MAXKOSKO Uncoupling Membrane for Floor Warming, Waterproofing & Crack Prevention
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Description
Uncoupling Membrane for Electric Floor Heating Cable
MAXKOSKO Electric Floor Heating Uncoupling Membrane combines heating cable management, tile crack protection, waterproofing support, and load distribution in one underlayment system.
The raised stud pattern securely holds compatible electric floor heating cables with diameters from 3.8 to 5.0 mm. Installers can route the cable directly into the membrane channels without separate clips or fasteners, helping create customized heated zones beneath tile floors.
Unlike standard tile underlayment membranes, this product is specifically designed to work with loose electric floor heating cable while also helping reduce stress transfer between the subfloor and finished tile covering.
Looking for an uncoupling membrane without heating cable channels? Compare our basic non-adhesive membrane , self-adhesive membrane , or double-fleece membrane .
Built-In Cable Channels
The raised stud pattern securely holds compatible electric floor heating cable without separate clips or fasteners.
3.8–5.0 mm Cable Compatibility
Designed for many loose electric floor heating cables within the specified diameter range.
Custom Heating Layouts
Route the cable through the membrane channels to create heating zones based on the room layout.
Uncoupling Protection
Helps reduce stress transfer caused by minor movement between the substrate and tiled surface.
Waterproof Membrane
The polyethylene-based construction helps protect moisture-sensitive substrates when properly sealed.
Load Distribution
Mortar-filled cavities help transfer loads evenly from the tile covering to the supporting substrate.
Important Before Ordering
Confirm Your Floor Heating System
Heating Cable Size: Use only compatible electric floor heating cable with an outside diameter between 3.8 and 5.0 mm.
Loose Cable Systems: The membrane channels are designed to hold loose heating cable. Confirm compatibility before using heating mats, foils, or other heating products.
Membrane Only: Heating cable, thermostat, floor sensor, mortar, and tile are not included unless specifically stated in the selected product option.
Do Not Cut the Heating Cable: Plan the heated area and cable spacing according to the heating cable manufacturer’s instructions. Never shorten or modify a fixed-length heating cable unless expressly permitted.
Electrical Installation: Heating cable resistance, insulation, grounding, sensor placement, and electrical connections must follow the heating system instructions and applicable electrical codes.
Subfloor Condition: The substrate must be structurally sound, flat, clean, and suitable for a mortar-bonded tile installation.
Designed for Heated Tile Floors
This membrane provides a dedicated installation surface for loose electric floor heating cable while maintaining the uncoupling and waterproofing functions required beneath many tiled floors.
Secure Cable Placement
The cable presses between the raised studs and remains positioned while mortar and tile are installed.
No Separate Fasteners
Built-in channels reduce the need for cable clips, straps, or additional fastening accessories.
Flexible Heating Zones
Loose cable can be routed around permanent fixtures and focused in areas where floor warmth is needed.
Low-Profile Assembly
The approximately 0.22-inch membrane thickness helps limit added floor height beneath the tile assembly.
Applications
MAXKOSKO Heating Cable Uncoupling Membrane is intended for interior electric floor heating installations beneath compatible tile coverings.
- Heated bathroom and shower-area tile floors
- Kitchen and dining area floor warming
- Basement and laundry room tile floors
- Entryways, mudrooms, and other cold tiled areas
- Residential renovation and new construction projects
- Ceramic, porcelain, and approved natural stone tile
- Properly prepared plywood, OSB, concrete, and approved substrates
Application Limits
Floor Use: This membrane is primarily designed for floor heating applications beneath tile.
Wet Areas: A complete waterproof assembly requires proper sealing of seams, corners, penetrations, and floor-to-wall transitions.
Floor Covering Compatibility: Confirm that the selected tile, mortar, heating cable, and substrate are approved for use together.
