*
I am building a home using 8″ SIP’s over scissor trusses for the roof. Wasn’t planning any roof ventilation at all because I assumed it would effectively be a “cold roof”. I am considering using metal roofing, and am now finding info indicating that I should have ventilation to battle the condensation that can form under the metal—what do I do?? I am told that many asphalt shingle companies won’t warrant their products over SIP’s because of the lack of ventilation– that’s why I was planning to use metal in the first place. Any suggestions would be greatly appreciated.
-Becky
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Prescriptive codes don't address the connection at less common angles, so base the connection off more typical ones using bolts, structural screws, blocking, and steel tension ties.
Featured Video
Highlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
*
I am building a home using 8" SIP's over scissor trusses for the roof. Wasn't planning any roof ventilation at all because I assumed it would effectively be a "cold roof". I am considering using metal roofing, and am now finding info indicating that I should have ventilation to battle the condensation that can form under the metal---what do I do?? I am told that many asphalt shingle companies won't warrant their products over SIP's because of the lack of ventilation-- that's why I was planning to use metal in the first place. Any suggestions would be greatly appreciated.
-Becky
*
Without looking at your plans I am at a loss as to why you would want to put structural over structural, ie: sips over a truss? Why not just do your roof out of sips? Or why not just use the truss system and blow in cellulose and vent the gable ends?
A true structural insulated panel should be able to stand alone as a roof system and if installed properly should be able to support an asphalt shingle roof without problem.