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.

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
Shopify secure badge

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

All of our reviews are by 100% verified customers.

No reviews yet Write a review

Customer Reviews

Based on 9 reviews

Ordered several oak cills from Essential. Arrived ahead of schedule and the unblemished product was packaged in a manner to avoid damage. Great product great service. Will certainly use again.

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

Very competitive excellent product. Will use again.

Looking forward to seeing you again hopefully soon Peter :)
20mm Chamfer Window Sil

Nice item was well packaged, arrived quickly and fitted perfectly - would recommend

Excellent! That's great to hear and thanks for taking the time to provide a review of your window board.
Window sill

Excellent product and service

Thanks for the review Ian :)
Good Customer Experience

As a first time customer impressed with the end to end service provided by Essential Woodwork. Ordering process was straight forward with an easy to navigate web site. The wood I ordered arrived as scheduled it was well packaged and protected. When I require quality wood for my next project will be returning to Essential Woodwork.

That's great John, thanks for the review. I'm pleased that you're happy with your window board! You know where we are whenever you need anything else.

You Might Also Like