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Old 11-14-2018, 09:01 AM   #16
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Re: Waves in roof


My latest armchair theory is a combination of vertical plywood and shady side condensation.

Plywood should never go on a roof vertical unless its nailed to horizontal purlins .
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Old 11-14-2018, 09:12 AM   #17
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Re: Waves in roof


Quote:
Originally Posted by craig11152 View Post
My latest armchair theory is a combination of vertical plywood and shady side condensation.

Plywood should never go on a roof vertical unless its nailed to horizontal purlins .
They may have missed the H clips too. I am thinking solid blocking could push it back up.
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Old 11-17-2018, 12:46 PM   #18
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Re: Waves in roof


They did use H clips -- that I know. Few pics attached. The level is a four footer and ttle sticks are chop-sticks from a Chinese takeout place. The key question: Can this all wait another four or five years until I had planned to replace the roof or am I in trouble now? Thanks!

Waves in roof-img_0502.jpg

Waves in roof-img_0506.jpg

Waves in roof-img_0509.jpg

Waves in roof-img_0516.jpg
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Old 11-17-2018, 12:59 PM   #19
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Re: Waves in roof


Usually we expect dips to be between the trusses, you have a low truss. That should be easy to find on the inside and make sure it is not cracked or broke.
We always crown lumber and put crown up, once in a while a piece can change for what ever reason and sag. I would give that a good inspection from the inside.
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Old 11-17-2018, 01:28 PM   #20
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Re: Waves in roof


Can do. What should I look for? In the rafters and in the underside of the plywood? What's bad look like?
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Old 11-18-2018, 01:08 PM   #21
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Re: Waves in roof


Pics from inside the attic. No water stains, no mold on underside of plywood. No vertical cracks in the rafters, but some horizontal cracking. Not sure if this is a sign of something bad, or if every 45 year old house has cracks like this in the rafters. All thoughts welcome!
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