Sash windows
Sash windows are a defining feature of period homes across Britain — elegant sightlines, slim meeting rails and balanced proportions that lift any façade.
★★★★★4.9 from 278 Google reviews
Today’s designs keep that timeless look while delivering warm, quiet and secure living. Our range of sash windows and uPVC sash windows combines authentic detailing with A-rated performance, smooth sliding action and tidy, FENSA-certified installation. Whether you’re planning sash window replacement for a whole house or upgrading a few rooms, we’ll tailor profiles, glazing and colours so everything feels made for your property.
Our sash window options at a glance
- UPVC sash windows with authentic proportions, slim meeting rails and optional deep bottom rails
- Box sash windows for period elegance with smooth, low-maintenance operation
- Timber look sash windows that replicate painted wood with realistic woodgrain foils
- Heritage sash windows for conservation-sensitive streets, featuring slim glazing bars and discreet hardware
Every option is available in A-rated configurations with double glazing as standard, plus upgrades like acoustic laminates or selective triple glazing for noise-sensitive rooms.
Why homeowners choose uPVC sash windows today
Traditional timber looks wonderful but demands sanding, painting and regular upkeep. uPVC sash windows deliver the look without the chores:
- Low maintenance — a wipe-clean frame and a light oil on moving parts keep everything running
- Excellent thermal performance with low-E glass, argon gas and warm-edge spacers
- Smooth sliding action using modern balances rather than cords and weights
- Tilt-in cleaning positions on many models for hassle-free access to exterior glass
- Robust security with multi-point locks, reinforced sashes and optional laminated glass
If your original windows are tired, noisy or draughty, sash window replacement in uPVC can transform comfort while preserving kerb appeal.
Heritage-sensitive sash windows for character homes
Living in a conservation-aware area doesn’t have to mean compromising comfort. Our heritage sash windows are designed to respect original architecture:
- Fine sightlines that echo 19th-century joinery
- Authentic astragal bar layouts, including Georgian and Victorian patterns
- Deep bottom rails and run-through horns for period correctness
- Wood-effect finishes in popular shades like White Woodgrain, Cream, Golden Oak and Irish Oak
We’ll advise on sympathetic specifications and, if required, help you navigate permissions with clear, supporting details for your local authority.
Box sash windows — authentic style, modern reliability
Box sash windows take their name from the box frame that historically housed cords and weights. Modern versions capture the same visual rhythm while using reliable spring or spiral balances for smooth, controlled travel. Choose equal sightlines for a balanced appearance across bays and multi-light windows, and add traditional hardware — sash lifts, pole eyes and locking fasteners — in finishes that complement your interior.
Energy performance you can feel
Great sash windows do more than look the part. Our systems combine:
- Multi-chambered uPVC frames that slow conductive heat loss
- Low-E coated double glazing to reflect warmth back into the room
- Argon-filled units and warm-edge spacers to achieve low U-values and reduce condensation risk
- Precision brush and compression seals to minimise draughts around the sashes
The result is a home that feels warmer in winter, cooler in summer and calmer day-to-day, with fewer cold spots near the glass.
Security without compromise
Security is built into our sliding sash windows. Expect strong interlocks at the meeting rails, robust keeps, high-spec balances and discreet reinforcement where needed. Upgrades include laminated security glass on ground-floor windows and child-safety restrictors on upper floors, so you can ventilate safely. You enjoy period looks with modern protection.
Colours, finishes and details
Beyond classic white, choose subtle neutrals and popular heritage tones. Woodgrain foils create convincing timber aesthetics without the upkeep, and dual-colour options let you keep interiors bright while selecting bolder exterior shades. Finish the look with:
- Astragal or internal glazing bars in traditional layouts
- Deep cills and neat end caps for crisp lines
- Hardware in chrome, satin, brass or black to match handles and door furniture
These details are what make sash windows look original rather than “replacement”.
Glazing options — privacy, solar control and acoustic comfort
Your glass choice shapes everyday living:
- Privacy patterns for bathrooms and overlooked elevations
- Toughened safety glass for low-level panes and doorside windows
- Acoustic laminates to quieten bedrooms facing busy roads or flight paths
- Solar control tints for south- and west-facing rooms that overheat in summer
We’ll help you balance light, privacy, sound and cost for each room.
Sash window replacement — how we make it simple
Advice and design
Tell us what you want to achieve — warmer rooms, quieter nights, faithful period style — and we’ll design sash windows that deliver. We explain options clearly and provide an itemised quote.
Detailed survey
We take precise measurements, confirm bar layouts, cill depths and opening configurations, and check for plaster lines and reveals so the finish looks intentional.
Made-to-measure manufacture
Your uPVC sash windows are built to your chosen specification, including colour, glass, hardware and heritage details.
FENSA-certified installation
Our trained team protects floors, removes old frames, installs and seals new sliding sash windows, and tidies thoroughly. You receive your FENSA certificate and warranty paperwork.
Aftercare and maintenance
We show you tilt-in cleaning, locking and vent positions, and share simple maintenance tips. If adjustments are ever needed, we provide responsive support.
What customers say
Rated 4.9 out of 5 on Google and Trustpilot
Your free quote
Your free quote.
Tell us a little about your home and we will call to talk it through and arrange your free survey.
- Quick and free. Just your name, number and postcode.
- A friendly chat, not a sales pitch. We’ll call to talk through your project and answer your questions, then arrange your free home survey.
- Prefer to ring us? Call free on 0800 233 5576, Monday to Friday 9am to 5pm.
Get your free, no-obligation quote
Leave your name, number and postcode and one of our local team will call you to arrange your free home survey.
★★★★★“Extremely efficient, professional and helpful company.”Sarah Thomas, Google review · 4.9 from 278 reviews
Questions
Your questions, answered
How long do uPVC sash windows last?
With quality manufacture and proper installation, expect 20–35 years of service, depending on exposure and maintenance. Regular cleaning and light lubrication keep everything smooth.
Can sliding sash windows be made to look like timber?
Yes. Timber look sash windows use realistic woodgrain foils, deep bottom rails, run-through horns and authentic bar layouts to mimic painted wood convincingly.
Will new sash windows reduce noise from the street?
They can make a noticeable difference. Precision seals and modern glazing cut general noise; for busy roads, specify acoustic laminated glass in bedrooms and living spaces.
Are sash windows secure?
Modern systems include robust locks, reinforced meeting rails and secure keeps. Laminated security glass adds further protection on vulnerable elevations.
Do I need permission to replace sash windows?
Like-for-like replacements usually don’t need planning permission, but Building Regulations still apply. In conservation areas or on listed properties, extra consents may be required — we’ll advise.
Ready to plan your sash windows?
Tell us about your home and goals — faithful period style, better insulation, quieter nights — and we’ll design a tailored specification of sash windows or uPVC sash windows to suit. From measured survey to tidy, certified installation and aftercare, we make sash window replacement simple, sympathetic and built to last.
Ready to talk about your home?
Leave your details and one of our local team will call you, or ring us free on 0800 233 5576.
★★★★★4.9 from 278 Google reviews