Roof Soundproofing Stc

Sound transmission class stc is an integer rating of how well a building partition attenuates airborne sound in the usa it is widely used to rate interior partitions ceilings and floors doors windows and exterior wall configurations see astm international classification e413 and e90.

Roof soundproofing stc.

Double layer of drywall stc 38. Bathrooms and laundry rooms. The boards can be installed in either vertical applications in a wall or horizontally in floor roof assemblies. Utilizing insulation decoupling mass and damping all together gives you the highest soundproofing performance usually 30 stc points over a standard wall ceiling.

This method reduces airborne sound but hardly does anything for impact noise. Stc or sound transmission class is defined as the level of reduction of sound transmission from outside noise sources to the building interior. Any reputable product that is marketed as a good soundproofing material will include. When installed in a wall assembly the low density foam layer serves as a decoupling layer reducing the sound transmission.

Higher stc numbers mean higher resistance to sound transmission to the building interior or as acousticians would describe it higher stc means greater sound transmission loss between outdoors and the building interior. Owens corning 2 thick soundproofing insulation has a density of 10 lb ft and claims it will add an stc of 18 to your uninsulated wall with an stc of 35 to bring it to an stc of 53. The material is best used when it is not compressed or packed. Utilizing insulation mass and damping will give you solid sound control usually about 80 noise reduction if done correctly.

Sound transmission class stc a commonly used measure of soundproofing effectiveness is the sound transmission class or stc. Sound insulation sound insulation are batts made of mineral wool rock wool and fiberglass designed to fit in between the studs of walls. It is a single number that attempts to characterize the overall ability of a material to reduce the transmission of noise. The stc value utilizing this matrix of fiberglass and a single layer of 5 8 drywall is 36 stc.

Sound transmission class the decibel db is used to express sound intensity or loudness the more intense a sound the higher the db level the sound transmission class stc is a numerical rating of the ability of a wall floor ceiling assembly or any other building element such as a door or window to minimize sound transmission. Acoustic foam this material commonly called studio foam has a distinctive wedge or pyramid shape that is highly effective at absorbing sound. It has an nrc rating of 1 0 performing better at the upper test frequency than the lower end so low frequency noise is still an issue. An assembly comprised of gypsum board steel studs and rockwool safe n sound insulation will produce an stc rating of 52 while an assembly comprised of gypsum.

The stc rating is not indicative of the number of decibels db that will be reduced but represents a means of specifying materials for acoustical wall assemblies that will provide the required noise reduction i e. At 38stc this matrix is denser and does more for airborne noise.