FIRM-FILL® CMD (Corrugated Metal Decking)

GYP-SPAN® Radiant is a gypsum concrete floor underlayment designed specifically for use over radiant heating systems. It encases the hot water tubes or electrical cables without air bubbles, creating a superior thermal mass that provides uniform heat transfer. GYP-SPAN® Radiant floor underlayment is the energy efficient and cost-effective way to create a smooth, flat, evenly heated floor surface for the attachment of virtually any finished floor covering.

Recommended For

Corrugated Metal Decking Application/Market

Multi-family, commercial projects, & industrial buildings.

Features & Benefits

  • Lightweight solution for fast-track construction
  • Ideal for multi-family and mid-rise commercial applications
  • Economical solution to build higher, faster, and lighter
  • Creates a smooth, flat, rock-solid surface for the installation of finished floor coverings
  • UL listed for 1, 1-1/2, and 2-hour fire-resistance per UL G565, G568
  • Quick drying; can be walked on in 90 minutes
  • Expert application; installed only by trained, Licensed Applicator

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
Technical Data Properties ASTM
Weight Minimum 12.8 lbs/ft2 (62.47 kg/m2) at 1-9/16″ (40mm) C472M
1″ (25mm) above the flutes
Compressive Strength Minimum 3500 psi C472M
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