3/4" foam board insulation help

dablack · 08-22-14, 07:38 AM

So I just picked up 17k sqft of foam board insulation. It is 200 sheets of 4x21' by 3/4" thick. If I remember right, it is R4.

I'm building a two story and right now I'm framing. I've got 2x6 construction and OSB sheething with house wrap on the outside of that. I was thinking of hanging the foam insulation on the outside of the building vertically. This would allow very few cuts. I was thinking 3 layers and offset the seams so they don't line up.

My question is, what tape do I use on the seams?

What fasteners do I use to fix to the house?

With 2.25" of insulation on the outside, what do I need to do about putting on horizontal siding?

thanks
Austin

08-22-14, 07:38 AM	#1
dablack Helper EcoRenovator Join Date: Jan 2010 Posts: 65 Thanks: 0 Thanked 13 Times in 6 Posts	3/4" foam board insulation help So I just picked up 17k sqft of foam board insulation. It is 200 sheets of 4x21' by 3/4" thick. If I remember right, it is R4. I'm building a two story and right now I'm framing. I've got 2x6 construction and OSB sheething with house wrap on the outside of that. I was thinking of hanging the foam insulation on the outside of the building vertically. This would allow very few cuts. I was thinking 3 layers and offset the seams so they don't line up. My question is, what tape do I use on the seams? What fasteners do I use to fix to the house? With 2.25" of insulation on the outside, what do I need to do about putting on horizontal siding? thanks Austin