FIRM-FILL® 2010+

FIRM-FILL® 2010+

For use over wood subfloors, FIRM-FILL® 2010+ floor underlayment is the product of choice. It stiffens the subfloor to eliminate squeaks and nail pops and provides a solid floor while remaining safe for the environment. FIRM-FILL® 2010+ floor underlayment creates additional surface hardness and compressive strengths up to 3200 psi.


Recommended For


Features & Benefits

  • FIRM-FILL® 2010+ floor underlayment is designed for installation over wood subfloors
  • Stiffens the subfloor to eliminate nail pops and squeaks
  • Creates a smooth, flat, crack-resistant surface
  • Compressive strengths from 2000 - 3200 psi
  • Rapid installation; up to 25,000 square feet installed per day
  • Quick drying; FIRM-FILL® 2010+ floor underlayment can be walked on in 90 minutes
  • Expert application; installed only by trained, Licensed Applicators
  • FIRM-FILL® 2010+ floor underlayment has approvals from ICC-ES and HUD
  • Meets ASTM F2419, Standard Practice for the Installation of Thick Poured Gypsum Concretes and Preparation of the Surface to Receive Resilient Flooring


External Resources

Sweets ProductTAG
CAD Details


Product Resources

Key: Word PDF Web Page
Product Submittal
3-Part Specifications
Project References
Drying Conditions Flyer
Post-Pour Instructions
Guidelines for Finished Floor Coverings

Featured Application

The Promenade at Founders Square in Portage, IN
The Mansfield High End Apartments in Los Angeles, CA


Technical Data
Weight 7.2 lbs/ft2 at 3/4" (19 mm) C472M
Thickness 3/4" (19mm) (minimum over wood) to 3 1/2" (89mm)  
Compressive Strength 2000 - 3200 psi C472M
Thermal Performance K-value of 2.8 Btu/ft2·h·°F; R-value of 0.36 ft2·h·°F/Btu C177
Fire Hazard Classification Flamespread index 0; Fuel Contribution 0; Smoke Density 0 E84,
Patty Size 8 1/2" (216mm) plus or minus 1/2" (13mm) in diameter  
Sand 1/8" (3mm) or less washed plaster or masonry sand E11
UL listings Listed in over 100 1, 2, 3 and 4 hour floor/ceiling assemblies