Name: ThermRite 18mm Floating Floor UFH Panel – Foil-Faced EPS, 150mm Pipe Centres, 12mm Pipe, Wood or Laminate Floor
Brand: AIZO Quality Heating
SKU: thermrite-18mm-floating-floor-ufh-panel-foil-faced-eps-150mm-pipe-centres-12mm-pipe-wood-or-laminate-floor
Availability: InStock

✨ New Arrivals Just Dropped!Explore

Home Store

ThermRite 18mm Floating Floor UFH Panel – Foil-Faced EPS, 150mm Pipe Centres, 12mm Pipe, Wood or Laminate Floor

18mm Total DepthEPS Foil-Faced150mm Pipe Centres12mm PipeFloating InstallationWood / Laminate Floor0.72 m² Per Panel50-Year Guarantee

The ThermRite 18mm Floating Floor UFH Panel is a foil-faced EPS insulation board designed for the installation of water underfloor heating under floating interlocking wood, laminate and engineered timber floors. Pre-routed for 12mm UFH pipe at 150mm centres, the panel is simply laid onto an existing screed or floor deck without fixing — the floating floor is then laid directly over the top. The metallised foil surface improves heat distribution and reduces warm-up time, while the EPS core provides thermal insulation beneath the pipes. At 18mm total depth, it keeps floor height increase to a minimum for retrofit and renovation projects.

18 mm

Total Depth

150 mm

Pipe Centres

12 mm

Pipe Size

0.72 m²

Per Panel

50 yr

Guarantee

ℹ System Note: This panel is designed for use with 12mm pipe in a floating installation — it is not intended for bonded tile or vinyl finishes. For bonded finishes requiring 16mm pipe, see the ThermRite PRO 16mm or 20mm panels. For tile-direct applications with 12mm pipe, see the ThermRite 18mm Solid Floor Panel.

ThermRite Overlay Panel Range — at a Glance

Panel	Core	Pipe	Centres	Surface	Floor Finishes	Method
16mm PRO	EPS 400 kPa	12mm	150mm	Foil 200µm	Tile / Wood / Vinyl / Carpet	Bonded or Floating
18mm Floating ✓	EPS	12mm	150mm	Foil	Wood / Laminate (floating)	Float
20mm PRO	EPS 400 kPa	16mm	150mm	Foil 200µm	Tile / Wood / Vinyl / Carpet	Bonded or Floating
25mm Floating	EPS 0.036 W/mK	16mm	150mm	Unfoiled	Wood / Laminate (floating)	Float

This listing covers the highlighted row. All panels are 1200 × 600mm (0.72 m²).

Key Features & Benefits

Floating Installation — No Adhesive or Fixing Required

The panel is laid directly onto an existing screed or timber floor deck without any adhesive or mechanical fixing. A polythene vapour barrier should be laid beneath the panels on concrete slabs. The interlocking wood or laminate floor is then laid over the panels, holding everything in place. No specialist tools, no curing time, no drying time.

12mm Pipe at 150mm Centres — Compact Pipe System

Pre-routed for 12mm multilayer pipe (PEX-Al-PEX / PERT-Al-PERT) at 150mm centres. The 12mm pipe system offers a smaller bend radius than 16mm pipe, making it well-suited to smaller rooms and complex layouts. The grooves securely retain the pipe without additional clips.

Foil-Faced Surface — Improved Heat Transfer

A metallised aluminium foil bonded to the top surface and into the pipe grooves acts as a radiant heat spreader, distributing warmth evenly across the panel surface and reducing the warm-up time before the floor feels warm underfoot.

EPS Core — Thermal Insulation

The EPS foam core provides thermal resistance beneath the pipes, reducing downward heat loss to the subfloor. For ground-floor installations over concrete slabs, additional ThermRite XPS insulation boards can be laid beneath the panels for further efficiency improvement.

