Window Sills – Internal & External UPVC Boards, Capping & Covers

Upgrade your home with our full range of window sills, designed to offer a sleek, durable, and low-maintenance finish for any interior or exterior space. Whether you’re replacing old timber boards or finishing off new windows, we provide everything you need — all in one place.

🏠 Internal Window Sills

Our internal window sills are made from high-quality UPVC and available in a variety of styles and sizes. Perfect for living rooms, kitchens, bathrooms, or office spaces. Easy to cut and install, with a clean, professional look.

🌧 External Window Sills

Built to withstand the elements, our external window sills are waterproof, UV-resistant, and designed for long-term performance. Ideal for protecting the base of your windows while enhancing curb appeal.

🔧 Capping Boards

Need a quick refresh? Use our window capping boards to cover up existing sills without the need for full removal. A smart and cost-effective solution for renovations.

🧩 Sill Cover Boards

Slim, lightweight, and durable — sill cover boards are perfect for DIY upgrades or large-scale trade projects. Available in a variety of widths, colours, and finishes.

🧱 End Caps & Sill Accessories

Complete your installation with our range of end caps and accessories. These finishing touches ensure your window sills look neat, secure, and fully sealed.

✔ Why Choose Our Window Sills?

• Maintenance-free UPVC – no painting or sealing required

• Range of lengths and depths available (100mm to 400mm)

• Available in white, anthracite grey, black ash, and more

• Easy to install – suitable for glue, screws, or silicone

• Perfect for home improvements, new builds, and commercial use

Browse our collection today and find the right solution for every window project — from internal sills to external covers, we’ve got you covered.