Foam Board Roofing

As my article states you need a minimum of about 1 5 inch of eps 1 inch of xps or 1 inch of polyiso.

Foam board roofing.

Polyiso consists of a uniform closed cell polyisocyanurate foam core and provides one of the highest r values per inch of any rigid insulation. Reduce heating and cooling expense by 25 50 improve drainage and get a rigid polyurethane foam roof you can walk on. It s light weight provides ease of handling. Rigid roof insulation board.

Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. If you want to install rigid foam above your roof sheathing in climate zone 3 then 1 2 inch of rigid foam board is not ideal this rigid foam layer needs a minimum r value of r 5 and that s impossible with 1 2 inch of foam. Eps is used under roofing over foundation walls and beneath siding. Foam roofing advantages of dura foam.

Our polyurethane foam is renewable and water proof. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Foam board sheathing insulation johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency.