Framing & StructuralQuestion 305 of 700
Where wood structural panels serve as combination subfloor-underlayment to receive resilient flooring directly, which panel characteristic is MOST important?
a.Maximum knot size
b.Darkest face veneer
c.A touch-sanded face and a rating for combination subfloor-underlayment
d.The heaviest available panel
Explanation
Panels used as subfloor-underlayment for thin resilient flooring must be specifically rated for that use and have a smooth (touch-sanded) face so joints and grain do not telegraph. Knot size, veneer color, and sheer weight are not the controlling factors for a finish-ready underlayment surface.
Law Reference: 2025 CA Residential Code §R503.2.4Practice all 700 questions free — no signup required.
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