25 x 244mm Moisture Resistant MDF Windowboard N&T Primed 3.66m

The 25 × 244 mm Moisture Resistant MDF Windowboard N&T Primed – 3.6 m is a high-quality internal MDF windowboard designed for extra-deep window reveals and wide internal window sills. Manufactured from moisture resistant (MR) MDF, it offers improved dimensional stability and durability in environments exposed to intermittent humidity, making it suitable for kitchens, bathrooms and utility rooms.

With its 244 mm depth, this primed MDF windowboard is ideal for deep cavity wall construction, thick masonry and wide reveals, ensuring full coverage over plasterwork and window linings. The Nose & Tongue (N&T) profile enables accurate jointing between boards, delivering a clean, consistent finish across longer window runs.

Supplied factory primed, the board significantly reduces on-site preparation and provides an excellent base for a smooth, high-quality painted finish. It is a reliable and cost-effective solution for both new-build and refurbishment interior joinery projects.

Key Features

• Moisture Resistant MR MDF windowboard for internal applications

• 244 mm depth – ideal for extra-deep window reveals and wide sills

• Nose & Tongue (N&T) profile for neat, secure jointing

• 25 mm thickness for strength and rigidity

• 3.6 m length to minimise joints and speed up installation

• Factory primed for quick painting

• Smooth, consistent surface for professional finishes

Typical Applications

• Internal MDF window sills

• Extra-deep window reveals and wide openings

• Kitchens, bathrooms and utility rooms

• Residential and commercial interior fit-outs

• New-build and refurbishment projects

Performance & Workability

• Enhanced resistance to moisture compared to standard MDF

• Easy to cut, machine, joint and fix using standard woodworking tools

• Requires only light sanding before final paint application

• Intended for internal use only

Technical Specification

• Product Type: MDF Windowboard

• Material: Moisture Resistant MDF

• Profile: Nose & Tongue (N&T)

• Thickness: 25 mm

• Depth: 244 mm

• Length: 3.6 m

• Finish: Primed

• Use Class: Internal

Why Choose a 244 mm MR MDF Windowboard?

The 25 × 244 mm MR MDF Windowboard N&T Primed – 3.6 m is ideal where maximum coverage is required for deep reveals or wide internal window sills. Offering moisture resistance, clean jointing and a smooth painted finish, it provides a dependable and cost-effective alternative to solid timber for modern interior joinery and fit-out work.