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ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor
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ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor

ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor

25mm Total DepthEPS 0.036 W/mK150mm Pipe Centres16mm PipeFloating InstallationWood / Laminate Floor0.72 m² Per Panel50-Year Guarantee

The ThermRite 25mm Floating Floor Panel is a grooved EPS insulation board designed for water underfloor heating installations under floating wood, laminate and engineered timber floors. Pre-routed for 16mm UFH pipe at 150mm centres, the panel provides greater insulation depth than the 18mm floating alternative — thermal conductivity of 0.036 W/mK — making it the preferred choice for ground-floor installations, poorly insulated subfloors or rooms with higher heat loss. Panels are simply laid and the floating floor fitted over the top, with no adhesive or mechanical fixing required.

25 mm
Total Depth
0.036 W/mK
Thermal Cond.
150 mm
Pipe Centres
0.72 m²
Per Panel
50 yr
Guarantee
ℹ Best for Ground-Floor Timber Flooring: The 25mm depth and higher insulation value make this panel ideal for ground-floor slabs or poorly insulated subfloors. For upper-floor installations where insulation depth matters less, the 18mm floating panel offers a lower build-up with 12mm pipe.
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
Greater Insulation Depth — 0.036 W/mK EPS
25mm of EPS insulation (thermal conductivity 0.036 W/mK) provides meaningfully more downward heat loss resistance than 18mm alternatives — important for ground-floor concrete slabs, suspended timber floors without underfloor insulation, and older buildings where subfloor insulation is minimal or absent.
Floating Installation — Simple and Fast
The panel is laid directly onto an existing screed or floor deck without any adhesive or mechanical fixing. A polythene vapour barrier is recommended on concrete slabs. The floating wood or laminate floor is then laid over the panels at 90° to the pipe direction, holding everything in position.
16mm Pipe at 150mm Centres — High Output
Pre-routed for 16mm multilayer pipe (PEX-Al-PEX / PERT-Al-PERT) at 150mm centres. Grooves include radius returns and 3 straight runs at the panel top for flow and return routing. Pipe is retained securely without supplementary clips.
Radiused Grooves with Foil — Improved Heat Transfer
The aluminium foil bonded to the upper surface and into the grooves distributes heat from the pipe across the full panel area, reducing warm-up time and evening out temperature distribution beneath the floor finish.
Suitable for Domestic and Commercial Applications
The 25mm floating panel is appropriate for both residential and light commercial installations where a floating timber or laminate finish is preferred and insulation performance is a design priority.
50-Year Guarantee
ThermRite backs its floating floor 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 25mm
Panel Area 0.72 m²
Coverage 14 panels ≈ 10 m²
Construction
Core Material EPS (expanded polystyrene)
Thermal Conductivity 0.036 W/mK
Surface Metallised aluminium foil — bonded to top and into grooves
Groove Design 4 grooves @ 150mm centres + radius returns + 3 straight runs (flow & return)
Performance
Pipe Spacing 150mm centres
Compatible Pipe Diameter 16mm multilayer (PEX-Al-PEX / PERT-Al-PERT)
Floor Finishes Floating interlocking wood, laminate, T&G chipboard/plywood
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
Minimum Floor Deck (over panels) 18mm T&G chipboard / 25mm commercial
Guarantee
Guarantee 50 years
Installation Overview
Floating Floor Installation
  1. Lay a polythene vapour barrier over the concrete slab or timber deck (recommended on concrete).
  2. Plan panel layout to ensure pipe grooves align across panel joins.
  3. Lay panels without adhesive — butt joints tight, no gaps.
  4. Press 16mm pipe into the pre-routed grooves from the manifold connection point.
  5. Lay T&G chipboard (18mm min domestic / 25mm commercial), click-lock plywood or wood strip flooring at 90° to the pipe direction.
  6. Leave a 10–15mm expansion gap around the perimeter before fitting skirting boards.
  7. In areas of heavy traffic or furniture, timber supports can be placed under floor board joints.
ℹ Note: This panel is designed for floating floor installation only — panels are not bonded. Minimum floor finish thickness: 18mm T&G chipboard or wood strip for domestic applications, 25mm for commercial.
Frequently Asked Questions
What floor finishes are suitable over the 25mm floating panel?
The 25mm panel is designed for floating interlocking floor finishes — T&G chipboard, click-lock plywood decks, engineered wood strip flooring and floating laminate. Minimum thickness: 18mm for domestic applications, 25mm for commercial. For tile or vinyl finishes, use the ThermRite PRO 20mm bonded panel instead.
What is the difference between the 18mm and 25mm floating panels?
The primary difference is insulation depth and pipe size. The 18mm panel uses 12mm pipe and provides less insulation; the 25mm panel uses 16mm pipe and provides more insulation (0.036 W/mK EPS). Choose 25mm for ground-floor slabs or poorly insulated subfloors where thermal resistance is important; choose 18mm when height is the critical constraint and 12mm pipe suits the system.
Does the panel need to be glued to the subfloor?
No — the 25mm floating panel is designed to lie loose without any adhesive or fixing. The overlying floor deck holds the panels in place. A polythene vapour barrier is recommended under the panels on concrete slabs to prevent moisture migration.
Is additional sub-insulation needed under this panel?
For ground-floor concrete slabs, adding ThermRite XPS insulation boards beneath the floating panels is strongly recommended to prevent downward heat loss into the slab. The 25mm EPS provides better insulation than the 18mm panel but is still best complemented by a full ground-floor insulation layer for maximum system efficiency — especially with heat pumps.
Can this panel be used in commercial applications?
Yes. The EPS core provides adequate compressive strength for light commercial use with a 25mm floor deck over the panels. For areas of very heavy point loads (industrial racking, heavy machinery), consult ThermRite for appropriate panel selection.
Related Products
ThermRite PRO 20mm
Dual-purpose bonded panel — tile or wood, 16mm pipe
ThermRite 18mm Floating
Lower profile option — 12mm pipe, less insulation
16mm Multilayer UFH Pipe
WRAS-approved pipe compatible with 25mm floating panel
$22.94
ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor—
$22.94

