New plywood sheathing needs fix?
I’m working on exterior improvements during a complete remodel on my 1968 house in CZ 6A near Minneapolis, and I have concerns with the quality of work the exterior crew has done.
The original stucco and 3/4″ fiberboard was removed, and I’m trying to air seal the new 3/4″ plywood sheathing best I can with taped seams. While installing the new sheathing, the crew was quickly slamming up the sheets tight together even though it says directly on it to leave a 1/8″ gap. They said it was fine without a gap, but they did run a kerf between sheets after it was installed. Now the sheathing is complete and I’ve noticed:
1. Overdriven nails:
Almost every 2″ (6d) ring shank nail was overdriven by +1/8″. They explained this was normal with the framing nail gun, and it wouldn’t drive the nails far enough into the studs if dialed back.
2. Gaps between studs and sheathing:
The plywood is tight to the studs along the edges, but there many large gaps up to 3/8″ between the studs in the middle of the plywood. I was told this would be tight after nailing the field, but after nailing these gaps still remain. Some of these gaps are around the edges of the window rough openings.
3. Missed nails into studs:
17 studs had 4 or more nails that missed for a total of 125, and none of those sections were re-nailed. A few had more than 10 on a single stud. This was only for 110′ linear feet of wall sections 8′ high.
4. Misaligned edge of plywood and stud:
They vertically misaligned one sheet with the studs so badly that the bottom 1/2 was unable to be nailed on edge because there wasn’t enough plywood overlapping the stud.
I’ve attached a few photos as a reference. Their excuse is that the 3/4″ plywood is difficult to work with. I think failing to align the plywood and nail it properly is what caused these problems. To make it even worse, these guys already installed most of the house wrap…which also has installation defects. At a minimum, I feel the areas with missed nails need to be re-fastened.
Should I try to get the plywood tight to the studs to improve the air sealing within each stud bay?
Am I being overly picky about these issues or is this low quality work?
Also, this is the same crew scheduled to install the new windows, and right now I don’t have a lot of confidence they can do that correctly.
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