Recent content by Lenny C

Agreed

Now I just have to go buy a dumbbell set. Jk.

Good point. I might try that.

Good. Now that we got that figured out, back to the issue at hand: should I buy the polyplank for under slab insulation?

It seems like water absorbing is a non issue seeing as though the stuff is used as a floatation device. It seems a little softer than the owens corning 25psi stuff at menards so would that equate to less dense? Would less dense offer higher r value?

I went to look at the stuff this morning. Its called polyplank. Its a closed-cell polyethylene plank. It looks like the same stuff the swimming pool noodle things are made of but a little heavier duty. It looks like it will hold up fine structurally but im concerned about the r value. I cant...

I looked at menards yesterday and the 15 and 25 psi both had the same r rating. That being said, I would expect the density to be pretty close. I couldn't tell the difference between the two by looking and feeling it.

I found a deal on some 2 inch insulation on Craigslist for 8 bucks a 4x9 sheet. They said its r value is 10-12 but they dont know the pressure rating. I'm assuming it's 15psi. I asked my concrete guy and he thought it would be fine. I searched for some threads concerning this subject but being...