K.E.
McNURNEY,inc.
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Drywall & Interior Plaster FAQ |
GLOSSARY OF SOUND CONTROL TERMS Attenuation: Reduction in sound level. Cavity: A space between wall studs or attic joists where insulation is typically installed. Faced Insulation: Insulation with an attached vapor retarder (Kraft or foil-backed paper). Fiber glass Insulation: An energy-efficient glass fiber product. Foil-Faced Vapor Retarder: Created by coating a foil-backed paper with a thin layer of asphalt adhesive. The coated side of the foil-backed paper is then applied to the unfaced insulation material. The asphalt adhesive bonds the foil-backed paper and the insulation together. Joist: Horizontal wood framing member set from wall to wall to support the boards of a floor or ceiling. Kraft-Faced Vapor Retarder: Created by coating Kraft paper with a thin layer of asphalt adhesive. The coated side of the Kraft is then applied to the unfaced insulation material. The asphalt adhesive bonds the Kraft and the insulation together. Loudness: The subjective response to a sound level. Noise: Unwanted, bothersome, or distracting sound. R-Value: Insulation materials have tiny pockets of trapped air. These pockets resist the transfer of heat through material. The ability of insulation to slow the transfer of heat is measured in R-values. An "R" is a measure of insulating power. The higher the R-value, the better the insulation material's ability to resist the flow of heat through it. RC1 Resilient Channels: Metal channels used to further inhibit sound transmissions from wood studs through the drywall. Resilient channels are typically nailed or screw applied perpendicular to vertical wall studs or ceiling joists. Sound Transmission Class: A single number rating that indicates the sound transmission loss of a partition or ceiling system between adjacent closed rooms, abbreviated STC. Sound Transmission Loss: The reduction in sound level when sound passes through a partition or ceiling system. Stapling Flange: A protruding edge on faced insulation used to staple the insulation to the studs. (to the inside, not the face of the stud or joist) Stud: An upright 2 x 4 or 2 x 6 wall framing member. Unfaced Insulation: Insulation with no attached vapor barrier. Vapor Retarder: Helps control the amount of moisture passing through the insulation and collecting inside exterior walls, ceilings and floors.
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