Ardex UI 720 Flexbone ​​Floating Uncoupling Membrane​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

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Product Details

Product Details

Ardex UI 720 Flexbone ​​Floating Uncoupling Membrane​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

Ardex introduces the first 100% floating uncoupling membrane for tile installation. This loose-laid floating system allows separation from the underlying substrate, saving time on surface preparation if the substrate is not suitable for a bonded membrane. The unique bone-shaped pattern with GripLock Technology allows the highest level or mortar-to-membrane bond strength. The Flexbone roll consists of a versatile, flexible plastic and a laminated, topside glass fiber mesh that is self-sticking for overlaps and easy seam connection. The membrane also contains more than 1,000 perforations per square foot for improved vapor pressure equalization.


  • Coverage: 215 sq. ft. (20 m²)
  • 39" wide x 65.6' long (1 m x 20 m) roll
  • 1/8" (3mm) Uncoupling Mat
  • True 100% floating uncoupling membrane
  • Use with porcelain, ceramic, quarry and natural stone tiles
  • Up to 50% time savings without surface preparation
  • Helps prevent grout joint and tile damage
  • Vapor pressure equalization
  • Perfect for use over difficult substrates: Vinyl and linoleum floor coverings, existing and cracked tile, contaminated substrates: oil, paint, etc
  • Ideal for frequently-changed floor coverings
Questions & Answers
3 questions

What is the coverage in sq. ft. per roll?

This roll will cover 215 sq.ft. (20 sq. m).

What is the smallest tile you can set on this membrane?

Ceramic tile size must be a minimum of 8” x 8” x 3/8” (20.3 cm x 20.3 cm x 10 mm). Porcelain tile must be a minimum of 8” x 8” x 5/16” (20.3 cm x 20.3 cm x 8 mm) and natural stone must be a minimum of 8” x 8” x 9/16” (20.3 cm x 20.3 cm x 15 mm).

Can this be used with radiant heat?

No, the Ardex UI 720 FLEXBONE cannot be used with radiant heat. That mat is not designed thick enough like FLEXBONE Heat UH 900, which is specifically engineered for heat.

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