Cerazorb® Underlayment

Underlayment System for Radiant Floors

• Ideal for installation below radiant floor heat
• Insulates cold subfloors
• Up to 25 times lighter than 1/4" backerboard
• Excellent acoustical and crack suppression
• Lightweight, only 0.07 lbs. per SF
• Easily manageable 2'x4' sheets lay flat and true
• Synthetic cork material will not rot, support mold
  and mildew, or absorb moisture
• Very stable, heat and cold resistant
• High energy impact, with low weight
• Remains unchanged after repeated impact loads
• VOC free and environmentally friendly
• Economically priced and readily available

Under Tile, Stone or Marble		Under Floating Laminate or Wood
Installation Overview Set tile and stone over any acceptable subfloor. Bond Cerazorb to the subfloor with latex-modified thin-set mortar. Use a 1/8" x 1/8" x 1/16" V-notched trowel. Roll with a 35 lb. roller. See detailed installation instructions.		1 Top vapor barrier required for film heating systems only. 2 A water-proof sealer or vapor barrier is required below Cerazorb on slab subfloors where the calcium chloride test exceeds 3 lbs. per 1,000 SF in 24 hours. Install (float) flooring layers as shown above. Duct tape Cerazorb seams together. Lay second row with seams staggered to first row.
Cerazorb Technical Data
R-Value: 1.5		Weight: .07lbs. per S.F.
Thickness: 5mm (3/16")		TCNA Robinson Test: Light commercial
Sheet Size: 2' x 4'		Acoustic testing: Wood frame construction: IIC 53 6" slab no ceiling: Δ IIC = 20; Field FIIC = 59 (7" slab)