Attaching exterior insulation
I am looking for the best way to temporarily attach my exterior insulation to the sheathing. I am installing 2 layers of 3″ polyiso staggered, with Tyvek (WRB) on top of the foam and then 3/4″ furring to hold it all in place permanently. My furring is being installed horizontal as I am installing vinyl board and batten siding.
I was planning on using a couple 3.5″ cap nails to hold the first layer, my concern is how to keep the second layer in place, while I install the Tyvek and furring strips.?
I have not been able to find 6.5″ cap nails and I don’t think ” nailing” into the first layer would hold it.
Any ideas or advise is appreciated,
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