ThermoSphere Underfloor Heating Decoupling Membrane Mat – Sizes 1 m², 5 m² & 15 m²
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ThermoSphere Underfloor Heating Decoupling Membrane Mat – Sizes 1 m², 5 m² & 15 m²
The ThermoSphere Underfloor Heating Decoupling Membrane Mat is a patented polypropylene membrane designed to provide a combined electric heating, decoupling, waterproofing, load-bearing, and vapour management solution for tiled and stone floors. Available in 1 m², 5 m², and 15 m² sizes, this membrane simplifies installation and enhances the durability and comfort of your underfloor heating system.
Key Features
- Patented polypropylene membrane with a unique dimpled surface that forms channels to securely hold ThermoSphere heating cables at variable spacing, enabling heat output customization (130W/m² or 195W/m²)
- Fleece backing for excellent bonding to substrates such as concrete, plywood, or screed, ensuring stability and strong adhesion
- Combined decoupling layer neutralises stress caused by substrate movements, minimising tile delamination and cracking
- Waterproof membrane provides protection against moisture ingress, ideal for wet rooms, bathrooms, and damp substrates
- Load bearing rated for heavy traffic areas as certified by Robinson test — suited for domestic and commercial use
- Vapour management properties allow water vapour to escape effectively, enabling quicker installation over partially cured substrates
- IP68 rated system when combined with ThermoSphere heating cables, suitable for wet areas
- Lifetime warranty for long-term peace of mind
Available Sizes
| Product Size | Dimensions (mm) | Thickness | Coverage Area | Installation Format |
|---|---|---|---|---|
| 1 m² | 1000 x 1000 | Approx. 5.5 mm | Single square panel | Sold per individual m² panel |
| 5 m² | 1000 x 5000 | Approx. 5.5 mm | Roll, suitable for larger floor areas or custom layouts | Flexible cut-to-fit roll |
| 15 m² | 1000 x 15000 | Approx. 5.5 mm | Large roll ideal for extensive heating installations | Flexible cut-to-fit roll |
Technical Specifications
- Voltage: 230V 50Hz
- Output options via cable spacing: 130W/m² (3 dimples apart) or 195W/m² (2 dimples apart)
- Membrane Material: Waterproof, durable polypropylene
- Insulation Fleece: Anchors membrane securely to substrate and manages vapour diffusion
- Total Thickness: Approximately 5.5 mm
- Protection Rating: IP68 when combined with ThermoSphere cables
- Robinson Test Rating: Extra Heavy Duty (suitable for heavy foot traffic and commercial applications)
- Warranty: Lifetime
- Compatible with ThermoSphere TwistedTwin heating cable technology
Installation Guidelines
- Ensure substrate is clean, dry, and stable before laying membrane
- Roll out membrane over the area to be heated and cut to size as required for the layout
- Press heating cables firmly into the membrane’s dimple channels at desired spacing according to heat output needs
- Use fleece backing to bond membrane securely to substrate, ensuring no movement
- Suitable for use over concrete, screed, plywood, or uncured substrates due to vapour management properties
- Follow all relevant electrical and building regulations for underfloor heating installations
Why Choose ThermoSphere Decoupling Membrane?
This membrane mat combines innovative design and robust materials to provide a multi-functional solution that protects your floor finish while delivering efficient, warm floors. Its ease of installation and integrated waterproofing and decoupling features make it a preferred choice for professional installers and DIY enthusiasts alike, ensuring durable and comfortable heated floors that stand the test of time.
Available now in 1 m² panels, 5 m², and 15 m² rolls – suitable for all sizes of underfloor heating projects.
Please note: Delivery times may vary depending on location, with specific details outlined below.
Standard Delivery
UK Mainland
- Delivery Time: 2–4 working days
- Free Delivery on all orders
Express Delivery
UK Mainland
- Delivery Time: 1–3 working days
- Delivery fee of £15
Channel Islands
- Postcodes Covered: GY*, IM*, JE*
- Minimum Order: £50
- Delivery Fee: £70
Northern Ireland, Offshore Territories & Scottish Islands
- Postcodes Covered: BT*, HS*, KW, ZE
- Minimum Order: £50
- Delivery Fee: £35
Same Day Delivery
- Eligible Postcodes:
E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW* - Minimum Order: £50
- Same Day Delivery Fee: £60
- Special Requests or Locations:
For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.
Collections
Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.
Collection address: 284 Water Rd, Unit 9, London, HA0 1HX
- Type Electric Underfloor Heating
- Vendor ThermoSphere
- SKU HDM-001