Unvented roofs --- and shingle warranties

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

Story from the other side Jim;

Effects on roof shingles with spf unvented attics](http://rds.yahoo.com/_ylt=A0geu819RmNL_scAw7BXNyoA;_ylu=X3oDMTE1b2s0NDFqBHNlYwNzcgRwb3MDMQRjb2xvA2FjMgR2dGlkA01BUDAxMl8xMjU-/SIG=126np1713/EXP=1264883709/**http://www.insulstar.com/uploads/WebcastQandAs.pdf):):smiley:


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!