Position plywood clips onto the top or upper horizontal edge of the installed plywood panels between each rafter or support block.
How to fix plywood on roof if theres plywood clips.
From the inside there doesn t appear to be any water damage or rot.
Installing plywood on a roof hello youtubers here s another video about plywood sheathing and composition shingles after replacing all damaged wood and.
If your home has plywood decking below your shingles and the plywood was not nailed properly.
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Next if you are looking for a quick fix that should last until the next time you replace the roof you could always use some spray foam.
If there is moisture built up under the ply roof sheathing due to inadequate attic ventilation coupled with poor vapour diffusion retarder membrane then the moister side of the ply will swell more than the dryer side causing convexity cupped up.
In response to jfmann and pdhal3 the problem may well be differential moisture as jae suggested.
Any ideas on how to fix this.
For bats they make 1 way doors that you attach to allow them exit but not come back in.
H clips provide additional stiffness between bearing points for the unsupported edges of wood panel plywood or osb roof sheathing along with the necessary 1 8 gap for expansion as shown below illustrated on a bag of simpson h clips.
Cut off the blister or peel it completely back until the damaged laminate is flush with the main board.
These long raised up sections are from improperly nailed roof decking.
The h shaped fins slide over the plywood until the middle connecting section is against the plywood s edge.
However we will dive into that later.
Some older h clips do not provide a built in gap.
This is a easy problem to diagnose but not very easy to fix.
Not always required but a good idea.
Put it there for a while to let all the critters out and then remove it in favor of a permanent fix.
The plywood is nailed to the roof rafters and unless the builder used a tongue and groove plywood or h clips the long edge can warp in between each rafter.
The fix on this is something that can be very intrusive.
I suspect that the plywood used was cheap quality or too thin.
Just joined the forum.