Timber Casement Windows

Timeless design, modern performance. Bespoke timber casement windows, built to the character of your home rather than the other way round..

Designed, supplied and fitted by our own team across Surrey, Berkshire, North Hampshire, Middlesex and West Sussex. Showroom in Guildford.

Timber suits the properties uPVC and aluminium do not: period homes, conservation areas, and anywhere the character of the original window matters. Every frame is built to your opening, in a choice of styles and finishes.

From £2,499 per window, supplied and fitted, including VAT.*

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flush casement timber windows

From £2,800 per window*

Based on a 1200 x 1200mm window, fitted, inc VAT, based on 4 windows fitted

A rated

U-values typically around 1.2 W/m²K, varying with size, glazing and configuration.

PAS 24 available

Enhanced security, specified on any window

Quote in 4 working days

Home visit in 2, written quote 2 after that

8 to 10 weeks

Order to installation, then 1 to 2 days on site

10 year guarantee

Insurance backed as standard, plus your FENSA certificate

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What timber windows cost

From £2,800 per window, supplied and fitted, including VAT.* Four windows on that basis are £11,200.

Most window companies will not put a number on a page. We will, because you need one before you invite anyone into your house.

Prices are indicative. Every opening is different, and a bespoke timber frame is measured and built to fit yours. Your quotation is the accurate number, and it is free.

Spread the cost

Your payment can be spread monthly over a term of up to 10 years.** Finance is provided by Dopple and you apply through our finance portal. A small deposit is due on order, the balance on completion.

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timber look windows

How long it takes

Stage How long
Enquiry to home visit As little as 2 working days
Home visit to quotation 2 working days, up to 5 for specialist items
Order to technical survey Up to 10 working days
Order to installation Generally 8 to 10 weeks
Time on site Typically 1 to 2 days for a full house
Do you need to move out? No. You stay in the house throughout

Why quotes are valid for 14 days

Glass manufacturing is heavily energy dependent, so our costs move with energy prices. Rather than pad every quotation against a rise that may not happen, we quote the real number on the day. If it lapses, come back whenever you are ready and we will requote free of charge.

stormproof timber windows

Why homeowners choose timber

You want a period or heritage look done properly. Timber suits conservation areas and listed buildings in a way uPVC and aluminium cannot match.

You want it built to your opening, not chosen from a size chart. Every frame is measured and made for your window, in a style and finish to match your home.

You want warmth without losing character. Timber has always been a strong natural insulator, and a well built frame keeps that performance for decades.

You want security that does not look like security. Reinforced frames, internal beading and multipoint locking systems sit behind a traditional appearance.

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Timber window security

Every timber window can be specified to PAS 24, the enhanced security standard that Building Regulations require on new homes. It means the window has been physically attacked under test conditions and held. Tell your surveyor if security is a priority for you and we will specify accordingly.

  • Can be specified to PAS 24, the enhanced security standard used by Building Regulations
  • Reinforced frames as standard
  • Internal beading, so the glazing cannot be accessed from outside
  • Multipoint locking systems
  • Lockable handles
Bespoke Timber French Doors In Woking

Expertise You Can Trust

Proudly serving Surrey since 1972, we’re a family-run glazing company offering quality windows, doors, conservatories, and bespoke glass solutions. Whether you’re upgrading your home’s look with double glazing, choosing a new front door, or planning a unique orangery, our team is here to bring your vision to life.

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Casement or flush casement?

Timber Casement and Timber Flush Casement windows share the same materials and performance, and differ only in how the sash sits in the frame.

Timber Casement Timber Flush Casement
How it opens Outward, on hinges at either side Outward, on hinges at either side
Sash position Protrudes from the frame Sits flush within the frame when closed
Look Traditional, defined sash lines Streamlined, flat appearance
Best suited to Most period and traditional properties Properties aiming for a neater, more contemporary heritage look

Not sure which suits your house? Bring a photo of your elevation to the Guildford showroom and we will talk you through it.

Planning your next project? Check if we cover your area.

Sheerwater Glass proudly provides window and door installations, repairs, and glazing services throughout Surrey and the surrounding areas from our showrooms in Guildford and Woking.

To find out whether we cover your area, simply click the button below and check your postcode.

Check your postcode

Styles and configurations

Side hung, top hung and fixed lights in any combination. Bay and bow windows. Arched and shaped heads. Georgian and leaded designs. A cat flap fitted into the glass. Trickle vents where Building Regulations require them.

