uPVC Window Cill Capping Board Cover 1m / 1.5m White

The uPVC Window Cill Capping Board is the perfect solution for refreshing tired, worn-out window sills without the hassle and expense of a full replacement. Designed to fit directly over your existing internal sills, these boards provide a crisp, modern, and professional finish that is both highly durable and completely maintenance-free.

What is a Window Cill Capping Board Used For?

Capping boards are specifically engineered to permanently cover damaged, stained, or dated timber window sills. They provide a moisture-resistant and wipe-clean surface, making them ideal for high-humidity areas like kitchens and bathrooms, as well as high-traffic living spaces. They are also commonly utilized as decorative fascia boards in various trim and finishing applications around the home.

Key Features & Benefits

• Maintenance Free: Completely eliminates the need for painting, sanding, or glossing—simply wipe clean with a damp cloth to maintain its pristine look.
• Durable uPVC: Fully resistant to deep moisture penetration, surface scratches, and UV yellowing for long-lasting performance.
• Easy to Cut: Can be effortlessly trimmed and shaped to your exact size using a standard fine-toothed hand saw or jigsaw.
• Clean, Versatile Finish: Available in a wide range of convenient widths to suit almost any interior window reveal depth.
• Cost-Effective Upgrade: A quick, mess-free, and affordable way to instantly modernize the look of your interior windows.

Product Specifications

Typical Applications

• Refurbishing weathered or discoloured internal window sills in domestic properties.
• Covering old, splintered timber sills in rental properties, buy-to-lets, or quick renovations.
• Acting as protective decorative fascia or robust shelving in damp-prone utility areas.
• Finishing off structural window reveals cleanly inside new build conservatories and home extensions.

Step-by-Step Installation Instructions

1. Measure: Carefully measure the total width and the exact depth of your existing internal window sill before cutting.
2. Cut: Trim the uPVC capping board cleanly to the required length and depth dimensions using a fine-toothed saw.
3. Apply Adhesive: Apply a generous, even amount of high-quality gap-filling adhesive or trade silicone directly onto the underside of the board.
4. Position: Firmly press the capping board down onto the old sill base, verifying it sits completely flat and level against the masonry structure.
5. Finish: Install matching end caps (sold separately) and run a neat bead of matching white silicone along the joint edges for a truly professional, watertight seal.