Blanke Permat Uncoupling Tile Underlayment

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The Blanke PERMAT is an innovative uncoupling tile underlayment that offers added support to wood substrates thereby reducing deflection and provides greater compression and tensile strength than plastic tile underlayment roll products. The Blanke PERMAT is stable to walk on during installation and does not require additional curing time when installing porcelain with latex modified thinset.


  • Strengthens wood substrates
  • Reduces vertical subfloor movement (deflection)
  • Superior compressive strength
  • Superior tensile strength
  • Crack isolation properties (uncoupling)
  • Superior resistance to delamination during installation
  • No extended cure time for latex modified thinset mortars under porcelain tile
  • Lightweight; easy to install
  • Self-seaming panels prevent substrate movement stress from transmitting to tiled surface
  • 1/8" thick
  • Permanent Support of high quality floorings - ex: stone, marble
  • Assures HIGHEST protection for your construction project

Technical Data

  • Top Mesh: Extruded twisted strands of highly alkali resistant glass fiber heat welded to the lower layer of high-density polyethylene (HDPE) mesh.
  • Bottom Mesh: Extruded twisted strands of HDPE
  • Fabric Material: Polypropylene fleece
  • Thickness: Approx 3.3mm (1/8")

Floors Interior - Plywood or OSB Subfloors

  • Joists spaced 16" o.c. and 19.2" o.c. : Minimum 3/4" thick subfloor
  • Joists spaced 24" o.c.: Minimum 3/4" thick subfloor plus second layer of 3/8" thick plywood or OSB

Floors Interior - Cement Subfloors

  • Permat provides excellent protection against damage caused by stress cracks and lateral movement typically found in cement substrates.


  • Permat has a 10-year warranty against damage caused by excessive vertical subfloor movement (deflection), the only such warranty in the industry. Whether installing stone on wood or cement subfloors, homeowners who include Permat in their stone and tile installations can rest assured their subfloors will indeed support the installation.


  • 1 sheet is 6.5 sq ft. Each sheet of Permat is 2' x 3' 2".
  • 1 full carton is 195 sq ft. Each carton is 30 sheets.

Please select whether you want to order per sheet or a whole carton from the options above.

When ordering per sheet, select the 'Per Sheet' option and add the quantity of sheets you need in the quantity box.

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