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Slimline Aluminium Windows in Warrington & Cheshire

Aluminium windows do one thing that no other frame material can: they hold a large pane of glass in a frame narrow enough that you stop noticing it. On a wide opening the difference against uPVC is dramatic — more daylight, a cleaner elevation, and a window that reads as architecture rather than as a replacement.

Everything is made to size and fitted by us throughout Warrington and Cheshire. Windows, French doors and single doors, all in the same profile system so the whole elevation matches.

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Where aluminium windows make the most difference

Not on every window in the house, necessarily. Aluminium earns its cost in specific places:

Large openings. Anything over about 1.5m wide, where a uPVC frame has to get chunky to stay rigid and an aluminium one doesn’t.

Rear elevations and extensions. Where the windows sit alongside bi-fold or sliding doors, and you want the frames to match rather than clash. This is the most common reason our customers move to aluminium — they’ve had the doors done, and the old white uPVC window next to them now looks wrong.

Anywhere you want dark frames. Dark uPVC is a foil laminate over white plastic; the white shows at every cut edge and in every reveal. Powder-coated aluminium is coloured through the finish and looks right from every angle.

Steel-look replacements. Period properties with original Crittall-style windows can be replaced in slim aluminium with matching bar layouts, keeping the character without the rust and single glazing.

Window styles

Casement windows

The standard for most UK homes — hinged at the side or top, opening outwards. We supply them in any combination of fixed lights, side-hung openers and top-hung vents. The slim aluminium profile means the transom and mullion bars are narrow, so a three-light casement doesn’t end up looking like a grid.

Tilt and turn

Tilts inwards at the top for secure ventilation, or swings fully inwards for cleaning and escape. Genuinely useful on first floor and above, and on anything overlooking a path or a driveway where an outward opener would be in the way.

Fixed lights and picture windows

Where you want glass and nothing else. Because there’s no opening mechanism, the frame can be at its slimmest and the pane at its largest. Usually paired with an opener elsewhere in the same run for ventilation.

Aluminium French doors

Two doors opening from a central mullion, or from a slim rebate where you want the clear opening uninterrupted. French doors suit narrower apertures — 1.2m to 1.8m — where a bi-fold would be over-engineered and a slider wouldn’t open enough. They also suit period and traditional elevations better than a folding door does. Side lights and top lights can be built into the same frame so the whole assembly reads as one opening.

Bay and corner windows

Aluminium’s structural strength means bays can be built with slim corner posts, and true corner windows — glass meeting glass at 90° with no post at all — are possible on new-build and structural openings.

Performance

Thermally broken profiles. A polyamide barrier through the frame separating inside from outside. Without it, aluminium is a heat sink; with it, it performs.

Glazing. 28mm double-glazed units as standard — low-emissivity soft coat, argon-filled cavity, warm-edge spacer bar. Triple glazing available where you want it, and acoustic laminated units where you’re on a busy road.

Building Regulations. Approved Document L requires a replacement window in an existing home to achieve 1.4 W/m²K or better, or a Window Energy Rating of band B or above. Everything we fit is specified to meet or exceed that, and we register the installation for you.

Ventilation. Trickle vents are integrated into the frame head rather than bolted on, and are now a Building Regulations requirement on most replacement window work.

Exact glazing specification is confirmed at survey — the right unit for a north-facing bedroom is not the right unit for a west-facing kitchen.

Recent aluminium window installations

Dark grey aluminium windows on a house exteriorAluminium windows fitted to a rendered houseAluminium window seen from inside a roomGrey framed windows and doors along a rear elevationWindows and doors fitted to a red brick rear elevationGlazed doors and windows on a rear elevation

Security

Multi-point espagnolette locking on every opening light, with mushroom cams engaging into steel keeps. Toughened glass where the Regulations require it — low-level glazing, doors and side panels — and laminated available throughout. Aluminium’s advantage here is simple: a frame that can’t be flexed can’t be levered.

Colours

Over 200 RAL colours, powder coated to order.

  • RAL 7016 Anthracite Grey — the default, and the safest choice if you’re matching future work
  • RAL 9005 Jet Black — for steel-look and contemporary elevations
  • RAL 9010 Pure White — where you’re matching existing uPVC elsewhere on the property
  • RAL 7039 Quartz Grey and RAL 7012 Basalt Grey — softer alternatives to anthracite
  • Dual colour — dark outside, light inside, so the frame disappears against a plastered reveal

Matt, satin and textured finishes throughout. Heritage and metallic finishes are available for period and specification work.

Aluminium or uPVC?

We fit both, so here’s the honest comparison rather than the sales version.

Aluminium uPVC
Frame width Slim Noticeably wider
Glass area More Less
Colour Through-coloured powder coat, any RAL White, or foil laminate over white
Strength Handles large spans Needs steel reinforcement in large spans
Lifespan 40+ years typical 20–25 years typical
Cost Higher Lower
Best for Large openings, dark colours, matching doors Budget-conscious replacement, standard openings

If budget is the driving factor and the openings are conventional, uPVC windows will do the job perfectly well and cost you less. If the window is large, dark, or sitting next to aluminium doors, aluminium is the right answer and the difference is visible from the end of the drive.

Fitted and certified

We survey, make and install. CERTASS registered, so we self-certify against Building Regulations and register the installation for you — your Building Regulations Compliance Certificate follows within about four weeks and is the paperwork your solicitor will ask for at sale.

10-year guarantee on every installation, and we’ll beat any genuine like-for-like quote dated within the last 14 days.

Fitted throughout Warrington, Cheshire and the surrounding areas — Widnes, Lymm, Culcheth, Leigh, Golborne, Chester, Northwich, Knutsford, Wilmslow, Altrincham, Sale and Hale. Alongside bi-fold doors and sliding patio doors in the same profile family.

Frequently asked questions

Not modern ones. The thermal break through the frame stops heat conducting from inside to outside, and a thermally broken aluminium window with a good glazing unit outperforms most uPVC windows fitted before about 2010.

Forty years and up is normal. The powder-coated finish is the same technology used on architectural cladding and holds its colour for decades. There’s nothing in the frame to rot, warp or go brittle.

You can, but you shouldn’t need to — and repainting a powder-coated frame rarely looks as good as the original. If the colour is wrong, having new frames coated correctly is a better answer than painting old ones.

Wash the frames a couple of times a year with warm soapy water, and lubricate the hinges and locks annually. That’s it. No painting, no sealing.

Yes, and it’s one of the most common jobs we quote. Same RAL colour, same finish, same profile family. Bring us a photo and we’ll tell you what you’ve got.

Yes, replacement windows are notifiable work. We handle it — as a CERTASS registered installer we self-certify and register the job, so there’s no separate Building Control application or fee.

Why buy from Exclusive Bifolds

  • 10-year guarantee on every installation
  • CERTASS registered — we self-certify and register your installation, so there’s no Building Control fee
  • We’ll beat any genuine like-for-like quote dated within the last 14 days
  • £100 locks your price against sector price rises
  • Our own installers — no subcontractors, no franchise
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