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
Shopify secure badge

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

All of our reviews are by 100% verified customers.

No reviews yet Write a review

Customer Reviews

Based on 16 reviews
Shirin Childs (Crouch)
Beautiful oak

Excellent quality oak window sills delivered on time and securely wrapped

That's great to hear, and thanks for the review Shirin. Always good to see photos of the finished work :)

Paul Hodges (Kidderminster)
Excellent service

Board arrived well wrapped and in perfect condition highly recommended would use again

That's great to hear, thanks Paul :)

Chris (Harpenden)
Superb Quality Oak Window Sill

Ordered a 2400mm x 225mm x 20mm round oak window sill to self cut into 3 different pieces to use as part of our DIY downstairs toilet refurbishment.

We couldn't be happier with the quality of the oak we received. It was well packaged for transit, perfectly flat and the quality and character of the oak really shines through when enhanced/protected with a few coats of polyx oil raw.

We used in 3 places and it's been perfect for all 3
1) Small window sill
2) Concealed toilet cistern boxing cover
3) Pipe boxing cover

We won't hesitate to buy again for any of our future DIY refurbishment projects

Thank you for the review Chris. It's great to hear from happy customers! I really appreciate you taking the time to provide a photo of the finished product also - it all looks superb now fitted :)

Stephen Case (Barking)
20mm round window sill

Went for the waxed option, great colour nice grain in the wood, cut to size a perfect fit. Really impressed with quality and service

Great to hear that your pleased with your oak window board Stephen. Let me know should you ever need anything else.

Graham Beasley (City of Westminster)
Oak window board

Quality piece of timber. Beautifully finished.

Thank you Graham, looks great! Thanks for taking the time to upload a photo of the oak board for us.

Mikr Smith (Saffron Walden)
Strongly recommended!

These guys do a great job. Excellent quality product and it arrives exactly when they say it will. And they are very friendly!

Thank you Mike, we do try and be as friendly and helpful as possible! Great to know that you’re happy with your order, thanks for the feedback.

You Might Also Like