Users' questions

What is a good STC for a window?

What is a good STC for a window?

Sound Transmission Class (STC) STC is used to measure a window’s ability to reduce sound. The higher the rating, the better the sound control. The typical rating for single pane windows is 18-20 while a double glazed window is 28-32.

What is a good STC rating for walls?

For multi-family construction, the minimum IBC code is STC=50. However STC=60+ is recommended for party walls in higher quality construction such as hotels, townhomes, condos, and certainly quality home theaters. The FHA recommendations for Luxury Grade 1 dwellings are also 55 to 60.

What is a good STC rating for floors?

The higher the number, the higher the resistance – the better. To meet International Building Code – both IIC and STC need to meet the minimum of 50 to pass. Many larger luxury condo associations and municipalities are now looking at the higher 50’s and lower 60’s range.

Is STC 36 good?

Things to note: STC rating of 25 is what can be easily heard. STC rating of 38-42 is considered good soundproofing for residential. STC rating of 50-65 is professional, commercial soundproofing for recording studios, etc.

What is the STC rating of laminated glass?

Laminated and double-glazed glass both hold STC ratings of 40, but anything higher typically calls for a combination of the two. Maximum noise insulation is achieved by laminating one or more lites in a double-pane piece.

What STC rating do I need?

What is the STC rating of 5/8 drywall?

between 30-34
With two sheets total, of 5/8” drywall utilizing standard insulation we often see STC ratings ranging between 30-34. With two total sheets of ½” drywall (common for residential interior walls) we usually see an STC rating of around 33.

What does STC 35 sound like?

When we say STC-35, it means the enclosure, wall partition or door reduce noise by 35 decibels. A sound reduction of 35 decibels is very high. Most similar soundproof enclosures on the market reduce noise by only 15 to 25 decibels.