uPVC sliding sash windows
The character of the originalLet the light in.
- A+ ratedWindow energy rating
- PAS 24: 2022Security upgrade
- Made to measureBuilt to your opening
- Any colourRAL or Farrow & Ball
- 10 year warrantyFENSA registered
Window styles
Four looks. Pick the one that matches your house.
Every window is made to your opening, so the choice here is about how it looks, not what will fit.
Georgian bars
Panes divided into a grid, like the originals. Usually what a conservation officer wants to see.
Plain glass
Nothing dividing the panes. The most daylight and the clearest view, the way many Victorian houses started out.
Any colour
Sprayed to any classic RAL shade or matched to a Farrow & Ball colour. Inside and out need not match.
Bay & shaped
Splay and box bays, plus shaped and arched frames for the openings a standard window will not fit.
The details
The choices that make it yours.
Every window is made to your order, down to the colour it is sprayed, the glass inside it and the hardware you open it with.
Hardware
Fasteners, sash lifts and inset finger pulls in eight finishes, from chrome and satin to antique gold. The detail you touch every day.
Tilts inward
Both sashes tilt in, so upstairs windows are cleaned from inside the room and never need a ladder.
The glass
Toughened as standard, with acoustic, solar control and obscure patterns for bathrooms and street-facing rooms.
Energy & security
Warm, quiet, and hard to get into.
The two things that actually decide a sash replacement: what it costs to heat the room, and whether the window opens for anyone but you.
Energy
A+ Window Energy Rating. Warmer rooms, lower bills, and no draught coming through where the two sashes meet.
- Weather bar joined into the bottom sash, pushing rain off the sill instead of into the frame
- Made to measure and colour matched, so there are no packers and no gaps to draught through
- Wind resistance tested to Class C4 at 1600 Pa under BS EN 12211
- Tilts inward for cleaning, so upstairs windows never need a ladder
Security
Also available as a Secured by Design window, the police-backed standard. Required if the property was built to Document Q.
- A steel bar built into the sash so it cannot be forced open with a crowbar
- High-security cam locks holding both sashes, top and bottom
- Jam blocks fitted to the top of the sash, plus travel restrictors as standard
- Toughened glass on accessible openings
Two ways to buy
We fit them, or we deliver them to you.
Fitted by us
West London & the Home Counties
- We survey before anything is ordered, so the sizes are ours to get right
- Fitted by our own teams, never subcontracted out
- FENSA certificate and an insurance-backed guarantee on completion
- Old windows taken away and the plaster made good
Popular areas: Uxbridge, West London, Beaconsfield, and every area we cover.
Supply only
Delivered anywhere in Britain
- Made to your sizes, from your schedule or your survey
- Full control of colour, glass, hardware and bar layout
- Lead times confirmed in writing before you order
- Kerbside delivery nationwide
Who we work with
Tell us which you are and we will send the right thing.
Homeowners
You want to know what it will look like, what it will cost, and how long you will be without a window. Send a photo and we will price it.
WhatsApp →Architects & specifiers
Sections, U-values, PAS 24 scope and Document Q compliance, plus RAL and Farrow & Ball matching for your finishes schedule.
Request the spec pack →Developers
Whole-plot pricing, phased delivery to site, and one schedule covering every elevation. Supply only or supplied and fitted.
Price a development →Builders
Trade terms, firm lead times and kerbside delivery to your site anywhere in Britain. Made to the sizes you give us.
Open a trade account →Our work
Real installations, photographed as they were left.
Advice
The questions people ask before they order.
Straight answers on warmth, noise, condensation and what the rules require, written from test data rather than rules of thumb.
Are uPVC sash windows warm?
The A+ rating, U-values and glazing that decide how much heat a sash keeps in.
Stopping condensation on sash windows
Why it forms on the glass, and what actually clears it on a sliding sash.
Acoustic glass for quieter rooms
How the right glass cuts traffic and flight path noise through a sash window.
Planning permission and the rules
When permission or building regs apply to replacing sash windows, and when they do not.
Coloured uPVC sash windows
Grey, woodgrain foils and dual colour: which look most like timber from the pavement.
Draughty, rattling sashes
How to tell when an old sash is worth repairing and when it is better replaced.
Sprayed to any classic RAL shade, or matched to a Farrow & Ball colour.
Building Regulations certificate issued to you on completion.
Cover that stands behind the work even if we are not there to honour it.
British-made throughout, to your measurements. Nothing imported.
The window
ECOSlide®, made to your measurements.
Sliding sash is the whole business. Every window we supply is an ECOSlide® sash, made to measure to your sizes and finished to your order, never cut down from a stock range.
Made to measure to virtually any requirement: sprayed in any classic RAL colour or matched to Farrow & Ball, realistic woodgrain foils, shaped and arched frames, custom glass, and eight hardware finishes from chrome to antique gold.Sash Window Factory
Brochures & downloads
Download it now. No form, no email address.
Everything you need to choose a window, price a plot or write a specification. Straight download, nothing gated.
A+ rated · PAS 24: 2022 · Secured by Design · FENSA registered · 10 year warranty
Get a free quote for your sash windows.
Tell us where you are and roughly how many windows. We will come back with a written quote, no appointment needed and no salesman on your sofa.
Call us0800 861 1450Mon to Fri, 9am to 5pm