Water underfloor heating pipework installed across a floor system

Water underfloor heating solutions

Water Underfloor Heating Solutions by Floor Construction

Start with the way your floor is being built, then compare the systems designed for that construction.

Whether you are working with a new screed, upgrading an existing floor or heating a suspended timber construction, the right system depends on the available build-up, floor finish, heat loss and heat source.

Choose by floor construction

How Is Your Floor Being Built?

Choose the floor you are creating or retaining, then compare the suitable systems below.

New Build / In Screed

New Build / In Screed

For new slabs, extensions and major renovations where the heating pipe can be designed into the screed construction.

Compare In-Screed Systems
Overlay / Retrofit

Overlay / Retrofit

Low-profile systems fitted over a suitable existing floor where avoiding excavation and controlling build-up are important.

Compare Overlay Systems
Timber Suspended / Joisted

Timber Suspended / Joisted

Systems designed around timber joists, insulation, structural loading and the floor deck above.

Compare Timber Systems

Free water underfloor heating design

Let Us Help Plan Your System

Send us your floor plans, available floor height, intended finishes and heat source. We can help choose the system and plan the pipe circuits, manifold and controls around your project.

New build / in screed

Choose Your In-Screed System

For floors where the pipe can be installed before screeding. Choose how it is held in place: individual clips, grip rails or preformed trays.

AD-CLIP in-screed water underfloor heating kit with pipe clips

AD-CLIP

Individual clips hold the heating pipe over insulation, with flexible positioning around corners and obstacles.

Choose when
You need to follow irregular room shapes.
AD-RAIL in-screed water underfloor heating kit with grip rail

AD-RAIL

Grip rails hold repeated rows of heating pipe over insulation before screeding.

Choose when
You are setting out regular pipe runs in open rooms.
AD-TRAY in-screed water underfloor heating kit with preformed pipe tray

AD-TRAY

Preformed trays hold the heating pipe in place and guide its spacing before screeding.

Choose when
You want a tray-guided pipe layout.
Compare the fixing methods and screed build-up. Read the Full Comparison

Overlay / retrofit

Low-Profile Systems for Existing Floors

Add heating above a suitable existing structural floor. Compare the board and levelling options below, allowing for preparation layers and your chosen floor finish as well as the heating panel itself.

AD-CXPS cement-coated overlay water underfloor heating kit

AD-CXPS

Cement-coated, grooved XPS boards create a durable heating layer above an existing structural floor.

Choose when
You want a robust board for a retrofit project.
AD-EPS400 foil-faced EPS overlay water underfloor heating kit

AD-EPS400

Lightweight, foil-faced EPS400 panels hold the heating pipe and include an insulating layer.

Choose when
Keeping the weight of the overlay low is a priority.
AD-SLIM high-density gypsum overlay water underfloor heating kit

AD-SLIM

Grooved, high-density gypsum boards form a compact dry overlay layer for the heating pipe.

Choose when
You want a dense board system without a full screed.
AD-SLIM Max reinforced low-profile water underfloor heating floor build-up

AD-SLIM Max

A low-profile panel holds the pipe within a specified reinforced levelling compound.

Choose when
Your refurbishment allows for a levelling layer over a sound base.
Compare board construction, finished height and floor coverings. Read the Full Comparison

Timber suspended / joisted

Systems Planned Around the Timber Floor

Timber-floor systems must be selected alongside the joist layout, insulation, structural deck and floor finish. Choose a lightweight spreader-plate route, a designed dry-screed build-up or a grooved chipboard deck.

AD-PLATE floor build-up showing aluminium spreader plates and heating pipe above insulated timber joists

AD-PLATE

Aluminium spreader plates hold the heating pipe beneath a separate timber floor deck.

Choose when
You want a lightweight system without screed.
AD-DRY floor build-up showing heating pipe in dry-mix screed between insulated timber joists beneath a floor deck

AD-DRY

Heating pipe sits within supported dry-mix screed between the timber joists.

Choose when
The floor is designed to support the added screed load.
AD-CHIPBOARD floor build-up over insulated timber joists

AD-CHIPBOARD

Foil-faced, grooved chipboard panels hold the heating pipe and form the floor deck.

Choose when
You are fitting or replacing a joisted floor deck.
Compare how each system fits into the timber floor. Read the Full Comparison

Water underfloor heating advice

Frequently Asked Questions

Common questions about choosing water underfloor heating for your floor construction.

Which water underfloor heating system is best for a new build?

An in-screed system is often the natural starting point when the floor construction is still being designed. AD-CLIP, AD-RAIL and AD-TRAY offer different pipe-fixing approaches; the project design should confirm the final route, pipe spacing, screed and circuit layout.

Which system is best for a renovation or existing floor?

A low-profile overlay system may avoid excavating the existing structural floor. The best option depends on the condition of the base, available finished height, heat loss and floor covering—not simply the panel thickness.

Can different systems be used in the same property?

Yes. A project may combine in-screed, overlay and timber-floor systems across different areas. The heating design should coordinate the circuit outputs, water temperatures, manifolds, controls and floor-finish limits.

Will these systems work with a heat pump?

Water underfloor heating can work very effectively with a correctly designed heat-pump system. The room heat loss, flow temperature, pipe layout, floor finish and controls must be assessed together to confirm the required output.

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Does the thinnest panel always give the lowest finished floor height?

No. Panel thickness is only one layer. Primers, adhesives, underlay, overboarding, levelling compounds and the final floor covering all contribute to the finished build-up.

What information is needed for a system design?

Provide dimensioned plans, room uses, floor constructions, insulation, available build-up, proposed coverings, heat source and manifold location. A heat-loss assessment can then be used to confirm the suitable system and circuit design.