Question 1

What is Mass Loaded Vinyl (MLV) and how does it work?

Accepted Answer

Mass Loaded Vinyl is a dense, flexible soundproofing membrane designed to block airborne noise and dampen structure-borne vibration. It works by adding mass to wall, floor, or ceiling assemblies, which reduces sound transmission. The more mass, the harder it is for sound waves to pass through. MLV is particularly effective when installed in multi-layer wall systems where it can raise STC ratings from standard levels to 50-70+.

Question 2

What's the difference between MLV Lite, Regular, and Pro?

Accepted Answer

MLV Lite (0.6 lb/ft², 1/16" thick) is our lightweight option ideal for metal-stud walls and budget-conscious projects with an STC of 21. MLV Regular (1 lb/ft², 1/8" thick) is our industry-standard product suitable for most commercial and residential applications with an STC of 26. MLV Pro (1 lb/ft², 3/16" thick) features scrim reinforcement for enhanced durability and performance, adding 3-5 STC points over standard barriers, making it ideal for high-noise environments and professional installations.

Question 3

How much MLV do I need for my project?

Accepted Answer

Measure the total square footage of the surfaces you want to soundproof (walls, ceilings, or floors). Add 10-15% extra to account for overlapping seams (2" overlap recommended) and cuts around outlets, doors, and windows. Our MLV rolls cover 100 sq ft each (4' x 25'). Use our coverage calculator on each product page for a quick estimate, or call us at (888) 815-9691 and we'll help you figure out exactly what you need.

Question 4

Will MLV completely soundproof my room?

Accepted Answer

MLV significantly reduces noise transmission, but no single product creates total silence. Results depend on your wall assembly, existing construction, and the type of noise. Adding MLV to a standard wall can improve STC ratings by 5-10+ points — that's a noticeable difference. For best results, combine MLV with proper sealing, decoupled framing, and insulation. Our team can recommend the right setup for your specific situation.

Question 5

Which underlayment thickness should I choose?

Accepted Answer

It depends on your flooring type and noise reduction goals. The 2mm is ideal for laminate and engineered hardwood where minimal height addition is needed. The 3mm works well for most standard installations. The 5mm is great for luxury vinyl plank (LVP) and areas needing extra cushion. The 10mm offers maximum acoustic performance and is best suited for multi-family buildings or high-traffic commercial spaces.

Question 6

Can I use floor underlayment with radiant heating?

Accepted Answer

Yes, our 2mm, 3mm, and 5mm underlayments are compatible with radiant heating systems. However, always verify compatibility with your specific heating system manufacturer. The 10mm underlayment, while offering superior acoustic performance, may reduce heat transfer efficiency due to its thickness and density. For best results with radiant heat, we recommend the 3mm or 5mm options which balance acoustic performance with thermal conductivity.

Question 7

Can underlayment be used under tile or carpet?

Accepted Answer

Our underlayment products are designed primarily for floating floors like laminate, engineered hardwood, and luxury vinyl plank. For tile installations, a different type of acoustic membrane is typically required. For carpet, the underlayment can work but a traditional carpet pad may be more appropriate. Contact our team for recommendations specific to your flooring type.

Question 8

Can I install MLV myself or do I need a professional?

Accepted Answer

MLV is a DIY-friendly product. Most homeowners with basic construction skills can install it successfully. The key tools you'll need are a utility knife, staple gun, measuring tape, and acoustical caulk. The material is heavy but flexible, so having a helper makes the job easier. We provide detailed installation guides for every product on our website.

Question 9

How do I install MLV in my walls?

Accepted Answer

MLV is typically installed behind drywall during construction or renovation. For new construction, hang the MLV between studs using a staple gun or adhesive, overlap seams by 2 inches, and seal all seams and edges with acoustical caulk. Then install your drywall over the MLV. For existing walls, you can remove one side of drywall, install the MLV, and replace the drywall. Always ensure proper sealing around outlets, switches, and penetrations for maximum effectiveness.

Question 10

Do I need to overlap the seams?

Accepted Answer

Yes, overlapping seams by at least 2 inches is critical for maximum sound blocking. Any gaps or unsealed seams will allow sound to leak through, significantly reducing the effectiveness of your installation. Use acoustical caulk or seam tape at every joint, edge, and penetration point.

Question 11

Can MLV be installed on ceilings?

Accepted Answer

Absolutely. MLV is commonly installed on ceilings to block noise from upper floors. The installation method is similar to walls — attach the MLV to ceiling joists using adhesive or mechanical fasteners, overlap seams, seal with acoustical caulk, and finish with drywall. Due to the weight, ceiling installations may require additional support or a helper.

Question 12

Do you ship partial rolls or custom cuts?

Accepted Answer

We ship full rolls only to maintain product quality and competitive pricing. MLV products ship in 4' x 25' rolls (100 sq ft), and floor underlayments ship in 4' x 30' rolls (120 sq ft). If you need custom cuts or have a large commercial project requiring special dimensions, please contact our sales team at (888) 815-9691 to discuss your requirements.

Question 13

How long does shipping take?

Accepted Answer

Standard shipping typically takes 5-7 business days within the continental United States. Expedited shipping options are available at checkout. Large orders or commercial projects may have adjusted timelines — contact us for a specific estimate. All orders include tracking information sent via email.

Question 14

Do you offer free shipping?

Accepted Answer

We offer competitive flat-rate shipping on all orders. For large commercial orders or bulk purchases, please contact our sales team at (888) 815-9691 for custom shipping quotes. We work with freight carriers to ensure your materials arrive safely and at the best possible rate.

Question 15

What is your return policy?

Accepted Answer

We accept returns of unopened, undamaged rolls within 30 days of delivery. The product must be in its original packaging. Return shipping costs are the responsibility of the buyer. Please contact our support team at (888) 815-9691 to initiate a return and receive a return authorization number before shipping.

Mass Loaded Vinyl Direct

Frequently Asked Questions

Mass Loaded Vinyl

Floor Underlayment

Installation

Ordering & Shipping

Ready to Order? Shop Our MLV Lineup

MLV Lite — 0.6 lb/sf

MLV Regular — 1 lb/sf

MLV Pro — 2 lb/sf

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