Unvented roofs --- and shingle warranties

[James H. Bushart]

Even where codes allow unvented roof assemblies, some shingle makers still restrict warranty coverage for shingles installed on unvented roofs.

[Marcel R. Cyr]

Story from the other side Jim;

Effects on roof shingles with spf unvented attics

[rspermo]

James,

It will interesting to see how this plays out in the future. Shingle manufacturers used to claim that a radiant barrier would hurt their shingles and then studies proved that radiant barriers only increased the roof temperature by 3% or less than degrees in the heat of a south Texas summer!