Foam Board Insulation for Side Walls

[WanderlustExistence]

For those of you that used foam board insulation in your side walls, did you use 1.5 inch? If so, where in the world did you find it. No one carries that size anymore and I really don't want to have to double up because it's already gonna be pricey. Any tips help. I keep going back and forth on what to do and whats the safest to do for insulation and then I can't find the one I decide on lol.

[CaptSquid]

I used the 1" double-faced foam on mine. It fits nicely between the cable runs on top and the chair rail on the bottom. Plywood facing goes over it.

[WanderlustExistence]

Originally Posted by CaptSquid

I used the 1" double-faced foam on mine. It fits nicely between the cable runs on top and the chair rail on the bottom. Plywood facing goes over it.

Oh okay. The depth itself on the side is about two inches thick. So we know we can't do the full 2 inches because there are screws at the bottom where the chair rail is so we are going to have to figure something out with that, plus we need a little space, but not enough for leaks. We are covering it with pallet boards. I think we are running our electric on the top but I'm not sure (I'm not handling that part). I figured the 1.5 would be perfect with some spray foam touch ups if needed. I just want to make sure the 1 inch would be enough to insulate without leaks or anything. Never done any of this before so IDK what works lol. I have heard mixed reviews about spray foam being dangerous (plus it's expensive) but I honestly feel like thats the easy way lol

[o1marc]

I have rigid pink in 1/2" and 1", one of each in there fills 1-1/2". Actually my 1/2" is polyiso, so put it on the important side.