Poor product quality control
We are writing to let you know of the terrible experience we had with the Quiet Barrier MLV we purchased from your company. We received the product in December and Saturday 1/3/26, we attempted to install it. The instructions were confusing because one page said to leave a 1/4 gap on the MLV Another instruction web page said to leave the 1/4 gap on the drywall going over the MLV. We called twice to customer support to clarify to be sure we got it correct. We proceeded to mark 1/4 gap around the parameter of our wall. When we went to hang the first 4x8 piece of MD MLV, we could not get the sides to line up with the ceiling. Steve checked the square of our ceiling and walls and we were in line. Then we checked the sheets of MLV and discovered they were ALL cut diagonally! Pictures are attached that show our ceiling and walls are square but not the sheets!! Being Saturday late afternoon, and we missed the 15 day return because our drywall contractor was out of the country for a holiday, we decided to try and square them ourselves. That said, it took us the rest of Saturday to square the sheets. We were able to successfully hang them on Sunday once squared. This wasted a whole day. This was totally unacceptable as EVERY sheet was off! One sheet was not even the full 96" when we had to trim it to be square!! Then, the seam tape was supposed to be 96" and was only 94"! When you buy a drywall or panel that says 4x8, you expect it to be 4x8 square! Your company has TERRIBLE quality control. We picked your company because it was in the USA and veteran and woman owned. However, this product has given that and your company a bad reputation.
By Sj
Response from Soundproof Cow· Jan 5, 2026
Good afternoon, Joyce and Steve, We will again apologize for the issues you are experiencing with the material from your recent purchase; our team has discussed this extensively because we have never received feedback such as this. The material typically has small deviations in size and length within acceptable tolerances which is an industry standard. We have not had customers tell us of size / installation issues in the past, and we are again sorry to hear that you encountered this with your order. We will be addressing this with our quality control team and our internal operations to ensure this issue does not happen again. We strive to meet our customers' expectations and are typically flexible with our return policy. We will again ask at this stage of your project, are there any questions that we can answer or assistance that we can provide? Please do not hesitate to let us know. The Soundproof Cow Team