A rolled-up blue Thermosphere ultimate mat with a patterned underside, shown partially unrolled on a plain white background.
A bright blue Thermosphere ultimate mat shown partially unrolled from a roll on a plain white background.
A person's arm is visible as they unroll a large roll of blue and white Thermosphere ultimate mat over a gray floor mesh on a white wall background.
A close-up of a bright blue Thermosphere ultimate matting with a repeating circular pattern, overlaid with three vertical yellow heating cables.
A close-up of a person's hand fixing the yellow Thermosphere ultimate heating cable into place on the ultimate matting
A close-up of a person's hand wearing a red work glove, pressing down on Thermosphere ultimate yellow heating cables to place it into the ultimate matting.
A close-up of a hand using a grout float to place Thermosphere Ultimate heating cable into place on the ultimate matting.
A close-up of a hand connecting a yellow heating wire to a blue electronic pad or sensor on a white surface.
A close-up of a person's hand fixing a yellow heating wire into a blue Thermsophere ultimate mat with a small black component near the top left, against a white background.
A close-up of a person's hand using a trowel to apply tile adhesive over a blue Thermosphere ultimate mat with yellow and black heating cables.
Close-up of a blue Thermosphere ultimate mat with a raised grid pattern, partially covered by wet gray self levelling compound, with yellow heating cables visible along the bottom.
A blue and green striped L-shaped bath mat on a white tiled bathroom floor, positioned in front of a white freestanding bathtub and a gray floor drain, with a tile cutout showing the Thermosphere Ultimate underfloor heating in place.
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A rolled-up blue Thermosphere ultimate mat with a patterned underside, shown partially unrolled on a plain white background.A bright blue Thermosphere ultimate mat shown partially unrolled from a roll on a plain white background.A person's arm is visible as they unroll a large roll of blue and white Thermosphere ultimate mat over a gray floor mesh on a white wall background.A close-up of a bright blue Thermosphere ultimate matting with a repeating circular pattern, overlaid with three vertical yellow heating cables.A close-up of a person's hand fixing the yellow Thermosphere ultimate heating cable into place on the ultimate mattingA close-up of a person's hand wearing a red work glove, pressing down on Thermosphere ultimate yellow heating cables to place it into the ultimate matting.A close-up of a hand using a grout float to place Thermosphere Ultimate heating cable into place on the ultimate matting.A close-up of a hand connecting a yellow heating wire to a blue electronic pad or sensor on a white surface.A close-up of a person's hand fixing a yellow heating wire into a blue Thermsophere ultimate mat with a small black component near the top left, against a white background.A close-up of a person's hand using a trowel to apply tile adhesive over a blue Thermosphere ultimate mat with yellow and black heating cables.Close-up of a blue Thermosphere ultimate mat with a raised grid pattern, partially covered by wet gray self levelling compound, with yellow heating cables visible along the bottom.A blue and green striped L-shaped bath mat on a white tiled bathroom floor, positioned in front of a white freestanding bathtub and a gray floor drain, with a tile cutout showing the Thermosphere Ultimate underfloor heating in place.

ThermoSphere Decoupling Membrane 5m² Roll (HDM-005)

ThermoSphere
Size: 5 sqm Roll
Price:
£77.99

Description

The ThermoSphere Decoupling Membrane 5m² (HDM-005) is a fleece-backed polyethylene membrane engineered as the installation substrate for the ThermoSphere Ultimate heating cable, and as a stand-alone anti-fracture layer beneath ceramic, porcelain and natural stone tiles.

Key Benefits

  • Fleece-backed polyethylene membrane, 5.5mm thick
  • Neutralises lateral movement to minimise cracking and delamination
  • Provides a waterproof layer when combined with ThermoSphere waterproofing products
  • Compatible with ThermoSphere Ultimate heating cable at 130W/m² or 195W/m²
  • Suitable for both heated and unheated tiled floors
  • Robinson test rated for extra heavy use

Applications

Ideal for tilers, bathroom fitters and wetroom installers preparing floors in bathrooms, kitchens, hallways and living areas before tiling, with or without underfloor heating.

Performance & Features

Adhered to the substrate with a flexible tile adhesive, the membrane's dimpled structure decouples the tile finish from movement in the substrate below, reducing the risk of cracked grout and lifted tiles.

Compatibility

Works with the full range of ThermoSphere Ultimate cable sizes (HDMC-012 to HDMC-200) and with ThermoSphere waterproofing paste and tape for a fully tanked floor build-up.

Supplied by Millcot, your trade source for ThermoSphere underfloor heating and floor preparation systems.

Downloads

FAQs

Can I use this without underfloor heating cable?
Yes, HDM-005 works as a standalone anti-fracture and decoupling layer under tiles even without heating cable installed.

What adhesive should I use?
Bed the membrane in a flexible, polymer-modified tile adhesive suitable for movement-prone substrates.

Is it waterproof on its own?
The membrane alone is not a certified tanking system; use with ThermoSphere Waterproofing Paste and Tape to create a waterproof layer for wetrooms and showers.

Does it work over timber floors?
Yes, provided the timber substrate is stable and suitable for tiling; always follow the datasheet installation guidance.