Rigid Foam Insulation Roof Application

Scroll below if you d like to view an infographic comparing the three types if insulation.

Rigid foam insulation roof application. This section outlines the conditions for unvented attic roof assemblies. Insulated roof assemblies can be vented or unvented. Xps is a recyclable insulation that s mostly used in walls and below grade applications. Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing. Start at the bottom of the roof and place the first piece of rigid foam insulation against the metal flashing starting at the center line. As far as cost and r value goes xps is the middle option of the three.

This is the most easily recognized type of rigid foam insulation thanks to its popular blue green or pink color. There are lots of different ways to insulate this type of roof but one of the best methods calls for the installation of rigid foam insulation above the roof sheathing.