Choosing the Right Underlayment Product

Hacker Industries, Inc. supplies a full line of poured floor underlayments and sound control mats that are unrivaled in their quality and consistency. With billions of square feet installed, Hacker Floor Underlayments are the premier underlayment solution for new construction, renovation and repair projects.

FIRM-FILL® Brand Gypsum Concretes
FIRM-FILL® branded products are used to achieve fire-ratings, sound attenuation and leveling over wood, concrete and corrugated steel substrates. They have been successfully used in a wide variety of applications, including apartments, condominiums, hotels, motels, dormitories, assisted living and commercial construction.

GYP-SPAN® Brand Radiant Underlayments
GYP-SPAN® branded products are specially formulated for use in conjunction with radiant heating systems. They limit void space around the radiant elements and maximize the efficiency of the radiant systems. These products have been successfully used in both single family and multi-family construction.

TRUE-SCREED® CLU
TRUE-SCREED® Branded products are hydraulic cements, which provide a cost-effective method to transform cracked, uneven concrete floors into a smooth, strong surface for finished floor coverings. These products are ideal for any indoor, underlayment application that does not allow for gypsum-based concretes.

Type of
Subfloor
Recommended
PSI
FIRM-
FILL®
Gypsum
Concrete
FIRM-
FILL®
2010+
FIRM-
FILL®
3310
FIRM-
FILL®
3310+
FIRM-
FILL®
High
Strength
FIRM-
FILL®
4010
FIRM-
FILL®
CMD
GYP-
SPAN®
Radiant
TRUE-
SCREED®
CLU
Type of Building: Multifamily
Wood-new 1200-2500 psi R R R R
Wood-renovation 1500-2500 psi O R R R
Concrete-new 2500-5500 psi O O O R O O
Concrete-renovation 2500-5500 psi O O R R O
Corrugated Steel Deck Min. 3500 psi R
Radiant heating 2000-3200 psi R
Type of Building: Single-Family
Wood-new 1200-3300 psi R R R R
Wood-renovation 1500-3300 psi O R R R
Concrete-new 2500-5500 psi O O R O
Concrete-renovation 2500-5500 psi O O R R
Radiant heating 2000-3200 psi R
Type of Building: Commercial
Wood-new 1500-3300 psi O R R R
Wood-renovation 1500-3300 psi O R R R
Concrete-new 2500-5500 psi O O O R O O
Concrete-renovation 2500-5500 psi O O R R R
Corrugated Steel Deck Min. 3500 psi R
Radiant heating 2000-3200 psi O
R= Recommended      O= Optional