RADIANT HEAT CONCRETE FLOOR | OVER PLYWOOD
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- Опубликовано: 12 сен 2024
- #radiantheatflooring #concreteflooroverwood #mikedayconcrete
In this video I'm pouring a radiant heat concrete floor over a plywood deck.
This concrete floor will heat the entire house using the radiant heat tubing to warm the concrete.
In Maine, I pour a lot of concrete floors with radiant heat tubing in the floor, just like the one in the video. This concrete floor is 1.5 inches thick and is one of the best ways to install radiant heat in a new home.
The concrete floor is being used as a "big mass" to collect and hold the heat from the hot water running through the tubing. In most cases there's some other type of flooring being installed over the concrete.
My job is just to get the concrete floor flat and pretty smooth. Most of the time I'll finish the concrete on a floor like this by hand. I'll use my concrete kneeboards and mag float & hand trowel the concrete smooth.
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Well guys I did this 24 years ago and it heats amazing loved it. Down side and recommendation is the 11/2” thick concrete will crack and possibly shift at the cracks. Back then we put new carpet over majority and ceramic in kitchen/ bathroom. If I do it again I would lay a mesh for sure. When we pulled the carpet to lay wood floor we had issues with offset cracks and high spots.
I've never seen it done over plywood before, it intersting.
Just got my tubing and manifolds in today for my house build.
When I did my house I use 2x3 sleepers ran the tubes between them; the 2x3 were my nailers, and I used a pump truck. I sealed the concrete I didn't want the dust from the concrete. I used, cure, and seal, that was 20 years ago.
Occasionally we'll pour one with sleepers, but most are this way. Sleepers are mostly used when someone is nailing down a hardwood floor in our area.
Hey, thanks for all your videos. I am pouring 1 1/2” concrete over OSB sub floor and heated tubing. My client would like to finish the concrete with epoxy. After concrete is dried and cured and cracked we would like to go back over patch any cracks and put epoxy down. What do you think would be the best mix for concrete to have minimal cracking with a 1 1/2” thick on the second and third floor of this project. PSI? Aggregate? Reinforced fiber?
Good stuff man, I appreciate the videos!
Thank's Frank!
This is a cool concept, and you did a great job. But I'm skeptical about how much weight this adds to the structure of the home. I understand it may be engineered, and I read that floor trusses were used. Was the subfloor structure beefed up below such as additional columns and such?
Sub-floor wasn't beefed up, it didn't need to be. 1.5" of concrete adds approx 18 - 19 pounds per square foot to the floor. These floor systems are rated for much more than that now a days.
@@MikeDayConcrete How does one find out how much weight their floor system can support?
yeah that was cool to watch! 👍
That's impressive to get 10yds flatwork down in all those small rooms in 90 min. I've seen gypcrete done that was virtually self-leveling, but not all the work concrete needs like this. Would attaching any sort of vibrators to the joists help and make it more self-leveling without resorting to plasticizers or higher water in the mix ?
I'm not sure, we've never thought of that. We use water reducer in the mix so pouring it loose isn't a problem.
This concrete floor has a thermal mass. May take longer to warm up but will stay comfortable longer.
Have you ever done a stamped finish as the final floor ? I want to add hot water radiant to make a closed in concrete porch a four season room. This should allow a using 2 inches and floor would look like tile. I guess the only problem would be cracking over the long haul.
Yes, quite often. Here's one we did. www.daysconcretefloors.com/stamped-concrete-manchester-me.html
Nice to run across someone who does things the right way, I'm currently GCing a 2100 sf new construction home in the Northwest part of Connecticut that is all on one level. Has 1 inch Advantect (yes they make 1 inch) and floor trusses 16 oc that are 26 feet wide. Do you guys do work in our area?
Sorry we don't. You must be able to find someone out there? Can't you?
Could you have stamped that concrete with a pattern ie wood grain? If not, could you have done thinner layer and then a gypsum layer on top once it cured to do a stamp layer? If you did control joints in the first layer, the second stamped layer would have a better chance of not cracking? I like the idea of having as much thermal mass as possible. Thank you!
Hi Mike, I'm doing a radiant on top of a slab. I glued down insulation and then stapled pipe down. I want to keep concrete exposed so I decided to pour a 2 inch thick slab. Is there anything you recommend?
Thank you for your doing videos!
Derek
Granite Falls , WA
We would use a micro fiber mesh in that and saw contraction joints about every 6' or so to help control shrinkage cracks. We do quite a few of those like that, I use a 3500 psi mix with 3/8 stone.
