viable building material for most construction projects.
I am very interested to use this method in my house, but R2 at 25mm seems amazingly high, do you have a document. I would like to propose it to my employer, as i am a rénovateur myself. Many thanks in advance..
Exactly! Thanks for making this video 🙏👍❤
Love it, very inspiring!
Great that some people still promote hemp as building material. From time to time I check YT for new videos on this topic but not a lot new material is coming out.
In term of ecology, this methods is far better than concrete.
but it isn't a concrete subsitute... it has no compression strength and very little tensile strength. it is basically a fiberglass insulation and gypsum board in one step product...
Yeah except the r value sucks.
This is an exciting alternative. Will definitely incorporate into my next built
This seems like something that could possibly work with 3D printing. It's been done with concrete.
Since the framing seems to be built typically out of wood,
does it really save on lumber?
is it just the exterior plywood that is no longer needed?
“2 Hempcrete Masons can build a typical house in two weeks.” 5:00
This just changed my life
Nice idea, they only don't tell that the insulation ratio is a lot lower than other materials. R2.1 isn't much for that thickness at all.
Not to say it's totally bad, but it is something to keep in mind. There are also very good insulation materials made from recycled waste.
Less insulation can mean that you need to heat up more, which is in the end is also less sustainable.
Ones again, it doesn't mean it's totally useless, but nothing comes for free.
Merlin Gallagher It is R2.1 per inch of thickness and the most common thickness of the hemp layer is 12" so the R value of the hemp wall is R25 as is stated in this video.The best things about hemp are non-toxic to the builders and to the people who live or work in the finished bldg, the material breathes so no problems with humidity, damp, mouldin the finished home; lightweight and easy to work with so non-skilled labour including the eventual owners of the house can be part of the building crew which cuts down on costs and increases sense of ownership and care and understanding of the end product; the beauty of the finished walls and whatever else was mentioned in this video and in many others on using hemp as a building material.
@@shardamatasatyam9148 Thanks for your reply. I am familiar with these materials for many years. Yet I don't always recommend it to people for the reasons I mentioned before.
Besides a lot of hemp insulation products also contain "toxic" elements.
Also there are a lot of other non-toxic products. In fact most of the products I am familiar with can be used by "non-skilled" workers with no or very little protection.
What Shardamata said. Seriously Merlin, if you watched the video half as carefully as you constructed your criticism, you would have save yourself the time.
@@godfatherNYC In fact, I watched the video a few times completely.
But no thanks for giving some well meant advice, glad it's being appreciated so much
@@merlingallagher4484
Why don't you tell us what these materials are?
I'd 100% use hempcrete.
The labor cost is too high, and the R-value at 2.1 per inch is on the low side for an insulation material. Polyurethane Foam (foamed on site) has an R-value of 6.25 per inch. R-values for fiberglass rolled batt insulation are typically between 2.9 and 3.8 per inch. R-value of cork is 3.00 per inch.
Hempcrete is also a misnomer since it has nothing to do with concrete. It's not made using concrete and isn't near as strong as concrete. Hemplime would be a more honest term. It's not strong enough to build a load-bearing wall from it without additional framing.
What's the compressive strength of hemplime?
They are high now but if more people what it the price should come down!😎
@@tammyshea8882 that is correct, we currently are proving the supply chain we call it transitional at the moment, it's already come down in two years
R Value is one point but is not the entire reason for using Hempcrete. Polyurethane is toxic for you to breathe overtime as it off-gases and your breathing toxic and proven cancer causing materials exposing your family to these elements for some is a non starter. Hempcrete breathes regulating humidity more or less depending on the environment. more in AZ less in FL. Hemp is sustainable synthetic building materials are harming the planet and us. Gypsum has to be mined, plastic for vapor barriers are filling our oceans. Hemp Lime walls are not load bearing and not the point. the way to look at it is Hemp Lime is "Hemp Insulation Installation" These walls also filter the air still, not like when the plant was alive but it does still sequester/Trap carbon from the atmosphere making the interior environment in that home compared to next door cleaner and less toxic. People refer to the sense in a Hemp House as Cozy, Cave like, Comfy, Peaceful. Not for everyone, but those other benefits especially environmental add up for certain segments of the population. A field of Hemp grows in 120 days, makes the same amount of pulp 4 acres of trees produce in one single acre. and filters the air while growing..
Very nice video please have more of them thank youPlease have more videos like thisThank you have a nice day
and in really really hard times you can smoke your house.
@Fisher Theo it was a joke, but thank you for taking all the fun out of it .
He mentions that one of the limiting factors is waiting for the hempcrete to cure ("dry" as he says) before building on top of it and removing formwork. I wonder if adding 10-15% clay would help to add an instant binder and increase thermal mass of the walls. This might change the R-value, which would need to be considered. However, technologies such as rammed earth allow you to create walls and immediately remove formwork, which could speed up the work.
A true wonder plant that has so many uses.
I guess, its always 20-30% more expensive, when its "green"...senseless...
It will become cheaper once its used more commonly.
@@yourlocaltoad5102
At least we hope it does... 😀
@Ian McLean
Could be...but have you noticed that green energy too costs more than other types? Enough supply on that...and demand... 😊
Excellent video! We enjoyed it!
doesn't look practical and affordable to every day builders
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It's very practical and easy, definitely more so than conventional building (less complicated, no vapor barrier,..setup is easier).
Affordable..I don't know...
I like how he thinks about the workers too