Floor Assembly Acoustic Calculations

Last updated February 10, 2025
By Ian Story

Reference

2019 AWC Technical Report No. 15

Baseline Floor Assembly

19/32″ plywood over 2×10 floor joists w/ 3 1/2″ fiberglass batt insulation. Use RC channels @ 24″ o/c w/ 5/8″ gypsum board. Flooring is worst-case for each frequency.

Increasing Insulation

19/32″ plywood over 2×10 floor joists w/ 8 1/4″ mineral wool insulation. Use RC channels @ 24″ o/c w/ 5/8″ gypsum board. Flooring is worst-case for each frequency.

(2) Layers GWB

19/32″ plywood over 2×10 floor joists w/ 8 1/4″ mineral wool insulation. Use RC channels @ 24″ o/c w/ (2) layers 5/8″ gypsum board. Flooring is worst-case for each frequency.

Thicker OSB Sheathing

23/32″ OSB over 2×10 floor joists w/ 8 1/4″ mineral wool insulation. Use RC channels @ 24″ o/c w/ (2) layers 5/8″ gypsum board. Flooring is worst-case for each frequency.