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What is STC?
STC stands for Sound Transmission Class. STC ratings are the official way to measure noise reduction through a partition (such as a wall or in this case, a window). It is roughly equivalent to the “dB’s” lost through a partition. For typical windows, STC ratings range from 18 to 27. Windows are typically submitted to independent labs for STC evaluation, and follows the test method in ASTM E90. STC ratings are the only way to compare products. Quiet Solution has years of experience designing and manufacturing the highest STC products for major builders throughout North America. We have hundreds of lab and field STC tests of our products proven performance. Many independent lab tests are available on our website.
What are typical STC ratings of windows?
Single pane windows typically have an STC rating of 15-24. Some older metal framed windows that don’t seal properly can be under 10. Typical STC Ratings for dual pane windows from most manufacturers range from 24 to 29, unless specified higher by the builder or homeowner. QuietHome Windows are available from STC 33 to STC 44, depending on configuration. They are not applied over an existing window, but are actual high-tech engineered windows for replacement or new construction.
What is the difference between QuietHome Windows and other “soundproof” windows?
Most “soundproof” windows are either windows which are placed inside or outside your house as an addition to your existing window, or are 4-track windows (where the homeowner opens 2-sets of windows each time). Many people find these alternatives unsightly and unusual looking. QuietHome windows are engineered using advanced technologies in glass, frame, and seal design that allow us to provide the highest STC windows within a typical frame width, thus they look and operate just like regular windows. Nothing detracts from the beauty of the home.
What does STC mean in terms of actual noise reduced?
Every 10 STC points reduces noise by 50%. Lets assume your current windows are single pane STC 20. Replacing those with STC 30 windows will reduce the noise by 50%. Replacing those with STC 40 windows will reduce the noise by 75%.
More Noise Reduction?
QuietHome windows offer the highest STC ratings of any windows available today. As one installs windows at STC 40 for instance, the walls may become the source of more sound transmission (average walls in homes are only STC 34-38). Fortunately, Quiet Solution manufactures QuietRock soundproof drywall, which can add up to 20 STC points to existing walls. See the Quiet Solution website for more information.
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