Casing Moulding Primed Finger-Jointed Fir 4.88m Window Frame Trim Damp Proof

GTR Casing Moulding is a damp proof, primed profile for trimming interior window frames. Chinese fir is chosen for its light weight and straight grain, and the finger-jointed construction keeps the long 4.88m lengths flat and true. All faces and edges are sealed at the factory, which slows moisture movement and protects the profile in rooms such as kitchens and bathrooms where humidity fluctuates. It is aimed at window installers, renovation specialists and distributors who need reliable long-length casing.

Window casing covers the joint between a window frame and the surrounding wall, giving the opening a finished, painted border. Because windows are a common source of condensation, the trim around them must be able to tolerate small changes in humidity without swelling or splitting. A sealed primed surface, combined with kiln-dried timber, gives this profile the dimensional stability to stay flat and the finish quality to accept a topcoat cleanly.

• Damp Proof Sealing: All faces and edges are sealed to slow moisture pickup in kitchens and bathrooms.
• Long 4.88m Lengths: Fewer joints around tall windows and long reveals keep the finish clean and continuous.
• Light Chinese Fir: Low density timber is easy to handle and fix overhead without additional labour.
• Finger-Jointed Core: Defects are removed, leaving a straight, stable strip free of knots and resin pockets.
• Primed White Face: Sanded primer gives a smooth base that holds both water-based and oil-based paints.
• Accurate Machining: Tight tolerance keeps mitres and butt joints close for a professional result.

The casing is used around fixed and opening windows in houses, apartments, hotels and offices, and it suits rooms with higher humidity such as kitchens, utility areas and bathrooms when the room is well ventilated. It is also appropriate for sliding door reveals and window seats, where a continuous painted border is wanted. The damp proof sealing helps the trim stay stable through seasonal changes.

Casing bundles are shrink-wrapped with a moisture barrier and corner protection, then stacked on export plywood pallets for standard containers. Packaging is designed to keep the primed surfaces clean and dry through long sea voyages. Each batch is inspected for moisture content, straightness, priming coverage and sealed edges, with inspection records held for traceability.

Widths, thicknesses and profiles can be customised to match a specific window system, and new tooling can be produced from a sample or drawing. Free samples are provided for approval. Buyers may mix casing profiles with baseboard and crown trim in a single container, and our team will confirm quantities, tooling lead time and loading plans in the order acknowledgement.