Most codes classify interior finishes by ASTM E84 / UL 723 flame spread and smoke results. Class A (flame spread 0–25, smoke ≤ 450) is the safe default for commercial interiors. Some jurisdictions in Canada reference CAN/ULC-S102. Ask for the test report for both core and fabric.
Learning center / Acoustics fundamentals
Fire ratings for acoustic products
ASTM E84 classes, and what to ask for.
2 minute read · Updated Nov 2026