Not so visible in photos because of the way the sun hits the roof but very visible by naked eye. Enough for my neighbors to stop by to ask me what's wrong. I had the new roof installed 2 weeks ago and the dipping effect was visible from first day. I spoke to the company that installed the roof and after sending over one of their production managers the told me that the job was done correct but my plywood under the shingles has buckled. I told them as we signed the contract that any damaged plywood can be replaced at my cost, but they say the plywood was not damaged only warped. The house is 16 years old. I have labor warranty with company. What should I do?
Best Answer
I had a similar issue on a house (built in 1973) that had 3/8" plywood for roof sheathing. Over the years it tended to bow downwards, leaving an odd look from the curb. To solve it, I cut multiple 2x4 stretchers that fit between the trusses and boosted the plywood even.
You didn't say if it was a truss roof or rafters, but the solution should work the same either way. You could install the 2x4 stretchers at the joint of the sheathing and it should level the roof out. I will say that unless you have good spacing in your attic, it will be a practice of straddling the trusses and getting in to tight spaces.