Adding additional layers of drywall can improve the stc rating of an assembly.
Stc roof assembly.
Ul v487 ulc w482 cul v487.
A proprietary roof deck assembly that consists of a lightweight sandwich of sound absorptive shredded wood panel rigid insulation and roof board provides sound absorption on the interior space.
Toughrock fireguard c products densarmor plus fireguard c products.
Moisture resistant assemblies aesthetic assemblies sa932 sa933 sheetrock gypsum panels submittal sheet wb1473 usg area separation walls.
The stc rating shown reflects testing or evaluation of an assembly with one or more products under test conditions and may not apply to all products listed for each assembly.
Metal stud walls perform better than wood stud walls.
Helpful documents and resources for usg s roof assemblies can be found on this page.
Staggered or double stud walls are higher rated than single stud walls.
Refer to our roof ceiling assembly documents which includes ul fire rated roof assemblies for easy guidance through the assembly of a roof or ceiling on your next project.
50 stc with single layer designs have achieved up to 4 hr.
By itself this system provides a relatively low level of sound isolation stc 31 and does not fully prevent rain noise from being audible in the interior space.
Insulation will noticeably improve the stc rating of an assembly.
Resilient channel can improve the stc rating of an assembly.