Since the inception of Gypsum Floor Masters, we have focused our expertise around four key business services. We don't try to be all things to all people. Instead, we focus on being the best at the specialized services we provide.

We install the best products and deliver the best service when we it comes to installing Firm-Fill gypsum concrete, waterproofing, soundproofing or hardrock concrete.

No other single company can provide all the services we provide without having to outsource. This means that when you work with Gypsum Floor Masters, you deal directly with only one responsible company for all these building needs. Having just one responsible vendor will make your jobs run smoothly and will reduce your delivery time.

This peace of mind is a huge benefit that we are proud to provide. We guarantee our work and are proud of the 25 years we have been delivering not just outstanding products, but we've been delivering on our promises as well. This is something you will realize the first time you work with us.

FIRM-FILL Gypsum Concrete

The original FIRM-FILL® Gypsum Concrete floor underlayment is designed for use in multi-family housing to satisfy acoustical ratings and fire codes. With excellent STC and IIC ratings as well as over 86 UL listings, FIRM-FILL® Gypsum Concrete floor underlayment is an excellent choice for jobs needing compressive strengths up to 2000 psi.

recommended applications

  • Multi-family housing
  • Condominiums
  • Apartment buildings
  • Townhomes

features and benefits

  • Flattens subfloors
  • Provides excellent STC (sound transmission) and IIC (impact isolation) ratings
  • Possesses over 86 UL listings
  • Lightweight and crack resistant
  • Easily installed; over 40,000 square feet can be installed per day
  • Quick drying; can be walked on in 90 minutes
  • Expert application; installed only by trained, licensed applicators
  • Approvals from ICC-ES and HUD
  • Meets ASTM F2419, standard practice for the installation of thick-poured gypsum concrete underlayments and the preparation of the surface to receive resilient flooring