Slimline is not available as a flush casement. If you want a sash that sits flush within the frame, our flush casement range does that in uPVC, timber and aluminium.

Farrow & Ball

Farrow & Ball Colour Chart

Timber specification

Window Energy Rating A
U-value U-values typically around 1.2 W/m²K, varying with size, glazing and configuration.
Species and construction To be confirmed
Finish To be confirmed
Frame depth To be confirmed
Sightline To be confirmed
Maximum sash size Side hung 800mm x 1500mm, top hung 1200mm x 1200mm (w x h).
Opening angle 1200 x 1200mm
Opening angle To be confirmed
Security Can be specified to PAS 24. Reinforced frames, internal beading, multipoint locking, lockable handles
Colours and finishes 34, including 8 woodgrains
Guarantee 10 years on frames, glass units and workmanship. 5 years on moving parts and hardware

Hear from our customers

“Nick from Sheerwater Glass just finished fitting my windows – Great service, quick, efficient and very friendly. Definitely recommend.”

Deborah Proudfoot
Sheerwater Glass Customer

Your Glass Options

Option What it does Standard or upgrade
Argon fill Better insulation than air Standard
Low emissivity coating Reflects heat back into the room Standard
Warm edge spacer bar Cuts heat loss and condensation at the edge of the glass Standard
Toughened safety glass Required by Building Regulations in some positions. We will tell you where Where required
Acoustic glass Worth it on a main road, but only ever as good as the fabric of the building around it. Ask your adviser Upgrade
Laminated security glass Holds together if broken Upgrade
Obscure and patterned Bathrooms and overlooked windows Upgrade
Leaded and Georgian bar Period elevations and conservation areas Upgrade
Upgraded thermal unit Improves the U-value of the whole window Upgrade
Triple glazing Best performance, heaviest units. Available on selected frames Upgrade

Your guarantee

Frames, glass units and workmanship 10 years
Moving parts and hardware 5 years
Insurance backed guarantee QANW, as standard
FENSA certificate Issued automatically on qualifying installations

The insurance backed part matters: your cover survives even if we are not here to honour it, and we provide it even on installations that do not qualify for FENSA. Most local companies do not.

Questions we get asked

How much do timber windows cost?

From £2,800 per window, supplied and fitted, including VAT, on the basis set out above. Four windows on that basis are £11,200. Prices are indicative and your quotation is the accurate figure.

What is the difference between casement and flush casement?

Casement windows have a sash that protrudes from the frame when closed, giving a traditional look. Flush casement windows sit level with the frame for a more streamlined appearance. Both share the same materials and performance.

Are timber windows secure?

Yes. Every timber window can be specified to PAS 24, the enhanced security standard Building Regulations require on new homes, and includes reinforced frames, internal beading and multipoint locking as standard.

Do I need planning permission?

Usually not, but you might if your house is listed or sits in a conservation area, and there are around 200 of those in Surrey. Timber is often the material of choice in these areas. We will flag it at survey if we think you are affected.

Will I get a FENSA certificate?

Yes, automatically, on every installation that qualifies. You will need it when you sell the house.

Can I buy the windows without installation?

Yes. We supply only if you are arranging your own fitting.

Ready to get a quote?

You’ll speak to a real person, not a call centre. We’ll talk you through options, no pressure.

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Pricing, finance and page notes

* Prices are indicative starting prices, reviewed regularly. They are based on a 1200 x 1200mm window in white with one side hung opener, a fanlight and a fixed pane below, supplied and fitted including VAT, and an order of four windows to the same property. Colours and woodgrain finishes cost more.

** Finance is provided by Dopple, not by Sheerwater Glass. Sheerwater Glass Ltd is an Introducer Appointed Representative of Social Money Ltd, trading as Dopple, which is authorised and regulated by the Financial Conduct Authority, firm reference number 675283. We introduce you to Dopple and we do not lend or give credit advice. Applications are made through our finance portal and all lending is subject to status and affordability. Dopple provides the rate, the term options and a representative example before you apply.

Specifications vary by window style, so a figure given here for a Slimline casement may not apply to another style, size or material. What governs your installation is the specification in your written quotation and signed contract. If a particular figure matters to your decision, ask your surveyor and we will put it in writing.