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MDF Window Boards

Constructed from the highest density, moisture-resistant MDF available on the market, perfect for high condensation windows. Create your custom window sill with depths from 150mm - 400mm, thicknesses from 18mm - 25mm, and lengths from 600mm - 4200mm, covering all interior window applications for British properties.

Made From High-Density MDF

Our window boards are made from moisture resistant HDF, a high-density composite constructed from softwood fibres and resin, compacted at extremely high pressures and heat. This creates an impeccably smooth surface and dense core, that can resist moisture and humidity, making them ideal for all interior projects. The manufacturing process also makes our MDF window sills highly machinable, easy to cut and mitre to your desired sizes. Many of our customers choose to DIY their window sills for this reason.

Also choose from factory finishes of primed, unprimed, undercoated and matt grey. Every window board is made to order in our Birmingham factory, with free delivery nationwide on all orders over £30. Bespoke and bulk window board orders welcome, contact our sales & in-house design specialists at info@skirtingworld.co.uk.

For More Than Just Window Sills

MDF (High-Density Fibreboard) and HDF (High-Density Fibreboard) are versatile materials that can be used for more than just window sills. You can also create a cosy window seat with our window boards, perfect for enjoying a scenic view of your garden or reading a book. Whether you want to add some charm to your home or improve its value with a renovation, our window sills are the best option.

Some customers also choose our deeper window sills to create window sill extensions, creating more valuable real estate on their windows for plants and decorations.

Bespoke Window Sills

If you need a custom size for your window board, we can help. We offer a bespoke service that can cut the window board to your desired length and width. Just send us an email with your specifications and we'll get back to you as soon as possible. We are based in the UK and we deliver nationwide with Free Standard Delivery on all orders over £30, so you can get your window boards in no time.

Free Lifetime Guarantee On All Window Boards

We're confident in our MDF and you should be too, rest assured in your order with a free 25 year guarantee on all of our MDF products, including MDF window sills.

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Skirting World

Bullnose MDF Window Board

Bullnose Window Board (also called a Bullnose Window Sill) – A simple and effective way to add a little style to your space. Complete the look by pairing with our Bullnose MDF Skirting Board, the Bullnose Window Board is a perfect, no-frills...

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£3.84 (Ex. VAT)

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Skirting World

Square MDF Window Board

Our Square MDF Window Board is moisture resistant as standard You are looking at our Square Window Board (also known as square window cills) - used by both professionals in the trade and the general public. Whether you use the 18mm thick or the 25mm...

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£3.84 (Ex. VAT)

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Skirting World

Double Bullnose MDF Window Board

Our Double Bullnose MDF Window Board is moisture resistant as standard You are looking at our Double Bullnose Window Board (also known as double bullnose window cills) - used by both professionals in the trade and the general public. Whether...

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£3.84 (Ex. VAT)

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Skirting World

Double Edge 2 MDF Window Board

Our Double Edge 2 MDF Window Board is moisture resistant as standard You are looking at our Double Edge 2 Window Board (also known as double edge 2 window cills) - used by both professionals in the trade and the general public. Whether you use the...

£4.61 (Inc. VAT)

£3.84 (Ex. VAT)

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