Specifications
| Product Type | Electric Floor Heating Uncoupling Membrane |
| Primary Use | Securing Loose Electric Floor Heating Cable Beneath Tile |
| Compatible Cable Diameter | 3.8–5.0 mm |
| Membrane Thickness | Approximately 0.22 in (5.5 mm) |
| Material | HDPE and PP Composite Construction |
| Installation Method | Mortar-Bonded to the Prepared Subfloor |
| Heating Cable Retention | Raised Stud and Channel Design |
| Main Functions | Cable Management, Uncoupling, Waterproofing Support, Vapor Management and Load Distribution |
| Compatible Tile Types | Ceramic, Porcelain and Approved Natural Stone Tile |
| Typical Substrates | Concrete, Plywood, OSB and Other Approved Tile Substrates |
| Self-Adhesive Backing | No |
| Heating Cable Included | No, Unless Specifically Stated in the Selected Option |
Compare MAXKOSKO Uncoupling Membranes
This heating membrane is designed for a different purpose than the three standard tile underlayment options. Choose it when the project includes loose electric floor heating cable.
| Product | Key Design | Best For |
| Basic Tile Underlayment Mat | Standard non-adhesive uncoupling membrane | Economical crack protection for general tile floors |
| Self-Adhesive Uncoupling Membrane | Peel-and-stick backing | Faster installation without mortar beneath the membrane |
| Double-Fleece Uncoupling Membrane | Fleece bonding layers on both sides | Enhanced mechanical bonding and vapor management |
| Electric Floor Heating Uncoupling Membrane | Raised channels that retain loose heating cable | Electric heated tile floors using 3.8–5.0 mm cable |
Quick Selection Guide
Choose the Basic Membrane: For economical tile crack protection without adhesive or heating cable channels. View Product
Choose the Self-Adhesive Membrane: For faster peel-and-stick floor preparation. View Product
Choose the Double-Fleece Membrane: For mortar-based installation with reinforced mechanical bonding. View Product
Choose the Heating Cable Membrane: When the tile floor will include compatible loose electric floor heating cable.
Basic Installation Overview
Apply compatible thin-set mortar to the prepared subfloor and embed the membrane into the fresh mortar. Press the heating cable into the designated channels according to the approved cable layout, then cover the system with suitable mortar and install the tile.
Installation Notes
Test the Cable: Measure and record cable resistance before installation, after placing the cable, and before installing the finished flooring.
Protect the Cable: Do not nick, crush, overlap, cross, or sharply bend the heating cable.
Sensor Placement: Install the floor sensor between adjacent cable runs without allowing it to touch or cross the heating cable.
Do Not Use Self-Leveling Compound Over the Membrane: Complete any required floor leveling before installing the membrane unless the relevant system manufacturer specifically approves another method.
Follow System Instructions: Always follow the heating cable, thermostat, mortar, tile, and membrane installation requirements.
Frequently Asked Questions
What size heating cable fits this membrane?
The membrane is designed for compatible loose electric floor heating cables with an outside diameter between 3.8 and 5.0 mm.
Does the membrane include heating cable?
No. This product is the uncoupling membrane only unless the selected product option specifically states that heating cable or other components are included.
Can I use any electric floor heating cable?
Many loose heating cables within the specified diameter range may fit, but compatibility must also be confirmed with the cable manufacturer. Check cable diameter, minimum spacing, bend radius, watt density, voltage, and installation requirements before ordering.
Does the cable require separate clips or fasteners?
No. The raised membrane channels are designed to grip compatible heating cable and hold it in position during installation.
Can I change the heating cable spacing?
The channel layout allows flexible cable routing, but the actual spacing must remain within the limits specified by the heating cable manufacturer. Do not place cable closer together to increase heat output.
What type of thin-set mortar should be used?
Product guidance recommends modified thin-set mortar meeting ANSI A118.11 for bonding the membrane to compatible wood or concrete substrates and unmodified thin-set mortar meeting ANSI A118.1 above the membrane. Always verify compatibility with the substrate, tile, heating cable, and mortar manufacturers.
Can self-leveling compound be applied over the membrane?
It is generally not recommended. Complete necessary floor leveling before installing the membrane unless the membrane and heating system manufacturers specifically approve another installation method.
How is this different from the other MAXKOSKO membranes?
This version includes raised channels that hold loose electric floor heating cable. The other three membranes are primarily intended for tile crack protection and do not provide dedicated cable-retention channels.
Compare the basic membrane , self-adhesive membrane , and double-fleece membrane .
Questions & Answers
Have a Question?
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mortar type
When using an uncoupling membrane for floor heating cables, it's important to select an Modified Thin-Set Mortar. Follow the mortar manufacturer's instructions for mixing ratios, coverage, and thickness. Ensure that the selected mortar has good temperature resistance to accommodate the variations in temperature that may occur with the floor heating system. Uncoupling membranes are often used in tile installations to prevent cracks in the tile and grout caused by movement or expansion in the substrate.