What kind of concrete to use for radiant heat concrete?
Q. What kind of concrete should I order for pouring on my main floor on top of radiant heat?
A. We use 3000 psi concrete with 3/8 (peastone) stone if the concrete is 1 1/2 - 2 inches thick and is being covered by another type of flooring like hard-wood or tile. This concrete mix is poured right over the plywood subfloor and is just used as a mass to radiate the heat. Expect some shrinkage cracking, it's normal with thin pours like this.
If you're using the concrete as a finished floor to stain, stamp, or polish, we use a 3000 psi mix with 3/4" stone and pour these floors 3 - 4 inches thick. This allows us to saw contraction joints in the concrete to control the cracking.
You just have to make sure your sub-floor is designed for the weight of the concrete. Concrete weighs 18 pounds per square foot at 1.5 inches thick and 25 pounds per square foot at 2 inches thick, double the weight for double the thickness.
Click here to post comments
Join in and write your own page! It's easy to do. How? Simply click here to return to Concrete Floor Questions.
If you liked this, please share. Thanks!
Subscribe to my monthly newsletter