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ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor - Image 2
ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor - Image 3

ThermRite 25mm Floating Floor UFH Panel – EPS Insulation Board, 150mm Pipe Centres, 16mm Pipe, Wood or Laminate Floor

25mm Total DepthEPS 0.036 W/mK150mm Pipe Centres16mm PipeFloating InstallationWood / Laminate Floor0.72 m² Per Panel50-Year Guarantee

The ThermRite 25mm Floating Floor Panel is a grooved EPS insulation board designed for water underfloor heating installations under floating wood, laminate and engineered timber floors. Pre-routed for 16mm UFH pipe at 150mm centres, the panel provides greater insulation depth than the 18mm floating alternative — thermal conductivity of 0.036 W/mK — making it the preferred choice for ground-floor installations, poorly insulated subfloors or rooms with higher heat loss. Panels are simply laid and the floating floor fitted over the top, with no adhesive or mechanical fixing required.

25 mm
Total Depth
0.036 W/mK
Thermal Cond.
150 mm
Pipe Centres
0.72 m²
Per Panel
50 yr
Guarantee
ℹ Best for Ground-Floor Timber Flooring: The 25mm depth and higher insulation value make this panel ideal for ground-floor slabs or poorly insulated subfloors. For upper-floor installations where insulation depth matters less, the 18mm floating panel offers a lower build-up with 12mm pipe.
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
Greater Insulation Depth — 0.036 W/mK EPS
25mm of EPS insulation (thermal conductivity 0.036 W/mK) provides meaningfully more downward heat loss resistance than 18mm alternatives — important for ground-floor concrete slabs, suspended timber floors without underfloor insulation, and older buildings where subfloor insulation is minimal or absent.
Floating Installation — Simple and Fast
The panel is laid directly onto an existing screed or floor deck without any adhesive or mechanical fixing. A polythene vapour barrier is recommended on concrete slabs. The floating wood or laminate floor is then laid over the panels at 90° to the pipe direction, holding everything in position.
16mm Pipe at 150mm Centres — High Output
Pre-routed for 16mm multilayer pipe (PEX-Al-PEX / PERT-Al-PERT) at 150mm centres. Grooves include radius returns and 3 straight runs at the panel top for flow and return routing. Pipe is retained securely without supplementary clips.
Radiused Grooves with Foil — Improved Heat Transfer
The aluminium foil bonded to the upper surface and into the grooves distributes heat from the pipe across the full panel area, reducing warm-up time and evening out temperature distribution beneath the floor finish.
Suitable for Domestic and Commercial Applications
The 25mm floating panel is appropriate for both residential and light commercial installations where a floating timber or laminate finish is preferred and insulation performance is a design priority.
50-Year Guarantee
ThermRite backs its floating floor 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 25mm
Panel Area 0.72 m²
Coverage 14 panels ≈ 10 m²
Construction
Core Material EPS (expanded polystyrene)
Thermal Conductivity 0.036 W/mK
Surface Metallised aluminium foil — bonded to top and into grooves
Groove Design 4 grooves @ 150mm centres + radius returns + 3 straight runs (flow & return)
Performance
Pipe Spacing 150mm centres
Compatible Pipe Diameter 16mm multilayer (PEX-Al-PEX / PERT-Al-PERT)
Floor Finishes Floating interlocking wood, laminate, T&G chipboard/plywood
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
Minimum Floor Deck (over panels) 18mm T&G chipboard / 25mm commercial
Guarantee
Guarantee 50 years
Installation Overview
Floating Floor Installation
