Chipboard

Chipboard is commonly used for flooring, shelving, furniture, kitchen units, wardrobes, worktops, packaging and general interior building work. It is a practical choice where a stable and affordable board is needed, especially when the surface will be covered, laminated or hidden. Flooring-grade chipboard is often used over joists to create a strong base for carpets, laminate or other floor finishes.

Chipboard flooring is a structural board designed to be laid over floor joists. It usually has tongue and groove edges, which help the boards lock together and reduce movement between joints. P5 moisture resistant chipboard flooring is commonly used in housebuilding and renovation because it provides a solid floor deck and can cope better with normal site humidity during installation.

P5 chipboard is a moisture resistant structural grade used for flooring and load-bearing applications in humid conditions. It is stronger and more suitable for floors than standard non-structural chipboard. However, P5 does not mean waterproof. The boards should still be protected from heavy rain, standing water and long-term damp, and any cut edges should be sealed where required.

Egger and Caber chipboard flooring boards should not be assumed to fit together, even if they are the same thickness and both are P5 tongue-and-groove boards. The tongue-and-groove profile can vary by manufacturer. For the best fit, use the same brand throughout the floor area, or test the joint before installation. If just replacing a few boards, you can cut off the tongue of the new boards and drop them into place.   

Chipboard is made from larger wood particles, while MDF is made from finer wood fibres. MDF is smoother and better for painting, routing and decorative joinery. Chipboard is usually more affordable and often used for flooring, furniture frames, cabinets and shelving, especially when faced with melamine or covered with another finish. For painted furniture, MDF is usually the better option.

Yes, chipboard can be painted, but it normally needs more preparation than MDF or plywood. The surface should be clean, dry and lightly sanded, and raw edges may need filling or sealing because they absorb paint heavily. Use a suitable primer before applying a top coat. If you want a very smooth decorative finish, MDF or hardwood plywood may be a better choice.

The right thickness depends on the use. Thinner chipboard can be used for lightweight backing, packaging or temporary work. Medium thicknesses are suitable for shelving, cabinets and general interior projects. For floors, use flooring-grade tongue and groove chipboard in the thickness specified for the joist spacing and load requirements. For structural work, always follow the project specification or installer’s guidance.

No, chipboard is generally not suitable for outdoor use. Even moisture resistant P5 chipboard is designed for internal humid conditions, not permanent exposure to weather. If it gets soaked or remains damp for long periods, it can swell and lose strength. For external projects, use a board designed for outdoor conditions, such as suitable plywood, OSB3 with protection, or treated timber.