Originally Posted By: dbowers This post was automatically imported from our archived forum.
Its clearly obvious the heathing glue was applied when it was under 31 degrees outside causing the funny granular pattern on the underside of the heathing.
Originally Posted By: scieslewicz This post was automatically imported from our archived forum.
Hi Larry,
H clips are metal clips that look like an "H". They're used for spacing the sheathing so that the sheathing may expand and contract. Are they required? Good question....the IRC talks about them briefly. I just look for them and if they're not installed (which is rarely), I ask for specs on the sheathing.
Next time you're in a newer house attic look up and you'll probably see them.
Originally Posted By: jquinn This post was automatically imported from our archived forum.
lfranklin wrote:
What are H clips for? Are they required?
H clips is short for Heathing clips.  
Originally Posted By: jquinn This post was automatically imported from our archived forum.
scieslewicz wrote:
Hi Larry,
H clips are metal clips that look like an "H". They're used for spacing the sheathing so that the sheathing may expand and contract. Are they required? Good question....the IRC talks about them briefly. I just look for them and if they're not installed (which is rarely), I ask for specs on the sheathing.
Next time you're in a newer house attic look up and you'll probably see them.
Take care,
Sue
While spacing the sheathing for expansion is good practice, H clips primary purpose is to support sheathing at joints between rafters/trusses. In my area for example, they are required between trusses which are spaced 24" apart, but not for rafters which are spaced 16" apart. Thickness of sheathing also plays into whether they are required as well.
Now if the rafters were spaced closer together, or thicker OSB used, would the missing H-clips really be an issue?
(Hint ... see IRC R803.2.2 or the APA standards, which have different span ratings for panels both with and without edge support ... blocking, T&G sheathing, or H-clips ... )
Couldn't resist mate ...
-- Robert O'Connor, PE
Eagle Engineering ?
Eagle Eye Inspections ?
NACHI Education Committee
I am absolutely amazed sometimes by how much thought goes into doing things wrong
Now if the rafters were spaced closer together, or thicker OSB used, would the missing H-clips really be an issue?
Since the rafters in Gerry's question are not closer together...and since thicker OSB was not used...and while were at it, since this is not a concrete roof deck...I think I'll agree with Gerry's answer on this one.
Oh, Oh, Oh.... what if vinyl siding was on the house instead of hardboard ??
Originally Posted By: dedwards This post was automatically imported from our archived forum.
Don’t know about anywhere else but in my neck of the woods the printed side of the OSB panels has to be down so the code inspectors can read the specs and see if its the right stuff. It might be too thin but I lost my micrometer glasses in the last attic I was in and refused to go back for them.
Originally Posted By: Mark Dudley This post was automatically imported from our archived forum.
H clips is a good one, but I’d say the sheathing is spaced improperly. That’s a huge gap between them, OSB sheathing is usually stamped ‘sized for spacing’, meaning it is cut short length and width to allow for expansion. The H clips not only serve the purpose of spacing the sheets, but provide some support for the unsupported joint sections.
