The National Fire Protection Association has established standards which designate fire safety ratings that apply to many types of products. Section 6-5.3 of the NFPA 101 Life Safety Code, entitled "Interior Wall and Ceiling Finish Classification," establishes the rating metrics which apply to sound reduction treatment products designed to be mounted to the surface of a wall or ceiling. Products are tested in fire chambers and evaluated based on the spread of the flame and the amount of smoke produced. Treatments complying with the highest standard of fire resistance, approved as Class A, are appropriate in public areas such as schools, restaurants and churches. A Class A fire rating is assigned to finishes with a flame spread of 0 to 25 and a smoke density ranging from 0 to 450.
Like many other products, soundproofing treatments intended for use in public areas must conform to specific requirements aimed at protecting public safety. Melamine foam and fiberglass treatments are popular for use in public places due to their soundproofing effectiveness as well as their Class A fire classification. For instance, fiberglass constructed baffles are effective for sound absorption and adhere to NFPA Class A fire rating standards.
Anyone implementing a sound reduction treatment in a public facility must take into consideration the fire classification of the products to be used. Even products labeled "fire-retardant" do not necessarily meet the standards to be classified as Class A. Some products are effective for sound reduction but do not carry a Class A fire rating, as is the case with polyurethane foam treatments. With a flame spread of 375 and a smoke density of 140, polyurethane foam products are not suitable for use in a public area requiring a Class A fire code.
Although fire classifications must be considered for sound reduction products aimed at improving acoustics in public buildings, all soundproofing projects have unique circumstances that must be addressed. For instance, polyurethane foam products, though inappropriate for use in areas of high heat or flame, remain an excellent soundproofing option for residential applications. Polyurethane foam is a cost effective solution for use in areas such as private studios or drum booths. Due to the highly individualized nature of sound reduction needs, it is advised to consult with a soundproofing specialist who can provide consulting based on your unique application.
About the Author: Mark Rustad is President of NetWell Noise Control, based in Minneapolis, MN. Founded in 1991, NetWell is a leading supplier of soundproofing products, sound reduction treatments, and online acoustical consulting services. NetWell’s sound management skills are packaged into the industry’s premier website. Discover first hand why so much of NetWell’s business stems from the referrals and repeat orders they receive from satisfied clients around the world.
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