XPS400 Underfloor Heating Insulation Panels
Our XPS400 Underfloor Heating Insulation Panels provide a fast, efficient and low-profile solution for installing water underfloor heating over existing solid or timber floors. Manufactured from high-density extruded polystyrene (XPS) with a bonded aluminium heat spreader, these premium overlay boards deliver rapid heat transfer while adding just 20mm to the floor height.
Designed for both domestic and commercial projects, the boards feature pre-routed channels to accept 15mm or 16mm underfloor heating pipe at 150mm centres, making installation straightforward while ensuring even heat distribution across the floor. Whether you’re renovating a single room or fitting underfloor heating throughout an entire property, XPS400 panels offer an excellent combination of insulation, strength and speed of installation.
Why Choose XPS400 Underfloor Heating Panels?
Modern retrofit underfloor heating requires products that are quick to install without compromising performance.
Ideal for Retrofit Projects
At only 20mm thick, these boards minimise floor height build-up, making them ideal for renovation and refurbishment work.
Rapid Heat-Up
The bonded 100-micron aluminium layer spreads heat evenly across the floor surface, helping systems warm up in around 30–40 minutes under suitable conditions.
High Compressive Strength
Manufactured with 400kPa compressive strength, the boards provide a durable base suitable for everyday domestic and commercial use.
Easy to Install
The lightweight panels are simple to cut and fit, while the routed pipe channels securely hold the pipe during installation.
Suitable for Multiple Floor Finishes
Compatible with tile, laminate, engineered wood, carpet, vinyl and LVT when installed using the appropriate installation method for the chosen floor finish.
Key Features
- 1200mm x 600mm board size
- 20mm overall thickness
- Covers 0.72m² per board
- High-density XPS400 construction
- 400kPa compressive strength
- 100-micron aluminium heat spreader
- Suitable for 15mm & 16mm UFH pipe
- 150mm pipe centres
- Lightweight and easy to cut
- Suitable for domestic and commercial installations
Technical Specification
- Board Size: 1200mm x 600mm
- Coverage: 0.72m² per panel
- Thickness: 20mm
- Material: High-density XPS400
- Compressive Strength: 400kPa
- Pipe Size: 15mm or 16mm
- Pipe Centres: 150mm
- Heat Spreader: 100-micron aluminium foil
- Application: Water underfloor heating overlay system
- Installation: Existing concrete, screed or timber floors
Why Choose XPS400 Instead of Traditional Screed?
Traditional screeded systems often involve significant disruption and lengthy drying times. XPS400 overlay panels provide a much quicker alternative.
Benefits include:
- Minimal floor height increase
- No wet screed drying times
- Faster installation
- Excellent insulation properties
- Rapid heat response
- Lightweight construction
- Suitable for renovation projects
- Lower installation disruption
Ideal Applications
These XPS400 insulation panels are perfect for:
- Home renovations
- Property refurbishments
- Extensions
- Kitchens
- Bathrooms
- Conservatories
- Timber floors
- Concrete floors
- Commercial buildings
- Retrofit underfloor heating projects
Complete Your Underfloor Heating System
Build a complete system with compatible products from Kudos Trading.
16mm PE-RT Underfloor Heating Pipe
Install premium underfloor heating pipe designed for long-term performance and excellent flexibility.
Underfloor Heating Manifolds
Distribute heated water efficiently with our stainless steel and brass manifold range.
Rapid Bond Spray Adhesive
Secure the XPS panels quickly to the subfloor with our high-strength rapid bond adhesive.
Heatmiser Controls
Manage every heating zone using smart thermostats and wiring centres.
Thermal Actuators
Automate each heating circuit for maximum comfort and efficiency.
Mixing Valve Sets
Maintain the correct water temperature for your underfloor heating system.
Edge Insulation
Reduce perimeter heat loss and allow for natural floor expansion.
Pipe Cutters & Reamers
Complete every installation with professional plumbing tools.
Why Buy XPS400 Underfloor Heating Panels from Kudos Trading?
For more than 25 years, Kudos Trading has supplied premium underfloor heating systems throughout the UK.
We understand the importance of reliable products, expert advice and fast delivery. Whether you’re a professional installer or a homeowner, our experienced team is here to help you choose the right products for your project.
When you order from Kudos Trading, you’ll receive:
- Premium-quality overlay boards
- Competitive UK prices
- Fast nationwide delivery
- Expert technical support
- Extensive stock availability
- Friendly customer service
- Trusted underfloor heating specialists
Frequently Asked Questions
What are XPS400 underfloor heating panels?
XPS400 panels are insulated overlay boards designed to install water underfloor heating over existing floors with minimal increase in floor height.
How thick are the boards?
Each panel is 20mm thick.
What size pipe do they accept?
The boards are designed for 15mm and 16mm underfloor heating pipe.
How strong are the panels?
They have a 400kPa compressive strength, providing excellent durability for domestic and commercial installations.
Can they be fitted over existing floors?
Yes. They can be installed over suitable concrete, screed and timber subfloors that are clean, level and structurally sound.
Are they suitable for tiled floors?
Yes. They can be tiled over using the recommended installation method and suitable adhesives.
How quickly do they heat up?
Thanks to the aluminium heat spreader, systems typically achieve rapid heat-up, often within 30–40 minutes under suitable conditions.
What floor coverings can be used?
Depending on the installation method, the boards are suitable beneath tiles, laminate, engineered wood, carpet, vinyl and LVT.
How many square metres does each board cover?
Each board covers 0.72m².
Why buy from Kudos Trading?
We combine over 25 years of underfloor heating expertise with premium products, technical support and fast UK delivery.
Related Products
- 16mm PE-RT Underfloor Heating Pipe
- PE-RT-AL-PE-RT Pipe
- Underfloor Heating Manifolds
- Heatmiser Thermostats
- Thermal Actuators
- Rapid Bond Spray Adhesive
- Edge Insulation
- Pipe Staples
- Mixing Valve Sets
- Underfloor Heating Pumps
Next Working Day Delivery: Yes, we hold all our products in stock at our 7000 sq ft Nottingham warehouse and at our 3000 sq ft warehouse in Market Harborough and use DPD for a tracked next-day delivery.
Collection Available: You can always collect from our Norttinagham location and help yourself to a free tea and coffee.
