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 Carpet Underlayment |
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TECHNICAL SPECIFICATION |
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SOUNDOWN’S Acoustic Carpet Underlayment is an important part of a boat's sound reduction package. This easy to install product can be used at any point in the insulation process. Carpet underlayment is effective as a primary treatment for living areas of the boat, such as solons or staterooms where flooring is the dominant source of moise in situations where it is difficult to install proper engine room insulation. Underlayment products consist of a foam layer supporting an acoustic vinyl barrier. The foam layer acts to decouple the mass layer from the floor vibrations,
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creating an effective barrier against noise radiating from the floor due to structureborne or airborne sources of noise excitation.
Carpet underlayment is also very effective as part of a full insulation package. In cases where greater attenuation levels are required, carpet underlayment will improve upon the engine room insulation system. Not only will the carpet underlayment add a second decoupled mass, but it will also seal areas such as hatches where leakage can take place. |
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| Material Configuration
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| Materials |
Total Thickness |
Foam |
Mass Layer |
2 lb.ft, sq 1/2" |
3/4 inch |
1/2 inch thick |
2 pounds per square foot |
2 lb.ft, sq 1/4" |
1/2 inch |
1/4 inch thick |
2 pounds per square foot |
1 lb.ft, sq 1/2" |
5/8 inch |
1/2 inch thick |
1 pound per square foot |
1 lb.ft, sq 1/4" |
3/8 inch |
1/4 inch thick |
1 pound per square foot |
.5 lb.ft, sq 1/2" |
9/16 inch |
1/2 inch thick |
1/2 pound per square foot |
.5 lb.ft, sq 1/4" |
5/16 inch |
1/4 inch thick |
1/2 pound per square foot |
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| Barrier Foam Composits |
| The Material |
Foams |
Mass Layer |
| There are a number of formats for this product, each one consisting of one of the foams listed with a mass loaded vinyl layer bonded to the top. |
Charcoal 1/4" and 1/2"
- Soft underfoot feel compatible with softer carpeting
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The mass portion of this material is a mass loaded vinyl, with a reducted slippage embossed surface, in densities from 1/2 lb. to 2 lb. per square foot. |
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Premium grade 1/4" & 1/2 "
- Feel compatible with carpets requiring a firmer support.
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Closed cell 1/4" & 1/2"
- For use under all weather carpeting in areas of the boat that get wet.
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| Typical Physical Properties |
| Thickness |
1/4 to 3/4 |
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Stiffness, MPA
(Barrier)
ASTM 749 |
19.60 |
| Weights (per ft2) |
.55 lbs. to 2.2 lbs. |
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Tensile, PSI
(Barrier)
ASTM D 412 |
407 |
| Flammability, foam UL 94 HF-1 MVSS 302 |
In Testing, Call for Data |
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Elongation, %
(Barrier)
ASTM D 412 |
120 |
Specific Gravity
(Barrier)
ASTM D 798 |
1.80 |
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Tear, lbs/1"
(Barrier)
ASTM D 624 |
77 |
Hardness
(Barrier)
Shore A 2
ASTM D 2240 |
90 Nominal |
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Temp. Range, Fahrenheit (Composite) |
-40 to 255 degrees |
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| Enhanced Noise Reduction due to Carpet Underlayment |
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| For a Printout of the Carpet Underlayment Specification Sheet in pdf format, click here |
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