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Re: rafter shims
Sounds like repairs were needed.
They 'probably' used the same nails to nail those areas down with (nail the roof sheathing down) as the rest of the roof, meaning that those nails are not as far into the rafters/trusses as the others.
Being at the end of the roof, that's where the high pressure is, and *not* where you want short nails to be.
Were the shims continuous strips of short strips with gaps? Short strips with gaps would make it even worse.
Besides, those shims would also have to be independently fastened to the rafter to the same extent as the roof sheathing, meaning twice as many nails would have had to have been used. We all know that most likely never happened.
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