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Old 10-13-2017, 09:49 AM   #21
SIKSUKR
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Quote:
Originally Posted by Rusty View Post
Adding H clips when the sheathing never had them and there is no space between each section will not do anything to create a space.
Drilling a hole just to slide the H clip in doesn't make sense.

H clips are spacers that go between each section of the sheathing before nailing it down and will create a space the full length.
You obviously dont know what h clips are used for based on your comment.
They are primarily for this:
If we place the H-clips at the halfway point (12") between the trusses and/or rafters, the adjoining sheathing panel stiffens
considerably. As a result, the fastening of the roof shingles will be easier and the roof will remain flatter and more “in plane” over time (i.e., no sags and/or bowing due to accumulated load).
They do also provide a small spacing for expansion if the sheahing gets wet before shingling but that is not what they really are for.It supports abutting plywood between rafters and keeps them from bowing in different directions.You might want to do a little research before you comment on something you seem to have little knowledge of.
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