Rigid Foam Insulation Roof Application

There are at least two good reasons why this approach makes more sense than installing the insulation under the roof sheathing.

Rigid foam insulation roof application.

Scroll below if you d like to view an infographic comparing the three types if insulation. 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. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. This is the most easily recognized type of rigid foam insulation thanks to its popular blue green or pink color.

Insulated roof assemblies can be vented or unvented. 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. Xps is a recyclable insulation that s mostly used in walls and below grade applications. As the most used insulation type for roofing applications polyiso is a closed cell foam that is created by heating chemicals and synthetic materials into a composite material that cools into rigid foam panels.

This section outlines the conditions for unvented attic roof assemblies. Nail it around the edges with roofing nails.