Framing & StructuralQuestion 377 of 700
When installing tongue-and-groove wood structural panel subflooring, which practice BEST reduces squeaks and improves diaphragm performance?
a.Butting panel edges tightly with no gap
b.Nailing only at panel corners
c.Gluing the panels to the joists in addition to fastening
d.Laying all end joints on a single joist in a continuous line
Explanation
Field-gluing the subfloor to the joists with construction adhesive in addition to nailing or screwing greatly reduces squeaks and stiffens the diaphragm. Panel edges need a small expansion gap, not a tight butt; fastening only at corners leaves the field unsupported; and aligning all end joints on one line creates a weak, hinge-like seam rather than a staggered layout.
Law Reference: 2025 CA Residential Code §R503Practice all 700 questions free — no signup required.
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