20mm Chamfer Window Sill

Availability: In stock

Your Chamfer 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.

Stylish chamfer edge oak window boards, machined and sanded to a 20mm thickness. Available with optional profiled ends (returns) and wax finished in your choice of colour, or provided unfinished.

  • Arrive sanded and ready to finish, or optionally wax finished
  • Save on costly waste by ordering in 300mm increments
  • We'll optionally trim to the length and width you need, free of charge
  • Highest quality solid kiln dried oak used with every window board
including VAT & free delivery
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Technical Specs

Our chamfer window sills are a stylish and popular option among our range. 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 sill dimensions and we'll machine and sand your board 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 sides of the sill
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 chamfer window boards are second to none, with great attention to the finished quality of every oak sill. Here are just a few of the features that we offer.

The complete window board

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

High quality solid oak

We only use 100% solid kiln dried oak that is going to offer durability and longevity. Each individually hand chosen.

Trimmed to size available

As part of our unbeatable service we'll trim your window board to the exact length and width that you provide, free of charge.

Save on costly waste

All of our oak window boards are available in a number of length and width combinations, saving on unnecessary waste.


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 cut these to size for me?

Yes, of course. We have a 'Trimmed to size' option available for this purpose. Simply order the next size up to what you need and enter the dimensions you'd like it trimmed to in the box provided.

How much does delivery cost?

Every oak window board includes free delivery. The price you see displayed on this page is the price you'll pay including VAT and delivery. No hidden costs during checkout.

Can you sand my window board for me?

Already done! Every window board that we machine is sanded as standard. We can even wax finish your window board too if you choose from among our range of colours.

Customer Reviews

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Customer Reviews

Based on 12 reviews
I’m so glad we could help and that you’re pleased with the oak sill. It’s always great to hear when we’ve been able to supply exactly what our customers are after and really appreciate you taking the time to call. Let me know should you ever need anything else.
Window board
Thanks Martin. Great to know that you're happy with the oak window board, especially since you worked in the trade yourself. Thanks for taking the time to review us.
Thanks for your order Mary. I'm glad you like the window board :)
That's perfect, thanks Gareth. Always satisfying to know when customers are pleased with their purchase. Hopefully see you return again sometime.
Oak cill boards
Looking forward to seeing you again hopefully soon Peter :)
20mm Chamfer Window Sil
Excellent! That's great to hear and thanks for taking the time to provide a review of your window board.

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