At 2" thick slab is there a keyway I could use for the contraction joints?
Have you done a full finish with color on the concrete instead of putting an additional finish floor on top? If so what did you do ?
We stain and seal concrete floors. We stain and polish them too. I also epoxy a lot of concrete floors.
Mike Day Everything About Concrete : how is the radiant tubes attached to the plywood?
@@jaymccormack5850 he mentions it at least once...stapled down
Why not add a plasticizer and flow it more like gypcrete? Seems like it would save a lot of work leveling.
Hi Mike, would you add mesh over the tubing to prevent cracking? Our house got a 4 ft crawl space
We do that sometimes, it does help hold a crack tight if it does crack but it doesn't prevent it from cracking.
If there is no insulation under an existing concrete floor, would one put a layer of the bubble foil and then plywood with the tubing? Is the plywood or OSB be sufficient insulation? Thanks for the great education!
Hi Mike, Great I've found the video. Im in CT and plan to install RH over the 5" slab. There is no insulation underneath it. I m thinking to use R10 Ampex 24-in x 48-in Grey Insulation Panel with nubs to have 1/2" PEX layout in between them. Have you ever poured above the panels and what are your recomendations? Thanks
Yea, we pour on those panels all the time. It's pretty much the same as pouring on styrofoam. You should be good and have no problems.
@@MikeDayConcrete Mike what material do you use between concrete and a wall when pouring aganst the wall framing if the pour lever of concrete is higher than the PT board height? or there is 2x6 frame and drywall and you need to pour for radiant heat floor. Please advice. thank you
What's the floor structure like under there? Wondering what they used for joists and subfloor. I'm thinking of doing a concrete roof so this is pretty much the same idea..
The floor structure in this home was floor trusses every 2' on center with 3/4" Advantec plywood flooring. Some houses the floor joists are either 2x10 or 2x12 one foot on center.
What is the tubing? Is it heat certified and wont degrade & separate cause of the heat?Is it cement certified and won't burn or dry out?
Hi. I noticed the workers walking in the tubes. Do they not damage it? Or compress the tubes? Any comments appreciated. Thanks.
How does the water tubing radiated heating compare to electrical? Maybe cheaper elec cost, but is it as effective? and what are some general cost differences in radiat heat materials.
is it ok to pour concrete over floor joist directly on to the dirt?
I've seen gypcrete floors like this but never heard of concrete. What's the benefit of using regular concrete instead of gypcrete?
It's a lot less expensive, and my contractors say we can get the concrete a lot more level than the gypcrete.
Could you do this over broken tile?
What kind of mix do you use
Aggregate size
Etc
Why not Gyp-Crete? self levels....pump it in.
Question, why don’t you put down polyethylene sheeting between the subfloor and the thin slab concrete?
There's no need to. What would the poly do?
Mike Day Everything About Concrete Mike, my concrete guy said we should do it because the calcium could affect the OSB ? But I do not know my self, that is why I asked you. PS, I love your channel!!
Want to do this to a container floor for a kennel to keep puppys warm and make it washable so cracking would be bad. sould i do it thicker
Yes, thicker would be better. 4" minimum
Do you know anyone on the west coast - Seattle area that does this? We are having a hard time finding someone for indoor. Thank you!
Why aren’t these floors poured before the frames are put up?
Very few are, it seems like the builders are in such a hurry to get the building up. We do most of them this way.
No heat transfer plates?
Silly question. On these type of floors you don't need rebar?
No, no rebar required. The concrete isn't being used for structural strength only to hold the heat from the pex tubing.
@@MikeDayConcrete hello from France! I already have a structural solid concrete floor, I've put polyuréthane insulation on, then electrical radiant floor(more easy for DIY) and I want to pour a 3 inch concrete slab, power trowel and polish it without aggregate and level 3 of gloss. Since it's not structural, I understand we don't need wire mesh but what about the joint? And also, will I have problems with the microfiber polypropylene if I don't expose aggregate and only start with a 200 resin pads? Thank you so much, you rocks!
@@azadatay5480 Depending on the size, you'll have to saw contraction joints for anything larger than 2 meters square. You should be ok with the microfibers. If you do end up seeing some, just use a small propane torch to burn them away.
@@MikeDayConcrete thank you Mike! Don't won't to take your time but just another question : what about polishing of self compacting concrete floor? Is it just the same? I don't won't to expose aggregate so I don't care if the little stones runs lowers into the concrete.
