Shiv, be it hemp or flax, is normally a waste produce. The hemp tow you showed was from scutching. Under ideal conditions hemp fibre can be over 4 meters long and flax up to 1 m. Yes, I'm very much into fiber craft.
I found that in my earthbag/cob slip house, having insulation on the outside and thermal mass on the inside keeps the temperature stable for very long periods of time, and with the insulation on the outside, that keeps outside temperatures from coming in and the cool air in because of the cool walls
would be helpful if u state how straw bale vs cob behave in summer & winter in terms of heat inside the building, coziness, and cooling in summer, too much heat etc.
Another way to look at it is that insulations makes it easier to maintain a temperature difference (hot I side, cold outside for instance) while thermal mass averages out temperature fluctuations (day night cycles). If the average temperature is 10 degrees hotter than the inside temperature, cooling will be difficult without insulation even with a lot of thermal mass.
can you use both ideas, two walls using a cob wall with a straw- wall with a cob covering for the inside wall. So the outside wall would be a one foot thick cob wall and a inside wall of state with a cob covering.
You can change the mixing ratio instead of that. Using both ideas means killing each ideas together. You are not gonna get nice thermal mass, because you blocked it with insulation. You can't really benefit insulation because you made half of the wall from thermal mass. It's not how you build the walls. Its deciding which wall needs thermal mass and with one needs insulation.
Great video-thank you! What kind of insulation is that on the table behind you in the house? I ask because I’m trying to figure out good insulation for ceiling/roofs and I wondered if you found a good solution for that.
A little off current topic (but any question you said) I'm planning a perimeter wall in either straw bales or earth bags What would advise for protection against heavy rain or the element in general lime plasta? Loving your channel.
@@he7is7at7hand cement has various additives that end up reducing airflow, it is not recommended for natural building, as it can lead to rot of fibrous materials.
It seems like in a place where it could be hot all night long a person would want insulation, and not thermal Mass for the walls. It would be better to have passive solar where the sun would shine on the thermal Mass Through the Windows and heated up in the winter time but in the summertime the sun wouldn't shine on it. So, make the walls with insulation of some sort and have passive solar. I think that's the answer for West Texas where I live.
Would you recomend thermal or fiber (straw slip in forms) in Chitwan Nepal. It's unbelievably hot in hot time and gets into the 40s during cold time. I'm thinking both. Rice straw heavy on outside of walls,glass bottle center,ziq zagging for strength for Inside the wall then Cobb heavy material on the interior side of wall. What say you? Also wall will be 18" wide 6' tall 15' long.
What did they build with there in the past before concrete? Also, please check out these two videos of mine on dual wall systems: ruclips.net/video/HP07HppympE/видео.html ruclips.net/video/c8t-TO1HuEI/видео.html
I would not advise using any plastic moisture barriers on either the outside or inside of any earthen or straw based wall system. They need to be vapor permeable.
In adding a lime to mud slip would there be any concerns with decomposition due to higher alkaline? I use lime to cold pastuerize straw for mushroom growing substrate. So I can see a benefit to it, just wondering if you have any knowledge on it.
I don't think there would be any problem like that. Agricultural lime is also different than building lime. Can't say that I know the exact difference though!
@@thiscobhouse That is what I was thinking hydrated lime what I use in mushrooms. I'm thinking since I've got water with lime already why not use it in the clay.
I may be homeless soon do you think building a double wall wattle with a straw packed enter core with cod inside and out would protect from the elements especially in winter say something 8×8 with a 4 foot back wall and 8 foot front wall so the tarp roof will be 45° something big enough for a bed and maybe a cob fireplace I've been thinking about this awhile now I know I run the risk of being run off for trespassing so it will be on government land but something that can be left behind with only losing a tarp if run off and rebuilt easily with a saw and very little cordage plus the things around you until I find a place suitable enough to build I'll use a hammock with a tarp cover to sleep and travel easily
Show the math... you can jaw about the materials for hours but if you don't do the calculations it's a big opinion experiment without a science basis... be an engineer... if you don't show the math comparisons using specific heat values and best layering choices, i.e. dual walls, then we know it's your dice roll... show the dual wall insulation math calculations... materials and time are way too dear to guess. Show your materials costs in the various build type evaluation table... Examples of Specific Heats (BTU/LB °F) materials: Paraffin wax 3260 Cork 2000 Water 4182 Wet mud 2512 Soil wet 1480 Soil dry 800 Wood 1500 Poly styrene 1400 Concrete 880 Brick 840 Slate 760 Perlite 387 Typical Heating BTUh Requirements Per Square Foot: Look at map, learn zone, calc BTUs. The table of required heating BTUs per square foot is based on the IECC climate zone map shown at url Source: IECC Climate Zone Map, U.S. Department of Energy (US DOE), retrieved 2018/06/21, original source: basc.pnnl.gov/images/iecc-climate-zone-map. Climate Zone 1 - 30-35 BTUs / sq. ft. Climate Zone 2 - 35-40 BTUs / sq. ft. Climate Zone 3 - 40-45 BTUs / sq. ft. Climate Zone 4 - 45-50 BTUs / sq. ft. Climate Zone 5 - 50-60 BTUs / sq. ft. (some sources cite 50-55 BTUs / sq.ft.) Climate Zone 6 - citation needed; popular heating zone maps for the U.S. do not follow the current DOE climate zone definitions that we accept here. Climate Zone 7 - ditto. A 1,000 square foot room requires 18,000 BTUs. A simple formula to determine your heating needs is: (desired temperature change) x (cubic feet of space) x .133 = BTUs needed per hour. Get split heat pump system quote. Make sure you add wood stove/fireplace for backup heat.
