Wet Underfloor Heating Kits

Our range of water underfloor heating kits provides contractors and DIYers with an all-in-one, pre-engineered hardware package to streamline hydronic system installation. Each complete set is designed to offer an efficient heating solution, ensuring you get an ideal match for your specific layout and allowing you to enjoy consistent thermal comfort across any room.

What Are Water Underfloor Heating Systems & How Do They Work?

Hydronic or water underfloor heating systems utilise a network of underfloor heating pipes to circulate warm water beneath your flooring, creating a balanced heat distribution that eliminates cold spots and outperforms traditional convective radiators.

A wet UFH system operates on the radiant principle, warming objects and occupants directly from the floor up. Circulating warm water through durable pipework embedded under your flooring turns the entire surface into a large, low-temperature emitter that maintains consistent room warmth.

Why Choose an Underfloor Heating Kit?

Sourcing individual components for a hydronic UFH system can be time-consuming and risks parts being incompatible. Buying a complete UFH package offers several distinct advantages:

• Guaranteed Compatibility: Every manifold, pump, and pipe is specifically matched to work perfectly together.
• Cost-Effective: It’s generally more affordable than buying each component separately.
• Time-Saving: With everything shipped in one package, you can start your installation the moment your delivery arrives.
• Convenient Sizes: Our kits are available in a wide range of pre-packaged size variants (ranging from small 15m² single-room kits up to extensive 120m² multi-room setups).

Types of Wet UFH Kits We Offer

We stock a wide variety of kits tailored to different subfloors, heat requirements, and project types:

• High Output: Featuring premium PERT-AL-PERT or EVOH 16mm pipes, these kits are designed for rooms with higher heat loss (like conservatories) or spaces where you want faster warm-up times.
• Low Profile: Ideal for retrofitting existing homes. These kits use a thinner 12mm pipe and take up minimal floor height, ensuring you won’t need to drastically adjust your doors or skirting boards.
• EPS Overlay: Perfect for simple, screed-free installations. These feature pre-routed EPS insulation panels that the pipework easily slots into, creating a highly efficient thermal barrier that pushes warmth straight up into your room.
• Aluminium Spreader Plate: The go-to solution for suspended timber or joisted floors. The aluminium plates securely hold the loops and evenly distribute the warmth across your floorboards.

What Is Included in Our Water UFH Kits?

While the exact contents vary based on the specific package and coverage area you select, a standard package from The Underfloor Heating Expert typically includes:

• High-Quality Pipes: WRAS-approved PERT-AL-PERT or EVOH pipe (available in 12mm or 16mm).
• Premium Brass Manifold: Complete with flow meters, fill/drain valves, air vents, and a Grundfos A-rated pump.
• Fixing Methods: Depending on your chosen installation type, these include pipe staples/clips, EPS overlay boards, or aluminium spreader plates.
• Essential Accessories: Edge insulation, pipe cutters and connectors. (Note: Thermostats are often sold separately, so you can choose a wired, wireless, or smart/WiFi setup that suits your home.)

How to Choose the Right UFH Kit

Choosing the right underfloor heating kit depends on the layout of your property and structural floor limits. Assess your floor to determine whether you need an in-screed or overlay system, calculate the total floor area, and define your UFH zones. Each pack is designed to provide the essential baseline components required to ensure easy installation and premium long-term performance.

Which Water UFH Kits Are the Best Choice for Retrofits?

For retrofits, we recommend low-profile overlay UFH systems because they sit directly over existing subfloors without requiring an additional layer of screed. These systems use thin pipework embedded in pre-grooved insulation panels, keeping floor buildup to an absolute minimum. This eliminates major structural disruptions like trimming doors or raising skirting boards, making it the cleanest, fastest option for renovations.

What Is the Best UFH Kit for New Builds and Extensions?

Traditional in-screed or clip-track UFH kits are ideal for new builds and new extensions. This installation method secures heavy-duty pipework directly to floor insulation before pouring liquid or sand-and-cement screed over it. Encasing the loops creates a highly efficient thermal mass that retains and evenly distributes heat for maximum long-term energy efficiency.

What Is the Right UFH Kit for Multi-Zone Applications?

In heating terms, a “zone” isn’t always a single room; it is any area controlled by one thermostat, which could be a large open-plan kitchen or a collection of smaller spaces (like a hallway or utility room) heated together. Our standard water UFH packs are designed for single-zone installations, but can be easily adapted to multi-zone systems by adding a wiring centre and extra thermostats.

FAQ

Can an underfloor heating system fully replace traditional radiators?

Yes, a properly sized and configured wet UFH system can completely replace traditional radiators. It distributes heat evenly across the entire floor surface, eliminating cold spots and freeing up valuable wall space. Hydronic UFH operates efficiently at lower water temperatures while still maintaining excellent thermal performance.

Which flooring materials are compatible with water underfloor heating?

Almost any standard flooring material can be used to cover underfloor heating loops, provided it meets the system’s thermal guidelines. Tile and stone are the most effective due to their high thermal conductivity, but engineered wood, luxury vinyl tiles (LVT), laminates, and UFH-compatible carpets are also widely used. Always check the flooring manufacturer’s maximum temperature limit (typically 27°C) before installation.

Is professional installation required for your wet UFH kits?

No, professional installation is not strictly mandatory, but a qualified professional must complete the final system connections. While any competent DIYer can lay the insulation panels, clip down the pipework, and mount the manifold, a qualified installer or plumber must connect the system to your boiler or heat pump. Gas Safe registration is required for installations that involve gas boilers.

Can a wet underfloor heating system be installed over existing timber floor joists?

Yes, wet UFH can be installed over timber floor joists using aluminium spreader plates or specialised overlay boards. Spreader plates sit directly between or over the joists to hold the loops and distribute heat evenly across the floorboards. Alternatively, lightweight low-profile overlay panels can be laid directly on top of an existing timber deck, preventing structural overloading.

Is water underfloor heating more expensive than electric underfloor heating?

Yes and no; while the upfront installation cost for hydronic systems is higher, the running cost is significantly lower. Water UFH utilises highly efficient heat sources, such as gas boilers or heat pumps. Electric systems, while cheaper to install, rely on mains electricity, which is substantially more expensive per kilowatt-hour. This means that while electric UFH is a popular choice for small areas like single bathrooms due to its simpler installation, water systems are vastly superior if you want to keep your long-term energy bills low.