25mm Square Window Sill

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

High quality square-edge window sills machined using only the finest Oak and delivered to your door directly from our UK workshop.

  • Seasoned oak timber to ensure you're buying the best
  • We can trim your sills to a more precise width/length if you need
  • We'll sand your sill after machining to ensure perfection
  • Order lengths in increments of 0.3m to save on costly wood waste
including VAT & free delivery
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Technical Specs

Read all about the specifications of our square edge window boards, including available finishes, sizes and optional extras.

Window Board

0.6-2.4 metres (2-8 feet)
200-300mm, wider on request
Solid Oak
Unfinished, sanded

Optional Extras

Cut to Size
Our oak window boards can be trimmed to your exact dimensions free of charge
Wax Finish
Choose one of our wax finishes and we'll provide your window board 'finished' to your specification

Oak Species

American White Oak (Quercus Alba)

Key Features

We pride ourselves on machining and supplying some of the best oak window sills that money can buy. Here are a few of the features that make your buying decision a whole lot easier.

Solid kiln dried oak

No veneers or MDF here! We only use high quality kiln dried solid oak for our window boards, offering a beautiful finish and durable sill.

Trim to size option

If you want to fit your oak window board as soon as it arrives, we can trim to the exact length and width that you tell us to when ordering.

All of the hard work done

In addition to optionally trimming your window boards to size, we'll machine and sand every piece to ensure an excellent overall finish.

No costly wood waste

Using our ordering options, you're able to choose a window board that most suits your size requirements, from 0.3m length and 25mm width increments.


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.

Do these sills need sanding?

We do that for you. After machining, we sand all of our window boards to ensure a perfect finish.

Would you trim the sills to size for me?

Yes. Simply select the next size option up to what you need and in the 'Trimmed to size' section of the ordering form add your dimensions.

What does delivery cost?

All of the prices you see on our website include free delivery. We like to make it easy so there aren't any unexpected costs sprung on you during checkout.

Customer Reviews

All of our reviews are by 100% verified customers.

Based on 4 reviews Write a review

Customer Reviews

Based on 15 reviews
Great service

I ordered an oak window sill, it arrived spot on time and is really good quality timber. Very impressed and will use this company again in the future.

That's great to hear Nick. Thanks for taking the time to review and I'm glad that your happy with your oak sill.
Window boards

Needed some pieces of oak cut to size for 2 cast iron radiators to sit on. Ordered these window boards as there was no additional charges for been cut to size. Very impressed with the product and service and I will definitely use again. Thanks

Thank you Richard, that's great to hear. Good to know that you're happy with our service and I hope to see you return again soon, whether it for window boards or any other oak pieces.
Oak window board

Excellent product. Bought as window board but I'll actually be cutting in half and joining lengthways to make an oak top for a unit. The quality looks great so should have no trouble making a neat join. Price was good too.

Thank you David. Great to hear and I'm pleased that the Oak is what you were hoping for. You know where we are should you ever need anything else.
Oak window board

Very good communication, quick delivery, well packaged, on time and most of all, a nice piece of wood. So many average and below average suppliers out there, definitely recommend these guys. Will order again!

Thanks for the great review Tim. Good to hear that we've ticked so many boxes. Already discussing your next order so it's great to have you return for another item :)
Fantastic service

Ordered oak window board, item was excellent quality and dispatched very fast.

Thanks Jason. So pleased that you're happy with our service and hope to see you back one day!

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