Radiant Heat

Building Type
Product	LEVELROCK® RH™ Floor Underlayment	LEVELROCK® Commercial RH™ Floor Underlayment
Description	For use with radiant heat systems designed to meet the requirements of the Radiant Panel Association, this fast-applying gypsum cement provides an efficient thermal mass to maximize the effectiveness of the radiant heat system. Also available in green formulation using FGD recaptured gypsum.	Fast-applying formulation for electrical and hot water radiant heat floor installations under commercial-grade floor coverings. Non-shrinking, it locks tubing in place, preventing noise and tube chafing. Special formulation prevents the temperatures associated with radiant heat floors from breaking down the floor matrix over time.
Physical Properties
	RH™ Floor Underlayment	Commercial RH™ Floor Underlayment
Strength (psi)	2,500-3,500^a	3,500-4,500^a
Density, dry (lbs./cu.ft.)	115	120
Weight (lbs./sq.ft. at 3/4" thickness)	7.2 (14.4 at 1-1/2" thickness^b)	7.5 (15.4 at 1-1/2" thickness^b)
	RH™ Floor Underlayment	Commercial RH™ Floor Underlayment
Single Family	•
Multifamily	•	• High traffic
Light Commercial	•	• High traffic
Commercial / Retail Office		• Light traffic
Hotel / Motel	• Light traffic	• High traffic
Institutional
Warehouse
Subfloor Type
	RH™ Floor Underlayment	Commercial RH™ Floor Underlayment
Plywood	•	•
Heavy Wood Plank	•	•
Corrugated Deck
Concrete	•	•
Concrete Plank	•	•
Concrete Repair / Leveling		•
Radiant Heat

Notes:
(a) Tested according to ASTM C472.
(b) Tested according to ASTM C109 modified.