20mm Round Window Sill

Availability: In stock

Your Round Window Sills will be dispatched between and (+1 day if choosing our waxed finish option) with free next day delivery.

*NEW* 'Priority' option now available during checkout for faster dispatch.

Perfectly machined and hand finished 20mm round edge window boards. Available in a range of lengths and widths, with end profiling and optional wax finishes. The very best single piece solid kiln dried oak.

  • All oak window boards arrive sanded and optionally wax finished
  • Save on costly waste by ordering in 0.3m increments
  • We'll optionally trim your window board to the exact size you need
  • Only the highest quality solid kiln dried oak used
including VAT & free delivery
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Technical Specs

Our oak window board range is among the best that money can buy. Unrivalled in quality, value for money and optional extras.

Window Board

0.6-2.4 metres (2-8 feet)
200-300mm, custom orders welcome
Solid Oak
Unfinished, sanded

Optional Extras

Trimmed to Size
Provide us with your exact window board measurements and we'll machine and sand your sill to your exact size
Profile Returns
Choose the 'Profile returns' option and we'll match the same profile to the right and/or left hand edges
Wax Finish
Choose one of our fantastic wax finishes and we'll deliver your window board 'finished' to your chosen colour

Oak Species

American White Oak (Quercus Alba)

Key Features

All of our window boards are expertly machined and hand finished, with great optional extras. Here are just a few of the features that we offer.

We do all of the hard work

Not only are your window boards machined and sanded, but can also be profiled on the ends and wax finished.

High quality solid oak

No veneers here! Carefully selected American White Oak is chosen with natural beauty and durability.

Cut to size available

We can trim your window boards to your required size, free of charge. Ready to fit as soon as it arrives.

Save on costly waste

You don't want to be paying for excessive Oak waste, which is why we offer a wide variety of lengths and widths.


We understand you might have a few questions you'd like answering before ordering. Here we list a few of the most common one's, though you're welcome to contact us should you have something else to ask.

Are you able to trim my window boards to my exact dimensions?

Yes of course. Simply choose the next size up to the size you want your window board trimmed to, then enter the dimensions in the 'Trimmed to size' box.

Is delivery additional?

The price you see is the price you pay. Every window board price displayed is including VAT and delivery. No hidden costs. It's fast delivery too!

Do the window boards arrive ready to fit?

We not only machine, but also sand your window board so that it's ready to treat and fit. We also offer several options to wax finish before sending.

Customer Reviews

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Customer Reviews

Based on 9 reviews
Oak window sill
Thank you Julie, that’s great to hear. Great to know that your pleased with your wooden window sills.
Great oak cills
That's great to hear. I'm glad that you're happy with the sills.
American Oak Window Sill / Board.
Thanks Mark. I'm glad that you're happy with the sill!
Window board
Thank you Jason, that's great to hear and I'm pleased that you're happy with your oak window board. I look forward to seeing you return hopefully soon!
You'll be glad you ordered this.
Fantastic, that's great to hear Robert. Always great to hear from someone who's happy with their purchase, and I'm glad that the oak window sill has lived up to expectations :)
Window board review
Great to hear Philip! Glad that you're happy with the oak sill :)

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