Deep Fill Underlayment

Low Density Fill™


  • Innovative, ultra-lightweight product
  • Ideal for deep fill applications and structural weight limitations
  • Up to 80% lighter than concrete
  • No thickness limitation
  • Fast drying—ready for topping the next day

Application
Multifamily and light commercial wood frame and concrete construction as part of a subfloor system.

Subfloor
Interior wood, concrete.
Technical Data
Installation DepthsNo thickness limitation
Compressive StrengthTypical range of 200 - 500 psi
(1.38 - 3.45 MPa)
Dry Density28-32 lb./ft.³ (449-513 kg/m³)
Packaging40 lb. bag
Work Time10–30 min.
Storage Temperature50 - 100° F (10 - 38° C)
Coverage1/2 in. thickness: 36 ft.² (3.34 m²)
1 in. thickness: 18 ft.² (1.67 m²)
2 in. thickness: 9 ft.² (0.84 m²)
3 in. thickness: 6 ft.² (0.56 m²)
Installation Temperature50° F (10° C) for at least 24 hours prior to installation
Trade TrafficFoot traffic 6–12 hours
Fire Performance (ASTM E84)Flame Spread – 0
Fuel Contribution – 0
Smoke Development – 0


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