Acoustics
Acoustical sound mat installation in Utah
Sound mat under the gypsum concrete is what gets a floor to the STC and IIC ratings between units. We install it and pour over it in one scope.
Quieter floors between units
In a wood-frame building, footsteps and voices travel through the floor. A sound attenuation mat under the gypsum concrete breaks that path. Paired with the right gypcrete thickness and ceiling assembly, it brings the floor up to the STC and IIC ratings your drawings call for.
We install USG SAM sound mats from 1/8" to 3/8" and larger, and we price thickness options side by side so you can weigh cost against performance.
Getting the layout right
Sound mat usually goes under hard flooring, not carpet. During takeoff we check the floor-ceiling details, the enlarged unit plans, the finish schedule and any interior design sheets. If the drawings don't agree, we flag it before bid day so there are no surprises in the field.
Sound mat FAQ
What do STC and IIC mean?
STC (Sound Transmission Class) rates how well a floor-ceiling assembly blocks airborne noise like voices and TVs. IIC (Impact Insulation Class) rates footsteps and dropped objects. Building codes set minimums for both between dwelling units.
Which sound mat thickness do I need?
It depends on the rating your assembly needs, the flooring on top and how much height you have. Thicker mats raise IIC but add thickness, which affects toilet flanges, drains, stair heights and door clearances. We'll price options side by side.
Does sound mat go under carpet areas too?
Usually not. Sound mat is typically required under hard surfaces like LVP, LVT and tile, while carpet and pad help with impact noise on their own. We check the finish schedule and interior design sheets during takeoff so the mat goes where the hard flooring goes.
Have a project out to bid? Send plans to Bids@knellconstruction.com or call (801) 274-1178.
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