6mm HDF Overlay Board for Routed OSB & Chipboard

Description

The Tekwarm 6mm HDF Overlay Board is a moisture resistant high-density fibreboard cover sheet for Tekwarm routed OSB and chipboard underfloor heating panels. Laid over the panels once the pipe is in place, it closes the channels, protects the pipework and gives a smooth, durable, stable surface for the final floor finish.

Each 1200 x 600 x 6mm board covers 0.72 m² and is printed with the 150mm pipe centre layout and 34 pre-marked screw points, so pipe positions are easy to see and fixings stay clear of the heating pipe. The slim 6mm profile keeps floor build-up to a minimum.

6mm

Board thickness

1200 x 600mm

Board size

0.72 m²

Coverage per board

HDF

Moisture resistant

34

Printed screw points

150mm

Printed pipe layout

Do not pierce the heating pipe

Fix the board only at the printed screw locations (34 per board), pre-drilling near the channels and positioning every screw so it cannot touch the pipe below. Always keep saw blade paths clear of the pipework when cutting.

For Tekwarm routed panels only; not a structural layer

Use over Tekwarm routed OSB and chipboard panels with the pipe already installed. It is not for solid screeds, loose-laid pipe or non-routed panels. At 6mm it is not a structural layer: the routed panel beneath carries the load, so confirm the overlay needed for your joist spacing in your design layout.

Check your floor finish

Listed for laminate, engineered wood, vinyl and carpet, following the floor covering manufacturer's guidance for use over underfloor heating. Tiling is not listed for this board, so contact us before specifying tiles.

Key features

Printed 150mm pipe layout

The 150mm pipe centre layout is printed on the board so installers can see where the pipe runs and avoid damage.

34 pre-marked screw points

Fixing locations are printed on each board, with 34 x 20mm chipboard screws recommended per board.

Moisture resistant HDF

High-density fibreboard that is moisture resistant gives a smooth, durable surface under floor finishes.

Slim 6mm profile

6mm keeps added height low, ideal for refurbishment and restricted floor levels.

12mm and 16mm systems

Suitable for 12mm and 16mm underfloor heating systems on Tekwarm routed panels.

Easy to cut and fit

Cuts with standard woodworking tools to suit room layouts and edges.

Technical specification

Product details

Brand

Tekwarm

Range

HDF Overlay Board

Manufacturer part number

PR011970

Core material

High-density fibreboard (HDF)

Moisture rating

Moisture resistant

Dimensions

Length

1200mm

Width

600mm

Thickness

6mm

Coverage per board

0.72 m²

Layout and fixings

Printed layout

150mm pipe centres

Fixings per board

34 x 20mm chipboard screws at printed locations

Fixing notes

Pre-drill near channels, ensure flatness for finish, adhesive where applicable

Compatibility and finishes

Compatible panels

Tekwarm routed OSB and routed chipboard UFH panels, standard or foiled

Pipe systems

12mm and 16mm underfloor heating

Suitable finishes

Laminate, engineered wood, vinyl and carpet

Frequently asked questions

Which panels is this overlay for?

It is designed for Tekwarm routed OSB and routed chipboard panels, standard or foiled, once the heating pipe is installed. It is not for solid screeds, loose-laid pipe or non-routed systems.

What does the overlay do?

It closes the pipe channels, protects the pipework and creates a smooth, continuous surface ready for the final floor finish.

Does it add structural strength?

No. At 6mm it is not a structural layer. The routed OSB or chipboard panels beneath provide the load-bearing support.

How is it fixed?

Use 34 chipboard screws of 20mm per board at the printed screw locations, pre-drilled near the channels and kept clear of the pipe.

What floor finishes can go on top?

It is typically used beneath laminate, engineered wood, vinyl and carpet. Follow the floor covering manufacturer's guidance for use over UFH, and contact us before using tiles.

Can I cut it on site?

Yes, with standard woodworking tools. Position fixings carefully and keep blade paths clear of the pipe below.

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

Calculate

Required Heating

0

Watts

0

BTUs