Knight-Celotex is proud to announce SoundStop® is now UL certified for the 1-hour fire rating in a load bearing wall system when installed behind drywall.  Our SoundStop® wall design is U387, details can be found on www.UL.com in their certifications directory.

1-Hour Fire Rating U387 Report

1-Hour Fire Rating U387 Design

Knight-Celotex SoundStop® deadens sound transfer from:

Neighbor to neighbor: Shared walls and corridors.

Room to room: Noise-generating media rooms, workshops, laundries, and children’s bedrooms and playrooms; offices and conference rooms.

Outside in: Dogs barking, traffic and industrial noises, and airplanes.

Easy to afford SoundStop® adds great sale/resale value to single and multi-family home owners. Multifamily home owners benefit from SoundStop® by significantly deadening noise transfer through neighbors’ shared walls and corridors.

Nationally available SoundStop® achieves STC ratings of 42 and better when installed behind drywall.

SoundStop® is your earth friendly choice. The 1/2” x 4’ x 8’ or 9’ square edged fiberboard sheets are made of 97% organic materials including recovered hardwood or sugar cane fibers and a supporter of the Green Building Initiative™ (GBI). Read about SoundStop® in HIE!

Check with code officials in your area. SoundStop® must be installed behind drywall.