  1. Lay a polythene vapour barrier over the concrete slab or timber deck (recommended on concrete).
  2. Plan panel layout to ensure pipe grooves align across panel joins.
  3. Lay panels without adhesive — butt joints tight, no gaps.
  4. Press 16mm pipe into the pre-routed grooves from the manifold connection point.
  5. Lay T&G chipboard (18mm min domestic / 25mm commercial), click-lock plywood or wood strip flooring at 90° to the pipe direction.
  6. Leave a 10–15mm expansion gap around the perimeter before fitting skirting boards.
  7. In areas of heavy traffic or furniture, timber supports can be placed under floor board joints.
ℹ Note: This panel is designed for floating floor installation only — panels are not bonded. Minimum floor finish thickness: 18mm T&G chipboard or wood strip for domestic applications, 25mm for commercial.
Frequently Asked Questions
What floor finishes are suitable over the 25mm floating panel?
The 25mm panel is designed for floating interlocking floor finishes — T&G chipboard, click-lock plywood decks, engineered wood strip flooring and floating laminate. Minimum thickness: 18mm for domestic applications, 25mm for commercial. For tile or vinyl finishes, use the ThermRite PRO 20mm bonded panel instead.
What is the difference between the 18mm and 25mm floating panels?
The primary difference is insulation depth and pipe size. The 18mm panel uses 12mm pipe and provides less insulation; the 25mm panel uses 16mm pipe and provides more insulation (0.036 W/mK EPS). Choose 25mm for ground-floor slabs or poorly insulated subfloors where thermal resistance is important; choose 18mm when height is the critical constraint and 12mm pipe suits the system.
Does the panel need to be glued to the subfloor?
No — the 25mm floating panel is designed to lie loose without any adhesive or fixing. The overlying floor deck holds the panels in place. A polythene vapour barrier is recommended under the panels on concrete slabs to prevent moisture migration.
Is additional sub-insulation needed under this panel?
For ground-floor concrete slabs, adding ThermRite XPS insulation boards beneath the floating panels is strongly recommended to prevent downward heat loss into the slab. The 25mm EPS provides better insulation than the 18mm panel but is still best complemented by a full ground-floor insulation layer for maximum system efficiency — especially with heat pumps.
Can this panel be used in commercial applications?
Yes. The EPS core provides adequate compressive strength for light commercial use with a 25mm floor deck over the panels. For areas of very heavy point loads (industrial racking, heavy machinery), consult ThermRite for appropriate panel selection.
Related Products
ThermRite PRO 20mm
Dual-purpose bonded panel — tile or wood, 16mm pipe
ThermRite 18mm Floating
Lower profile option — 12mm pipe, less insulation
16mm Multilayer UFH Pipe
WRAS-approved pipe compatible with 25mm floating panel

Product Information

Shipping & Returns

Description

25mm Total DepthEPS 0.036 W/mK150mm Pipe Centres16mm PipeFloating InstallationWood / Laminate Floor0.72 m² Per Panel50-Year Guarantee

The ThermRite 25mm Floating Floor Panel is a grooved EPS insulation board designed for water underfloor heating installations under floating wood, laminate and engineered timber floors. Pre-routed for 16mm UFH pipe at 150mm centres, the panel provides greater insulation depth than the 18mm floating alternative — thermal conductivity of 0.036 W/mK — making it the preferred choice for ground-floor installations, poorly insulated subfloors or rooms with higher heat loss. Panels are simply laid and the floating floor fitted over the top, with no adhesive or mechanical fixing required.

