Underlayment - How to choose the right underlayment

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Choosing the Right Underlayment Product

Seven Hacker Underlayment brands available to meet virtually any construction need:

FIRM-FILL® Gypsum Concrete underlayment - This underlayment provides fire-resistance and sound control in multi-family applications.
FIRM-FILL® 2010 underlayment - Use this underlayment over wood subfloors where additional surface hardness is needed.
FIRM-FILL® 3310 underlayment - Use this underlayment when an exceptionally smooth and rock-solid surface is required.
FIRM-FILL® High Strength underlayment - This underlayment is for use over cast-in-place or precast concrete to provide a level, crack-resistant surface.
FIRM-FILL® 4010 underlayment - This underlayment is the economical solution for thin capping of damaged or uneven concrete.
FIRM-FILL® CMD - This underlayment is designed for light-gauge steel frame construction with a corrugated galvanized steel deck.
GYP-SPAN® Radiant underlayment - This underlayment provides even heat distribution over hydronic or electric heating floor systems.

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

R= Recommended O= Optional

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