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The Home Smithy
The Home Smithy, Home Builder
Category: Home Improvement
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Experience:  #1 Home Improvement Expert 30+ years experience
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Is there a maximum allowable gap between sheets of plywood?

Resolved Question:

Is there a maximum allowable gap between sheets of plywood? When the roofers were replacing my old roof, they needed to replace a sheet of plywood that had rotted. In doing so, they broke off about 2" to 2 1/2" of the next board which actually runs under a dormer window. Now, if I stand in the unfinished attic I can see straight through that gap to the flashing. I'm concerned that a hard driving rain can blow underneath the flashing. Is there any code on the maximum gap between pieces of sheathing?

Thanks
Submitted: 2 years ago.
Category: Home Improvement
Expert:  The Home Smithy replied 2 years ago.
Hi and welcome.
If you can see flashing then they need to come back out and fix it!!
There should be a 1/8" gap, for expansion of the material, between pieces of roof sheathing, but no more.
The flashing and roofing material should keep the rain out. My concern would be in about 5 years after a few good hot summers when the tin and roofing material begin to expand and contract without the support under them in that spot. It can be a very real potential for a leak.
Let me know if you need anything else.
Best, Smitty
The Home Smithy, Home Builder
Category: Home Improvement
Satisfied Customers: 9619
Experience: #1 Home Improvement Expert 30+ years experience
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