The weave also allows the vinyl to resonate or move with the sound. The weaving of MLV also aids in the defusing of sound waves. In the case of a horizontal weave (the most common weave) it is best to overlap the seams by at least 1″ and seal that overlap with acoustical caulking as well as a quality seam tape.
The key to weaving MLV (or any barrier material) is to seal the vinyl as best as possible at the seams and around the perimeter. This picture gives you a rough idea of how this would look. If you are constructing new walls using the staggered stud method, it would be beneficial to actually weave the vinyl in and out of the staggered stud assembly itself. There is not a lot of information on the Internet in regards to the installation of mass loaded vinyl, hopefully we will be able to separate the fact from fiction. It is always better to pick up these materials at the source whenever possible. Shipping on the 2 LB mass loaded vinyl can also be a factor. A lot depends on your soundproofing issues. Obviously the 2 Lb would be more effective (32STC) as opposed to (26 STC) for the 1lb, but it is more costly and that extra cost may not be necessary. You have a choice of 1lb or 2lb mass loaded vinyl.
MASS LOADED VINYL ON CEILING INSTALL
For more information on installing mass loaded vinyl over existing drywall, please call or e-mail us before you purchase or install this material. This can be accomplished with the use 1″ furring channels that will allow the MLV to resonate between 2 layers of drywall. It should never be sandwiched between layers of drywall unless you can provide a dead air space where in the MLV can resonate or move with the sound waves. The MLV works well when placed on a wall or ceiling in a membrane fashion. This method is known as the membrane or septum method. The standard of the industry is to install the MLV directly to the stud or joist framing using an industrial stapler or heavy-duty roofing nails that have the large plastic heads. There is more than one method for installing mass loaded vinyl to obtain maximum effect.
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