I spent 100,000 on a pole shop with living quarters & the builder used tri ply for the vapor barrier & it rains inside when it starts getting cold outside. And I know it's because of the heated space but I didn't build a shop for all my valuables to get soaked. I think I got hosed?
How come my roof leaks? This stuff sucks (2026 Update)
Oct 04, 2013
Last reply: 1 month ago
2 Replies
Condensation on the inside is possible if there is no insulation between the cold roof and warm interior of the building. Also there should be vapour barrier installed under the insulation. There should be a cold dead air space above the insulation same as your house. In the interim a lot of air circulation may help. Also keep a window or two cracked open to release moisture trapped inside. Ventilation is very important.
One thing I've learned is that the spot where the water shows up inside isn't always directly below the actual leak. Water can travel along the roof decking or rafters before it finally drips through. I'd definitely check the flashing, roof penetrations, and any areas uphill from the leak before assuming the shingles themselves are the problem.
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