Jefe:
Always a good write up - as others I have seen on the internet from you. The blue Dow insulation/foam product you are using is indeed difficult to source. (Dow Styrofoam Blue Board rigid XPS insulation) I am wondering if anyone has experience with what might be an alternative available at HomeDepot.
Picture from Jefe's writeup
Here is a link to the "Pink stuff" at HomeDepot (
FOAMULAR NGX F-250)
Owens Corning FOAMULAR Scored Squared Edge Insulation Sheathing is perfect for use on wood, steel framing or concrete walls.
www.homedepot.com
It would
seem this product also offers the 25psi rating the blue Dow stuff you used has. Any thoughts?
Personally, I am just looking at saving some weight by getting rid of wood risers.