STC, Rw and OITC measure different things. Compare test methods, target values by room type, and why the numbers are not interchangeable.
STC vs Rw vs OITC: Sound Ratings Compared (With Examples) Read More »
How ISO 10140 testing and ISO 717-1 single-number Rw ratings work, and how EU/UK/AU buyers should read a lab report.
ISO 10140 & Rw Ratings: Lab Sound Insulation Explained Read More »
How ASTM E90 lab testing produces an STC rating, operable vs non-operable results, and why field performance (ASTC) is usually lower.
ASTM E90 & STC Ratings: How Lab Sound Tests Work Read More »
Seal gaps, add mass and upgrade the slab in the right order. Costs, expected STC gains and when replacing the door beats retrofitting it.
How to Soundproof an Existing Door: 7 Methods That Work Read More »
