|
STC Rating |
Description of
Performance |
|
30
35 |
Loud speech
understood fairly well
Loud speech audible but unintelligible |
|
42
45
|
Loud speech
audible as a murmur
Must strain to hear loud speech |
|
48
50
|
Some loud speech barely audible
Loud speech not audible |
Quiet Comfort
A
quiet home is relaxing and serene - with a peaceful aura of quality and
solitude. Homeowners realize that unwanted noise affects comfort,
concentration, and behavior. That is why it is crucial to insulate the
ceilings, walls, and floors with a material that effectively controls
sound.
And since noise
from within the home can be equally disagreeable, it is a good idea to
insulate interior walls and floors — so that several people or groups
can simultaneously enjoy different activities (such as watching TV,
reading, and using the computer). Controlling noise is clearly
important, but how can a homeowner or builder know which insulation is
best at keeping a home quiet?
Tested
The best way to determine effectiveness is to conduct reliable,
scientific tests. Sound Transmission Class (STC) is a laboratory
measurement used to study the resistance of a wall, ceiling, or floor to
the passage of sound. The higher the STC number, the more sound is
deadened. The table below gives examples of STC ratings.
|
Open Cell Foam Insulation |
Performance |
|
ASTM E 413-87 |
Sound
Transmission Class (STC) 39 |
|
Closed
Cell Foam Insulation |
Performance |
|
ASTM E 413-87 |
Sound
Transmission Class (STC) 37 |
| Cellulose Insulation |
Performance |
|
ASTM E 413-87 |
Sound Transmission Class
(STC) 49 |
| Fiber Glass Insulation |
Performance |
|
ASTM E 413-87 |
Sound Transmission Class
(STC) 39 |
| Empty Walls |
Performance |
|
ASTM E 413-87 |
Sound Transmission Class
(STC) 33 |
|
Open Cell Foam/Cellulose Combination |
Performance |
|
ASTM E 413-87 |
Sound Transmission Class
(STC) 51 |
The Winner
As you can see, testing shows that Foam/Cellulose design quiets a
home better than fiberglass or spray foam. This is due to the
porosity of the two materials in separate layers. We have
found that the two materials complement each other in ways not
previously tested.
Custom Fit Every
Time
Different installation methods dramatically affect how well noise is
controlled. Fiberglass batts leave gaps and voids since they are cut and
patched to fit the countless variations throughout a home. Open Cell Spray
Polyurethane Foam Insulation and Cellulose together completely fills the spaces in walls and
ceilings. This application helps to reduce the sound
transmittance because it is sprayed in and provides a
custom fit around wiring, plumbing, and other obstacles. A Real
Improvement For Every Home Spray Foam Insulation and Cellulose together
will help keep your home quiet and energy effect. This results in
a quitter more comfortable environment.
Ideal For
Multifamily & Commercial Use.
In situations where sound control is even more critical, Spray
Polyurethane Foam Insulation and Cellulose has proven extremely
effective.
———————————
Sources (1) “Noise Control Design Guide”, Owens-Corning Fiberglas Corp.
(2) “Noise Control Design Guide”, Owens-Corning Fiberglas Corp. (3)
Spray Polyurethane Foam Alliance. |