I am getting very close to breaking ground on my project, but I need some more design advice. I am building in the Pacific NW with an insulated slab, SIPS 6" walls, 12" roof panels, and 50 year comp roofing. I have been researching the hot roof / cold roof subject and I have determined that the cold roof makes a certain amount of sense, BUT... do I really need it? Even though the cost is relatively small compared to the rest of the components, I have kinda used up my budget already.(like 12" instead of 10" roof panels). Also my approved drawings do not call for the extra roof detail so I would still have to approach the county with this change. Is the "telegraphing" issue very commmon? Also If I do go cold roof do I really need a 2" gap as detailed in Joe Lstibureks book? Any real world advice? Thanks.

We live in Wyoming. SIP roof - not a cold roof. 10" panel Up to three feet of snow on it by the end of winter. We have no problems.

jmagill, Is your roofing composition?

No metal

Metal does seem to be a better option for a hot roof design but for various reasons I have chosen Composition and now I am worried about that, particularly the telegraphing issue.

I am bringing this back to the top again in the hope that some of you out there have something for me and just forgot to reply.