![]() Proflex 90 is the leading choice in soundproof membranes for subfloors. Tested according to regulations set by the American Society for Testing and Materials Standards E90-02, E989-89 and E492-90, Proflex 90 testing was done on an 8” concrete slab with an acoustic ceiling. Now for the technical stuff: Proflex 90 has an Impact Insulation Class (IIC) rating of 68 and a Sound Transmission Class (STC) rating of 72. This can develop into a major problem when you’re renovating, but with Proflex 90, there’s no need to trim doors or waste time doing additional work just to include awesome sound insulation in your project or home. Because it’s 90 mils, DIYers only add a little bit of height to their floor.
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