STC RATINGS FOR VARIOUS WALL ASSEMBLIES Page 1 of 3 ...
STC RATINGS FOR VARIOUS WALL ASSEMBLIES Page 1 of 3 ...
STC RATINGS FOR VARIOUS WALL ASSEMBLIES Page 1 of 3 ...
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<strong>STC</strong> Ratingshttp://www.stcratings.com/assemblies.html<strong>Page</strong> 1 <strong>of</strong> 32/22/2007<strong>STC</strong> <strong>RATINGS</strong> <strong>FOR</strong> <strong>VARIOUS</strong> <strong>WALL</strong> <strong>ASSEMBLIES</strong>Below are the <strong>STC</strong> ratings <strong>of</strong> various wall assemblies, each presented to help illustrate concepts, improvements andrules <strong>of</strong> thumb. The estimated ratings are based on laboratory test results from various compendiums <strong>of</strong> <strong>STC</strong> ratings.It is recommended to consult a pr<strong>of</strong>essional acoustician for more detailed information or to analyze the specifics <strong>of</strong>your project/assembly.To view different wall assemblies, click on each point below that may apply to your project.1. Insulation will noticeably improve the <strong>STC</strong> rating <strong>of</strong> an assembly.2. Staggered or double stud walls are higher rated than single stud walls.3. Metal stud walls perform better than wood stud walls.4. Resilient channel can improve the <strong>STC</strong> rating <strong>of</strong> an assembly.5. Adding additional layers <strong>of</strong> drywall can improve the <strong>STC</strong> rating <strong>of</strong> an assembly.6. Drywall between double studs can dramatically reduce the <strong>STC</strong> rating <strong>of</strong> an assembly.1. Insulation will noticeably improve the <strong>STC</strong> rating <strong>of</strong> an assembly.DescriptionEstimated <strong>STC</strong>RatingWall Assembly3 5/8" metal studs, 5/8" gyp (2 layers total),No insulation38 - 403 5/8" metal studs, 5/8" gyp (2 layers total),Batt insulation43 - 44back to top2. Staggered or double stud walls are higher rated than single stud walls.DescriptionEstimated <strong>STC</strong>RatingWall Assembly2x4 stud, 5/8" gyp (2 layers total),Batt insulation34 - 39Staggered studs, 5/8" gyp (2 layerstotal),Batt insulation46 - 472x4 studs, 5/8" gyp (2 layers total),Batt insulation56 - 59
<strong>STC</strong> Ratingshttp://www.stcratings.com/assemblies.html<strong>Page</strong> 2 <strong>of</strong> 32/22/2007back to top3. Metal stud walls perform better than wood stud walls.(NOTE: This only applies to single stud assemblies. For double stud assemblies, there is virtually no difference.)DescriptionEstimated <strong>STC</strong>RatingWall Assembly2x4 stud, 5/8" gyp (2 layers total), Battinsulation34 - 393 5/8" metal studs, 5/8" gyp (2 layers total),Batt insulation43 - 44back to top4. Resilient channel can improve the <strong>STC</strong> rating <strong>of</strong> an assembly.(NOTE: These ratings are based on laboratory tests. Because <strong>of</strong> the special care required when installing resilientchannels, actual results could be substantially lower.)DescriptionEstimated <strong>STC</strong>RatingWall Assembly2x4 stud, 5/8" gyp (2 layers total), Battinsulation34 - 392x4 stud, 5/8" gyp (2 layers total), ResilientChannel, Batt insulation45 - 52back to top5. Adding additional layers <strong>of</strong> drywall can improve the <strong>STC</strong> rating <strong>of</strong> an assembly.DescriptionEstimated <strong>STC</strong>RatingWall Assembly2x4 stud, 5/8" gyp (2 layers total), Battinsulation34 - 393 5/8" metal studs, 5/8" gyp (3 layers total),Batt insulation39 - 402x4 stud, 5/8" gyp (4 layers total), Battinsulation43 - 45back to top
<strong>STC</strong> Ratingshttp://www.stcratings.com/assemblies.html<strong>Page</strong> 3 <strong>of</strong> 32/22/20076. Drywall between double studs can dramatically reduce the <strong>STC</strong> rating <strong>of</strong> an assembly.DescriptionEstimated <strong>STC</strong>RatingWall Assembly2x4 studs, 5/8" gyp (4 layers total), Battinsulation44 - 452x4 studs, 5/8" gyp (2 layers total), Battinsulation56 - 592x4 studs,5/8" gyp (3 layers total), Battinsulation59 - 602x4 studs, 5/8" gyp (4 layers total), Battinsulation58 - 63back to topRules <strong>of</strong> ThumbRecommended RatingsWeaknesses - What You Should KnowThe difference between <strong>STC</strong> and NRC<strong>STC</strong> Ratings for Masonry WallsHomeCopyright © 2004 Acoustics.com
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