Pipe and Duct Lagging quiets noisy pipes

Frequently Asked Questions

Q: What does a pipe wrap product do?

Our pipe & duct wrap reduces the amount of noise that transmits through the walls or casing of ductwork, steel or PVC piping, valves, sheet metal enclosures, VAV units and fans.

Q: In what ways is Sound Seals acoustical lagging different than duct liner?

Our lagging is wrapped around the outside surface of ducts or pipes and eliminates the "breakout noise" which is the noise that radiates from the walls of the duct/pipe as air or other materials pass through it. Acoustical Liners are installed inside the duct or pipe and abate the noise heard at the intake/outlet vents.

Q: Do I really need a pipe or duct wrap?

Our lag products are wrapped around the outside of ducts or pipes and stop the noise, while our Liners are installed inside the duct or pipe. The two types of products are generally used in conjunction with one another.

Q: Is this Sound Seal product the same as the flexible, foil-faced fiberglass duct?

No. A foil faced fiberglass duct does not include the loaded vinyl noise barrier, the key ingredient for noise abatement. The Lagging products are a foil-faced Barrier bonded to a quilted fiberglass decoupler.

Q: How much quieter will my pipe or duct be?

When installed properly our B-10 LAG/QFA-3 or B-10 LAG/QFA-9 would have a decibel drop of 10 dB to 15 dB, depending on what the dominant frequency is in the particular application. The tables at the bottom of the technical datasheets show the Laboratory test transmission loss values at individual 1/3-octave bands. Also included is the STC rating so end users can use this when evaluating products.

Q: Why does the 2” material really measure less than that?

The fiberglass that is used in the manufacture of the product, and is the industry standard, is a true 2” thick before it is run through the quilting process. The quilting process serves several purposes, which includes changing the contour of the fiberglass; thereby increasing it’s sound absorption properties. It is common for the B-10 Lag/QFA-9 material to be less than 1 ½” thick when the quilting process is finished. Packaging the material adds further to the compactness of the product, especially when it is rolled for packaging.

Q: Can you explain the differences in Sound Seal's pipe wrap products?

Our B-10 Lag is a 1 Lb psf loaded vinyl noise barrier featuring a reinforced foil facing this facing readily accepts a our matching lag tape. B-10 Lag is most often used when a duct or pipe is already wrapped with standard thermal insulation.

B-10 LAG/QFA-3 is the same product as the B-10 Lag with a one-inch thick quilted fiberglass decoupler bonded to the back of the noise barrier. The quilted fiberglass decoupler augments the comprehensive noise reduction performance of the the B-10 LAG/QFA-3.

B-10 LAG/QFA-9 has the same B-10 LAG barrier as above with a two-inch thick quilted fiberglass decoupler bonded to the back of the noise barrier. The quilted fiberglass decoupler improves the overall noise reduction performance of the product, especially at lower frequencies.

Our B-20 LAGging has a 2 Lb per square foot noise barrier.

B-20 LAG/QFA-3 has a 2 Lb per square foot noise barrier with a 1" quilted fiberglass decoupler.

B-20 LAG/QFA-9 has a 2 Lb per square foot noise barrier including a 2" quilted fiberglass decoupler.

Q: Does Sound Seal's lagging products have an R-value?

Yes: Our pipe and duct wrap with a fiberglass decoupler has an R-value of 4 per inch of thickness.

Q: Can you use these products outdoors?

Sound Seal's BBC products, with their inherently UV resistant barrier, are suitable for use in the roughest outdoor environments. Or you can cover Sound Seal's lagging products with an aluminum sheathing to be used in an outdoor environment.

Q: Is your lagging material fire retardant?

The term "Fire retardant" does not apply to our products. We are required to test our products to the “Surface Burning Characteristics of Building Materials” (ASTM E84), which measures both flame spread and smoke development

Q: Where can I buy the product?

Many insulation wholesale distributors have our lagging products. In the event your current insulation distributor does not have our product we can ship directly to your distributor, your warehouse, or your job site.