20mm Bullnose Window Sill

Availability: In stock

Your Bullnose 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.

Expertly machined and hand finished 20mm bullnose window boards, made from high quality solid oak. Unbeatable quality, price and service on all oak window boards, with custom options too.

  • All oak window boards arrive sanded, ready to finish
  • Order lengths in 300mm increments to save on costly waste
  • Available to be trimmed to length and width needed
  • High quality solid kiln dried oak
including VAT & free delivery
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Technical Specs

Our bullnose window boards are ever-popular among our customers, and for good reason. 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 machine the same profile to the left and/or right hand edges
Wax Finish
Choose one of our exceptional wax finishes and we'll deliver your window board 'finished' to your spec

Oak Species

American White Oak (Quercus Alba)

Key Features

Our bullnose window sills are machined with great attention to detail, and finished to an excellent standard. Here are just a few of the features that we offer.

All of the hard work done

All of our oak window boards arrive ready to install. Machined and sanded, and optionally waxed finished.

High quality solid oak

100% solid oak, no veneers! Hand picked American White Oak with natural beauty and durability.

Cut to size available

At no extra cost to you, we can trim your oak sill to size, so it arrives ready to fit and perfectly finished.

Reduce costly waste

To help save on costly oak waste, you can order your solid oak window board in increments of 0.3m (300mm).


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.

Can you trim my sills to the size I need?

Yes, that's not a problem. Simply choose the next size up in our options and enter the dimensions you'd like your bullnose window board to finish in the 'Trimmed to size' box.

How much will delivery be?

All of our oak window boards include free delivery. The prices you see displayed on the product page are what you'll pay including VAT. No hidden costs during checkout.

Do I need to sand the window boards?

Every window board that we send out is machined and sanded, ready to fit when it arrives. We can even wax finish your oak sill for you too.

Customer Reviews

All of our reviews are by 100% verified customers.

Based on 8 reviews Write a review

Customer Reviews

Based on 47 reviews
Custom Order Window Sill

Exceptional quality and expert craftsmanship - couldn’t recommend enough. I requested a specific width and and finish and these were both absolutely perfect.

Glad to hear it Christopher! I’m pleased that you received the exact window sill you were after and happy with the finish. Thanks for leaving us a review, it’s much appreciated.

Great service

Great service, quality product.

Thank you, that’s great to know :)

Bull nose window sill

Excellent response to my initial request even though it was a little out of the ordinary. Perfect fit and delivered on time. Great work.

Looks great in situ Roger. Satisfying to know that we were able to do this in one piece for you rather than joined, as the Oak always looks more impressive in single piece boards. Let me know should you ever need anything else.

Ballnose window sill

Excellent service and very please with the product will definitely use them again

Looks really nice, thanks for sharing the photo Lee!

Amazing Quality

Really great product. I asked for a custom size and it was done no problem. Would order again in a heart beat.

Thanks for the great review Kirsten. Good to know that you’re pleased with the custom cutting service and our window boards lived up to expectations :)

20mm bull nose sills

Well packaged and the product was cut to fit which is great, minor crack appeared in one sill after sealing but was able to use other side.

Good to know that you’re happy with the cutting to size Robert. Sorry to hear a slight split appeared, I can only imagine this wasn’t noticeable before sending as we never intentionally send anything out that we’re not happy with. If it’s ever a problem let me know and I’ll be certain to sort this out for you.

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