Then go watch an engineer or a scientist. This guy is just a builder sharing his experience and knowledge. He never claimed he is the genius scientific organic cob engineer...
@@douglaspohl1827 are you even listening? Cool, you did some math on stoves. This guy is just saying "2+2 is 4, you have to learn the rest". This is basic information. He is showing the Rabbit hole. The jump is up to you. Jump in, do the math Mr. Engineer. I would like to see them.
@@thiscobhouse Thanks for all you have contributed to me. This Guy sending shade obviously has" issues"😂. Where can I find how to build slip form's? Thanks for everything 😊🙏🌍
![Stromae, Pomme - “Ma Meilleure Ennemie” (from Arcane Season 2) [Official Visualizer]](http://i.ytimg.com/vi/1F3OGIFnW1k/mqdefault.jpg)
Shiv, be it hemp or flax, is normally a waste produce. The hemp tow you showed was from scutching. Under ideal conditions hemp fibre can be over 4 meters long and flax up to 1 m. Yes, I'm very much into fiber craft.
I found that in my earthbag/cob slip house, having insulation on the outside and thermal mass on the inside keeps the temperature stable for very long periods of time, and with the insulation on the outside, that keeps outside temperatures from coming in and the cool air in because of the cool walls
Cool.
How do the outside insulation and the inside thermal mass connect? Or are they separated?
would be helpful if u state how straw bale vs cob behave in summer & winter in terms of heat inside the building, coziness, and cooling in summer, too much heat etc.
Simple yet awesome video
Another way to look at it is that insulations makes it easier to maintain a temperature difference (hot I side, cold outside for instance) while thermal mass averages out temperature fluctuations (day night cycles). If the average temperature is 10 degrees hotter than the inside temperature, cooling will be difficult without insulation even with a lot of thermal mass.
Super informative. Thanks
can you use both ideas, two walls using a cob wall with a straw- wall with a cob covering for the inside wall.
So the outside wall would be a one foot thick cob wall and a inside wall of state with a cob covering.
You can change the mixing ratio instead of that.
Using both ideas means killing each ideas together. You are not gonna get nice thermal mass, because you blocked it with insulation. You can't really benefit insulation because you made half of the wall from thermal mass.
It's not how you build the walls. Its deciding which wall needs thermal mass and with one needs insulation.
Yes, please refer to this video I did recently on dual walls: ruclips.net/video/HP07HppympE/видео.html
Great video-thank you! What kind of insulation is that on the table behind you in the house? I ask because I’m trying to figure out good insulation for ceiling/roofs and I wondered if you found a good solution for that.
We used rice straw for our house.
A little off current topic (but any question you said) I'm planning a perimeter wall in either straw bales or earth bags What would advise for protection against heavy rain or the element in general lime plasta? Loving your channel.
Lime plaster. Raise it off the ground at least a foot with the stem wall foundation, and cover the top with a roof.
@@thiscobhouse, what's the difference between lime plaster and cement?
@@he7is7at7hand cement has various additives that end up reducing airflow, it is not recommended for natural building, as it can lead to rot of fibrous materials.
It seems like in a place where it could be hot all night long a person would want insulation, and not thermal Mass for the walls. It would be better to have passive solar where the sun would shine on the thermal Mass Through the Windows and heated up in the winter time but in the summertime the sun wouldn't shine on it. So, make the walls with insulation of some sort and have passive solar. I think that's the answer for West Texas where I live.
How about using bottles inside Cobb walls for insulation.
