Applegate Insulation

Applegate Press Briefings

Cotton Armor Acoustical Insulation Earns High STC Rating

New Sound Transmission Class (STC) testing, conducted by Applegate Insulation, reveal an environmentally sustainable, energy saving option for reducing noise pollution in buildings that have party walls.

Noise pollution is an overlooked health hazard, which may increase susceptibility to heart disease, hypertension and result in many harmful effects such as hearing loss, tinnitus, increased stress and sleep deprivation. According to the National Research Council Canada (CNRC), "For most types of sound, the benefits of sound insulation only occur for STC ratings substantially above STC 50." and, "An effective STC of 55 is therefore recommended as a realistic goal and STC 60 as a more ideal goal for party wall sound insulation.".

The new sound transmission testing shows that Cotton Armor™ Acoustical and Thermal Blanket insulation meet the CNRC recommendations with the below ratings for party walls which are commonly found in condominiums, rental units, meeting or conference rooms, hospitals, schools, hotels, apartments, home theaters, offices and commercial buildings:
Cotton Armor is an excellent choice for reducing sound transmission through walls, ceilings and floors.
An R-19 Cotton Armor insulated wall: 59 STC
with two layers of Cotton Armor:         62 STC

An R-13 Cotton Armor insulated wall: 57 STC
with two layers of Cotton Armor:         60 STC

The higher the STC rating the better the sound deadening ability of the material. (Above party wall STC ratings were calculated according to ASTM E-90 testing for sound transmission loss in double 24” o.c. wood stud walls with one 5/8th inch layer type X gypsum on each side.)

Cotton Armor is an unique 21st century insulation hybrid, which utilizes the ancient insulating and acoustical properties of cotton that is coupled with a proprietary technologically cutting-edge fiber layering process. Because Cotton Armor is made from recycled cotton fibers it is as comfortable, non-irritating and as safe to use as your favorite pair of jeans. Additionally, it is sized for 16" o.c. and 24" o.c. residential and commercial framing, which combined with its unique layering reduces compression, gaps and voids that can significantly decrease acoustical and thermal performance. Cotton Armor blanket insulation is both easier to properly size and to install, than yester-years batts. Consequently, its reduced installation time and enhanced acoustical & thermal performance are welcomed by both installers and building operators.

Even when used in a single wall configuration, Cotton Armor delivers extraordinary acoustical performance:

An R-13 Cotton Armor insulated wall has a 52 STC
An R-19 Cotton Armor insulated wall has a 53 STC
An R-21 Cotton Armor insulated wall has a 54 STC

(Single wall STC ratings were calculated according to ASTM E-90 testing for sound transmission loss in 24" o.c. steel stud walls and one 5/8th inch layer of type X gypsum on each side.)

Established in 1978, Aaron and his son Terry Applegate began manufacturing cellulose insulation out of a small facility in Okemos, Michigan. Today, Applegate headquartered in Webberville Michigan, is the largest privately-owned cellulose insulation manufacturer in the world, and supplies a variety of insulation products throughout the United States. Applegate currently operates facilities in Michigan, Wisconsin, Pennsylvania, Kentucky, Georgia, Louisiana, and Colorado. For additional information regarding Cotton Armor insulation please visit

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