25 mm
Total Depth
0.036 W/mK
Thermal Cond.
150 mm
Pipe Centres
0.72 m²
Per Panel
50 yr
Guarantee
ℹ Best for Ground-Floor Timber Flooring: The 25mm depth and higher insulation value make this panel ideal for ground-floor slabs or poorly insulated subfloors. For upper-floor installations where insulation depth matters less, the 18mm floating panel offers a lower build-up with 12mm pipe.
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
Greater Insulation Depth — 0.036 W/mK EPS
25mm of EPS insulation (thermal conductivity 0.036 W/mK) provides meaningfully more downward heat loss resistance than 18mm alternatives — important for ground-floor concrete slabs, suspended timber floors without underfloor insulation, and older buildings where subfloor insulation is minimal or absent.
Floating Installation — Simple and Fast
The panel is laid directly onto an existing screed or floor deck without any adhesive or mechanical fixing. A polythene vapour barrier is recommended on concrete slabs. The floating wood or laminate floor is then laid over the panels at 90° to the pipe direction, holding everything in position.
16mm Pipe at 150mm Centres — High Output
Pre-routed for 16mm multilayer pipe (PEX-Al-PEX / PERT-Al-PERT) at 150mm centres. Grooves include radius returns and 3 straight runs at the panel top for flow and return routing. Pipe is retained securely without supplementary clips.
Radiused Grooves with Foil — Improved Heat Transfer
The aluminium foil bonded to the upper surface and into the grooves distributes heat from the pipe across the full panel area, reducing warm-up time and evening out temperature distribution beneath the floor finish.
Suitable for Domestic and Commercial Applications
The 25mm floating panel is appropriate for both residential and light commercial installations where a floating timber or laminate finish is preferred and insulation performance is a design priority.
50-Year Guarantee
ThermRite backs its floating floor 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 25mm
Panel Area 0.72 m²
Coverage 14 panels ≈ 10 m²
Construction
Core Material EPS (expanded polystyrene)
Thermal Conductivity 0.036 W/mK
Surface Metallised aluminium foil — bonded to top and into grooves
Groove Design 4 grooves @ 150mm centres + radius returns + 3 straight runs (flow & return)
Performance
Pipe Spacing 150mm centres
Compatible Pipe Diameter 16mm multilayer (PEX-Al-PEX / PERT-Al-PERT)
Floor Finishes Floating interlocking wood, laminate, T&G chipboard/plywood
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
Minimum Floor Deck (over panels) 18mm T&G chipboard / 25mm commercial
Guarantee
Guarantee 50 years
Installation Overview
Floating Floor Installation
  1. Lay a polythene vapour barrier over the concrete slab or timber deck (recommended on concrete).
  2. Plan panel layout to ensure pipe grooves align across panel joins.
  3. Lay panels without adhesive — butt joints tight, no gaps.
  4. Press 16mm pipe into the pre-routed grooves from the manifold connection point.
  5. Lay T&G chipboard (18mm min domestic / 25mm commercial), click-lock plywood or wood strip flooring at 90° to the pipe direction.
  6. Leave a 10–15mm expansion gap around the perimeter before fitting skirting boards.
  7. In areas of heavy traffic or furniture, timber supports can be placed under floor board joints.
ℹ Note: This panel is designed for floating floor installation only — panels are not bonded. Minimum floor finish thickness: 18mm T&G chipboard or wood strip for domestic applications, 25mm for commercial.
Frequently Asked Questions
What floor finishes are suitable over the 25mm floating panel?
The 25mm panel is designed for floating interlocking floor finishes — T&G chipboard, click-lock plywood decks, engineered wood strip flooring and floating laminate. Minimum thickness: 18mm for domestic applications, 25mm for commercial. For tile or vinyl finishes, use the ThermRite PRO 20mm bonded panel instead.
What is the difference between the 18mm and 25mm floating panels?
The primary difference is insulation depth and pipe size. The 18mm panel uses 12mm pipe and provides less insulation; the 25mm panel uses 16mm pipe and provides more insulation (0.036 W/mK EPS). Choose 25mm for ground-floor slabs or poorly insulated subfloors where thermal resistance is important; choose 18mm when height is the critical constraint and 12mm pipe suits the system.
Does the panel need to be glued to the subfloor?
No — the 25mm floating panel is designed to lie loose without any adhesive or fixing. The overlying floor deck holds the panels in place. A polythene vapour barrier is recommended under the panels on concrete slabs to prevent moisture migration.
Is additional sub-insulation needed under this panel?
For ground-floor concrete slabs, adding ThermRite XPS insulation boards beneath the floating panels is strongly recommended to prevent downward heat loss into the slab. The 25mm EPS provides better insulation than the 18mm panel but is still best complemented by a full ground-floor insulation layer for maximum system efficiency — especially with heat pumps.
Can this panel be used in commercial applications?
Yes. The EPS core provides adequate compressive strength for light commercial use with a 25mm floor deck over the panels. For areas of very heavy point loads (industrial racking, heavy machinery), consult ThermRite for appropriate panel selection.
Related Products
ThermRite PRO 20mm
Dual-purpose bonded panel — tile or wood, 16mm pipe
ThermRite 18mm Floating
Lower profile option — 12mm pipe, less insulation
16mm Multilayer UFH Pipe
WRAS-approved pipe compatible with 25mm floating panel