Rigid Foam Insulation Roof Application

Nail it around the edges with roofing nails.

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. 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. As far as cost and r value goes xps is the middle option of the three. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings.

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. Note that table r806 4 indicates the amount of insulation above the roof deck or air impermeable insulation below the roof deck required for condensation control assuming minimum required total insulation as indicated in section n1102 building thermal envelope. Xps is a recyclable insulation that s mostly used in walls and below grade applications. Insulated roof assemblies can be vented or unvented.

This is the most easily recognized type of rigid foam insulation thanks to its popular blue green or pink color. 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.