Thanks again, I think I watched half of your videos, I was more into wood stuff and plastering, it's my first time with a real concrete floor and I became obsessed with concrete🤣
How did they keep these heat from radiating down through the bottom?
Jason, they insulate under the floor joists.
Heat rises, and wood is a poor heat conductor. So those are 2 things going for it. Concrete is a good at absorbing heat and will give that radiating value and will go up.
Could I polish that out
No expansion around the perimeters ain't gonna be good
Radiant flooring is great, but you should be using gypcrete for this installation, reasons are gypcrete is self leveling, light weight compared to concrete, and won't crack and it has a thermal mass.
Concrete should not be used for this application. BEWARE.
I put tar paper down first. Plywood was absorbing water or fast for me. I’m going to add a water reducer next time
That floor is advantech which is "waterproof" for x number of days.
The problem with this concrete over wood floor is if the wood underneath gets rotten, then it is hard to fix it. I believe for durability consciousness: When using concrete over wood flooring for second floor, you have to place steel rods framing before pouring concrete.
Does anyone knows the most important part in building homes?
Read below. It is a long letter but will give you a good knowledge in building your home. People are getting sick nowadays for PRIMARY reason, they sinned against the laws and commandments of God. SECONDARY reason they live in homes with bedrooms that are not facing east where the sun rises. What is so important about having a constant sunlight in the bedroom?
Sunlight is like a gasoline. Car will not start without gas. When the sunlight enters your body, it manufacturers natural calcium. Calcium helps strengthen the bones, teeth, muscle and calms the heart. Sunlight boosts immune systems, helps every vitamin function in the body properly, helps regulate hormones imbalance that causes mood swing, kills bacteria, helps lose weights, and anti inflammatory. Researchers said it can protect you from corona virus, and infection. Sunlight also keeps your room warm in cold season, and kills molds and bacteria.
Malachi 4:2
But to you who fear My name The Sun of Righteousness shall arise with healing in His wings; And you shall go out and grow fat like stall-fed calves.
Bedroom is the most important room in all the rooms in the house, because it is the place where you spend most of your time. For those who are planning to build homes, it is the best choice to place all bedrooms facing east as the morning sun has the most beneficial stage. People who already built houses, try to build balconies where it faces the morning sun.
Psalm 127:1
Unless the Lord builds the house, they labor in vain who who build it; Unless the Lord guards the city, the watchman stays awake in vain.
The Lord God gave us sunlight to the utmost. Due to disobedience towards His Law, people corrupted it with pollution. It thins the ozone layer in the atmospheres that protects us from sunburns and ultraviolet light. The result of it, people cannot get in the sun as what their body needs because of extreme heat coming from the sun.
This knowledge comes from Mount Zion, Heavenly Jerusalem. Lord Jesus brought in this last day to save His people from destruction and death. It is the Kingdom of God which is to be built physically. It used to be a part of Israel. After the Jews rejected the Lord Jesus, the Lord God took it from them and gave to another nation in the east that will guide many people to serve God in Spirit and in truth.
Psalm 48:2
Beautiful in elevation, the joy of the whole earth, is Mount Zion on the sides of the north, the city of the great King.
Daniel 2:44
And in the days of these kings the God of heaven will set up a kingdom which shall never be destroyed; and the kingdom shall not be left to other people; it shall break in pieces and consume all these kingdoms, and it shall stand forever.
Matthew 21
"Therefore I say to you, the kingdom of God will be taken from you and given to a nation bearing the fruits of it. And whoever falls on this stone will be broken; but on whomever it falls, it will grind him to powder.” Now when the chief priests and Pharisees heard His parables, they perceived that He was speaking of them.
Lord God of hosts, Holy Father
Lord of hosts, Lord Jesus
The Spirit and the bride
Mount Zion, Heavenly Jerusalem
Gabriel, an angel of the Lord
Wood in direct contact with concrete will rot and fail 100%. Am I missing something?
Even a poly vapor barrier would be better than nothing.
Sal, I have to disagree. I've been doing these for 39 years and never heard of one failing. Once the concrete is cured there is no moisture to make the wood rot. What is your reasoning for thinking this will fail. These floors are engineered, it's not my design.
if it was in contact with soil, perhaps. once it is a solid mass, where is the moisture going to form from? AND, if that was a concern, a couple uses of the heater will eject minimal moisture out
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