Anthracite Grey UPVC Capping Board – 1.25m Long, 1 Pack (150mm to 300mm Depth Options)

Modernise your window sills with our stylish Anthracite Grey UPVC Capping Board, designed for fast, effective upgrades without costly replacements. These 1.25-metre long, 9mm thick boards are ideal for covering tired timber or MDF window boards with a sleek and contemporary grey finish.

The Anthracite Grey smooth surface offers a refined, low-maintenance aesthetic that suits both traditional and modern interiors. Manufactured from durable, weather-resistant UPVC, this board provides a long-lasting solution that is resistant to moisture, UV exposure, warping, and discolouration.

With depth options from 150mm to 300mm, our grey window sill cover is suitable for a wide range of window types and room applications – from kitchens and bathrooms to conservatories and utility rooms.

Product Features

• 1.25m Length – ideal for shorter sills or precise cutting with minimal waste
• 9mm Thick Solid UPVC – offers strength and durability over time
• Smooth Anthracite Grey Finish – elegant modern appearance
• Water & UV Resistant – suitable for humid and sunlit environments
• Simple Installation – trim to size and secure with grab adhesive
• Low Maintenance – no sanding, painting or sealing required
• Available Depths: 150mm, 175mm, 200mm, 225mm, 250mm, 300mm
• Optional Accessories – matching end caps and adhesives available

Best For

• Renovating old wooden or MDF window sills
• Quick updates in modern grey-themed interiors
• Property improvements before sale or letting
• Bathroom, kitchen, utility, or conservatory upgrades

Technical Specifications

Installation Steps

1. Ensure existing sill is clean and free from debris or grease
2. Measure and cut the board to size using a fine-tooth saw
3. Dry-fit the board to check alignment
4. Apply a strong grab adhesive (e.g. CT1, No More Nails)
5. Press into place and hold for 60 seconds
6. Seal edges with silicone for a neat, water-resistant finish

Note: Use a butt joint or trim connector if installing multiple boards for wider coverage.

Why Buy from Windows4You?

As a UK-based supplier, Windows4You offers premium-quality UPVC building products with rapid delivery and reliable support. We stock a wide range of capping boards, trims, and accessories in modern and classic finishes – perfect for DIY or trade customers across the UK.