Dewatto House

Here's the vapor barrier all taped down. It's a 15 mil product, so you don't create pinhole leaks when walking on it. Then, we put down the foam, and that is covered with 6x6" remesh, more for laying out the hydronic tubes than for strength in the slab.






The tubing is Pex-Al-Pex, meaning that it's a layer of Pex plastic, a layer of aluminum, then a layer of Pex. This does two things. First, when bent it stays bent. No wrestling with trying to tie down a tube that wants to spring back into a coil. Second, the aluminum acts as an oxygen barrier to protect the circulation equipment when the system is complete.