White UPVC Window Sill Cover – 1.75m Long, 9mm Thick (2 Pack – 100–400mm Depth Options)

Upgrade tired or damaged internal sills with our high-quality White UPVC Capping Boards, supplied in a handy 2 Pack for extended coverage or multiple windows. Each board is 1.75 metres long and made from 9mm thick rigid UPVC – built to last and easy to install.

Perfect for bathrooms, kitchens, conservatories or any indoor area, these boards are waterproof, UV-resistant and maintenance-free. Simply cut to size and fix over existing timber or MDF sills with adhesive for a clean, professional finish.

With widths available from 100mm to 400mm, you can find the right fit for both narrow and wide window boards. Ideal for DIYers and professional installers alike.

Key Features

• 2 Pack – 1.75m Boards – Suitable for larger jobs or multiple sills
• 9mm Solid Profile – Won’t bend, warp, or sag over time
• Gloss White Finish – Bright, modern, and easy to clean
• Waterproof & UV-Stable – For long-term indoor use
• Cut to Fit – Trim with a fine-tooth saw for custom fitment
• Various Depth Options – 100mm–400mm widths available
• Quick Installation – Use grab adhesive or screws
• Matching accessories – End caps and trims sold separately

Applications

• Covering damaged timber or MDF window sills
• Rental property upgrades or house staging
• Bathroom, kitchen or utility room refurbishments
• DIY improvements or trade use
• Internal capping where moisture resistance is essential

Technical Specifications

Installation Guide

1. Clean the original sill to remove dirt, grease and debris
2. Cut the board to size with a fine-tooth saw
3. Dry-fit the board to check the alignment
4. Apply strong grab adhesive (e.g., CT1, No More Nails)
5. Press the board into place and hold for 60 seconds
6. Seal edges with white silicone for a neat finish if needed

Why Buy from Windows4You?

Windows4You is a trusted UK supplier of UPVC trims, fascia boards, capping systems, and accessories. We supply trade-quality products with fast dispatch, excellent support, and competiti