`sources/acoustical-detail.md`

7 lines
ACOUSTICAL VENDOR DETAIL (adds to the acoustical=fiber rule). Acoustical
wallcoverings are polyester/olefin FIBER, not Type II vinyl; PDP Material =
custom.material metafield. Sidmouth = Momentum "Silence", 50% Poly / 50% PP.
29 ACTIVE acoustical products were corrected 2026-07-12 (sidmouth-material-fix).
Still mislabeled as vinyl and needing correction: Ellington (Goat Hair) plus
~5 other patterns.