From £1,450 per window*
Based on a 1200 x 1200mm window, fitted, inc VAT, based on 4 windows fitted
uPVC Flush Casement Windows
A flat, flush sash that sits within the frame rather than on top of it. Built on our proven uPVC casement performance, with Liniar and Deceuninck Heritage systems.
Designed, supplied and fitted by our own team across Surrey, Berkshire, North Hampshire, Middlesex and West Sussex. Showroom in Guildford.
Flush casement windows sit flush within the frame rather than protruding from it, giving a smart, streamlined look that suits period and modern properties alike. Ours share the same energy rating and security options as our standard uPVC casement.
From £1,450 per window, supplied and fitted, including VAT.*
A rated
1.2 whole window U-value, same as our standard uPVC casement
Liniar and Deceuninck Heritage
Genuine flush casement profile systems
Chamfered outside, sculpted inside
The flush casement’s signature finish
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
What uPVC flush casement windows cost
From £1,450 per window, supplied and fitted, including VAT.*
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. Access, the condition of the existing frames and the fitting itself all move the final figure. Your quotation is the accurate number, and it is free.
Colours and woodgrain finishes cost more.
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.
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.
Why homeowners choose uPVC flush casement
You want a smarter, slimmer look. Clean, chamfered lines outside and sculpted curves inside, rather than a sash sitting proud of the frame.
You want the character of a period window, in a modern material. Flush casement suits historic and contemporary properties equally well.
You want genuine period hardware. Traditional peg stays and monkey-tail handles are available, in a choice of finishes.
You want proven performance underneath the style. The same energy efficiency and security options as our standard uPVC casement.
uPVC flush casement window security
A flush finish does not mean a compromise on security. Every flush casement window can be specified to PAS 24, the enhanced standard Building Regulations require on new homes, and shoot-bolt espagnolettes and anti-jemmy devices are available as an upgrade.
- Can be specified to PAS 24, the enhanced security standard used by Building Regulations
- Shoot-bolt espagnolettes available as an upgrade
- Anti-jemmy devices available as an upgrade
- Reinforced frames and internal beading
- Lockable handles
Tell your surveyor if security is a priority and we will specify accordingly.
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.
Flush casement or standard casement?
Both share the same performance. The difference is how the sash sits in the frame.
| Flush casement | Standard casement | |
|---|---|---|
| How the sash sits | Flush within the frame | Protrudes from the frame |
| Look | Streamlined, chamfered lines, period or contemporary | Traditional, defined sash lines |
| Hardware | Peg stays and monkey-tail handles available | Standard casement handles |
| Energy rating | A | A |
| Best suited to | Period properties and modern homes wanting a slimmer look | Most properties |
Not sure? Bring a photo of your elevation to the Guildford showroom.
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.
Styles and configurations
Clean, chamfered lines on the outside and a detailed finish with gently sculpted curves on the inside. Available in a variety of configurations to suit your property’s shape. Georgian bars and weather bars are available to complete the period look. Traditional peg stays and monkey-tail handles come in a range of finishes.
Colour Options
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White
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Tan
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Cream
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Brown
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Agate Grey
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Windsor
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Grey
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Slate Grey
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Slate Grey Finesse
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Buckingham Grey
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Pebble Grey
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Basalt Grey Smooth
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Anthracite Grey Smooth
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Hazy Grey Finesse
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Anthracite Grey
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Steel Blue
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Swamp Oak
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Silver D Smooth
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Sage Smooth
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Rosewood
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Pyrite
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Honey Oak Super Matt
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Irish Oak
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Flemish Gold Smooth
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Dark Red
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Dark Green
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Cream White
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Black Ulti Matt
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Black Brown
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Claystone
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Chartwell Green
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AnTEAK
uPVC flush casement specification
| Window Energy Rating | A |
|---|---|
| U-value | 1.2 W/(m²K) whole window, as standard |
| System | Liniar or Deceuninck Heritage |
| Frame depth | 70mm, six chamber |
| Maximum sash size | 800mm wide x 1500mm high |
| Security | Can be specified to PAS 24. Shoot-bolt espagnolettes and anti-jemmy devices available as an upgrade |
| 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.
uPVC flush casement windows: your questions answered
What is the difference between flush casement and standard casement?
A flush casement sash sits level within the frame when closed, rather than protruding from it, giving a smarter, more streamlined look. Both offer the same energy rating and security options.
What system are uPVC flush casement windows built on?
Liniar or Deceuninck Heritage, both genuine flush casement profile systems.
Are flush casement windows secure?
Yes. Every window can be specified to PAS 24, the enhanced security standard Building Regulations require on new homes, with shoot-bolt espagnolettes and anti-jemmy devices available as an upgrade.
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. Flush casement is often chosen precisely because it suits 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.
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.