4 Grooves at 150mm — Efficient Room Coverage

Each 1200 × 600mm panel contains 4 pipe grooves at 150mm centres, plus bulb-end returns and 3 straight runs at the panel top for flow and return connections. This layout minimises the number of joins needed across a room and makes pipe routing intuitive.

Suitable for Domestic and Commercial Applications

The floating floor system is appropriate for both residential and light commercial installations — offices, showrooms and commercial spaces where a timber or laminate floor finish is preferred over tiles.

50-Year Guarantee

ThermRite backs its floating floor insulation panels with a 50-year guarantee on the thermal and structural performance of the EPS core.

Technical Specifications

Panel Dimensions & Coverage
Panel Size	1200 × 600mm
Thickness	18mm
Panel Area	0.72 m²
Coverage	14 panels ≈ 10 m²
Construction
Core Material	EPS (expanded polystyrene)
Surface	Metallised aluminium foil — bonded to top surface and into grooves
Performance
Pipe Spacing	150mm centres
Compatible Pipe Diameter	12mm multilayer (PEX-Al-PEX / PERT-Al-PERT)
Groove Design	4 grooves @ 150mm centres + bulb returns + 3 straight runs (flow & return)
Floor Finishes	Floating interlocking wood, laminate, engineered timber
Installation
Method	Floating — no adhesive or fixing required
Subfloor	Solid concrete screed or timber floor deck
Vapour Barrier	Polythene barrier recommended on concrete slabs
Floor Finish Direction	Lay interlocking floor at 90° to pipe direction
Guarantee
Guarantee	50 years

Installation Overview

Floating Floor Installation

Lay a polythene vapour barrier over the concrete slab or timber deck (recommended on concrete).
Plan the panel layout to minimise cuts and ensure pipe grooves align across panel joins.
Lay panels without adhesive — butt joints tight, no gaps.
Press 12mm pipe into the pre-routed grooves, starting from the manifold.
Lay the interlocking T&G chipboard, plywood or click-lock flooring at 90° to the pipe direction.
Leave a 10–15mm expansion gap around the perimeter of the room before laying skirting.

ℹ Note: This panel is designed for floating installation only — do not bond to subfloor. The floor finish must be interlocking (click-lock or T&G) to avoid panels shifting. Minimum subfloor flatness SR2 (+/−5mm over 2m).

Frequently Asked Questions

What floor finishes can go over the 18mm floating panel?

This panel is designed for floating interlocking wood, laminate and engineered timber floors — click-lock LVT/SPC, T&G chipboard, and similar. The interlocking floor is laid directly over the panels at 90° to the pipe direction. For tile, vinyl or bonded finishes, use the ThermRite PRO 16mm or 20mm bonded panels instead.

Does the 18mm floating panel need to be glued down?

No — the panel is designed to be laid loose on the subfloor without any adhesive or mechanical fixing. The weight of the floating floor deck and furniture hold it in place. A polythene vapour barrier is recommended under the panels on concrete slabs.

Why does this panel use 12mm pipe rather than 16mm?

The 18mm floating panel is grooved for 12mm pipe, which has a tighter minimum bend radius than 16mm pipe — making it easier to route through smaller rooms and tight corners without exceeding the pipe's minimum bend radius. For 16mm pipe in a floating installation, use the ThermRite PRO 20mm or 25mm panels instead.

Do I need additional insulation under the floating panels?

For ground-floor concrete slab installations, additional sub-insulation is strongly recommended to reduce downward heat loss. ThermRite XPS insulation boards (3–25mm) can be laid beneath the floating panels. For upper floors over heated spaces, the EPS core of the floating panel may be sufficient on its own.

What is the difference between this and the 25mm floating panel?

Both are EPS foil-faced floating panels, but the 18mm panel uses 12mm pipe while the 25mm panel uses 16mm pipe. The 25mm panel also provides more insulation depth. Choose 18mm when height is the primary constraint and 12mm pipe suits the system design; choose 25mm when greater insulation depth is needed or 16mm pipe is already specified.

More Images