5/27/2023 0 Comments Mass loaded vinyl 1lbAt half the weight, and around $1/SF, lighter mass loaded vinyl like this performs only 1 STC point lower in lab tests on metal wall stud assemblies than 1 lb/sf MLV. Using 0.6 lb/sf or 0.5 lb/sf mass loaded vinyl is most cost-effective option when used on metal stud wall assemblies. Benefits of Light Weight MLV & When to Use This scrim layer allows for more decoupling between rigid surfaces, helping to mitigate more vibrational noise. If the wall will need to reduce sound transmission of more vibrational and low frequency sound, or if you’ll be installing MLV on existing drywall, you should use 1 lb/sf MLV with a polyester scrim. When using 1 lb/sf MLV on wood studs, you can usually achieve an STC rating in the 40’s, but on metal studs, it can help you hit STC 55+. The heavier and thicker the MLV, the better it is at also reducing low frequency sound transmission from mechanical and other similar noises.ġ pound mass loaded vinyl is most often used for wall soundproofing in both commercial and residential settings. People often use 2 lb/sf MLV when soundproofing extremely loud areas such as mechanical rooms. Weightġ lb/sf MLV With Polyester Scrim ( Wall Blokker PRO)Ģ lb/sf mass loaded vinyl is by far the heaviest, thickest and most expensive version of MLV. Also, different weights and thicknesses of MLV each have their own unique purpose either in certain wall assemblies or on their own. Mass Loaded Vinyl STC Ratingsĭifferent weights and thicknesses of mass loaded vinyl’s have different STC ratings. We won’t get into the science behind that here, but just keep this in mind when considering wall and floor soundproofing using sound membranes. For example, if you have a wall assembly with an STC rating of 33, you can’t add a later of MLV with an STC of 26 to result in a wall with an STC of 59, it would be more like 39. And, contrary to popular belief, STC ratings of materials don’t just add up normally. While there are a lot of materials that have their own STC ratings, they can also combine in the form an STC rated wall or floor/ceiling assembly. Some low STC rated products include glass windows and hollow-core doors, while some high STC rated products include mass loaded vinyl and solid-core doors. The STC rating, or Sound Transmission Classification rating, of a material correlates to the amount of sound that a material is able to block.
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