Would you recomend thermal or fiber (straw slip in forms) in Chitwan Nepal. It's unbelievably hot in hot time and gets into the 40s during cold time. I'm thinking both. Rice straw heavy on outside of walls,glass bottle center,ziq zagging for strength for Inside the wall then Cobb heavy material on the interior side of wall. What say you? Also wall will be 18" wide 6' tall 15' long.
Sooo supper hot climate with Monsoon and pretty cold in winter. No shade trees
I'm building on 2 rice/corn farm fields in Chitwan Nepal....Sooo hot. 🙏
What did they build with there in the past before concrete?
Also, please check out these two videos of mine on dual wall systems:
ruclips.net/video/HP07HppympE/видео.html
ruclips.net/video/c8t-TO1HuEI/видео.html
Have you used Tyvek outside and plastic inside as usual? Wether it's not required?
I would not advise using any plastic moisture barriers on either the outside or inside of any earthen or straw based wall system. They need to be vapor permeable.
@@thiscobhouse I see, sounds this type of houses are good in dry climate, right?
@@thiscobhouse tyvek IS permeable. google it.
In adding a lime to mud slip would there be any concerns with decomposition due to higher alkaline? I use lime to cold pastuerize straw for mushroom growing substrate. So I can see a benefit to it, just wondering if you have any knowledge on it.
I don't think there would be any problem like that. Agricultural lime is also different than building lime. Can't say that I know the exact difference though!
@@thiscobhouse That is what I was thinking hydrated lime what I use in mushrooms. I'm thinking since I've got water with lime already why not use it in the clay.
I may be homeless soon do you think building a double wall wattle with a straw packed enter core with cod inside and out would protect from the elements especially in winter say something 8×8 with a 4 foot back wall and 8 foot front wall so the tarp roof will be 45° something big enough for a bed and maybe a cob fireplace I've been thinking about this awhile now I know I run the risk of being run off for trespassing so it will be on government land but something that can be left behind with only losing a tarp if run off and rebuilt easily with a saw and very little cordage plus the things around you until I find a place suitable enough to build I'll use a hammock with a tarp cover to sleep and travel easily
Show the math... you can jaw about the materials for hours but if you don't do the calculations it's a big opinion experiment without a science basis... be an engineer... if you don't show the math comparisons using specific heat values and best layering choices, i.e. dual walls, then we know it's your dice roll... show the dual wall insulation math calculations... materials and time are way too dear to guess. Show your materials costs in the various build type evaluation table...
Examples of Specific Heats (BTU/LB °F) materials:
Paraffin wax 3260
Cork 2000
Water 4182
Wet mud 2512
Soil wet 1480
Soil dry 800
Wood 1500
Poly styrene 1400
Concrete 880
Brick 840
Slate 760
Perlite 387
Typical Heating BTUh Requirements Per Square Foot:
Look at map, learn zone, calc BTUs.
The table of required heating BTUs per square foot is based on the IECC climate zone map shown at url Source: IECC Climate Zone Map, U.S. Department of Energy (US DOE), retrieved 2018/06/21, original source: basc.pnnl.gov/images/iecc-climate-zone-map.
Climate Zone 1 - 30-35 BTUs / sq. ft.
Climate Zone 2 - 35-40 BTUs / sq. ft.
Climate Zone 3 - 40-45 BTUs / sq. ft.
Climate Zone 4 - 45-50 BTUs / sq. ft.
Climate Zone 5 - 50-60 BTUs / sq. ft. (some sources cite 50-55 BTUs / sq.ft.)
Climate Zone 6 - citation needed; popular heating zone maps for the U.S. do not follow the current DOE climate zone definitions that we accept here.
Climate Zone 7 - ditto.
A 1,000 square foot room requires 18,000 BTUs. A simple formula to determine your heating needs is: (desired temperature change) x (cubic feet of space) x .133 = BTUs needed per hour.
Get split heat pump system quote. Make sure you add wood stove/fireplace for backup heat.
Then go watch an engineer or a scientist. This guy is just a builder sharing his experience and knowledge.
He never claimed he is the genius scientific organic cob engineer...
@Abdulkadir Thecarguy He needs to say here is how I build and my calcs and results are... 1-2-3 Teachers teach...
@@douglaspohl1827 are you even listening? Cool, you did some math on stoves.
This guy is just saying "2+2 is 4, you have to learn the rest". This is basic information. He is showing the Rabbit hole. The jump is up to you.
Jump in, do the math Mr. Engineer. I would like to see them.
Maybe I should hire you to do the math.
@@thiscobhouse Thanks for all you have contributed to me. This Guy sending shade obviously has" issues"😂. Where can I find how to build slip form's? Thanks for everything 😊🙏🌍