In the video, the insulation was put on top of the vapor barrier. I was told that's not correct. The process steps involve compacted dirt, then 3/4 stone compacted, then insulation, then 6-10 mil vapor barrier, and then concrete (with fiberglass or metal wire). You want the weight of the concrete pushing down on the vapor barrier holding the insulation in place. With your method, there is the risk that some insulation could rise up through the concrete.
so why not put the foam on top of the concrete where it will prevent the need to heat and cool it? the foam is so sturdy and plywood on top of it would make it just a firm as plywood on concrete
Wow seriously I can’t believe the people making comments about you guys having fun and working too!! Get a freaking life! You should play and work and enjoy your life. If we didn’t laugh and have fun when we work we wouldn’t want to come to work! Life is too short not to enjoy your work. Great job doing both!!
My OCD noticed the one piece he cut and laid up side down and couldn't watch anymore. I know it doesn't matter but it makes things look more professional. Plus you took all day to lay what ? 50 sheets of foam with three guys? Your fired. I can't afford to pay you guys hourly that's for sure.
Those that do the vapor barrier over the insulation ARE asking for trouble and added costs down the road when the foam starts to deteriorate and floor starts to show signs of failure.
Wouldn't you want the vapor barrier under the foam to prevent ground water from contacting the foam, or is it more for water vapor condensing between a cold surface and a warm one? Vapor barrier for walls typically faces inward, so following that logic, it makes sense to have the barrier on top of the foam, like you said. Can you elaborate?
If you tape the seams of the foam board and place a barrier over top, won't the tape deteriorate over time due to ground moisture? Or is this a non-issue?
Mark, They 100% did it the right way. By doing it your way, the moisture could get up and into the foam. The vapor barrier being against the sand, etc first will stop it.
The way I see it. The poly was layed out first to prevent radon gas from seeping through the taped joints. Nothing to do with water vapour. Radon gas is second leading cause of lung cancer.
