Aluminium Windows
in Chester, Deeside
& North Wales
Slim-sightline aluminium windows in Alunet profiles — bigger glass, thinner frames and a 25-year lifespan, installed by a team that's been fitting windows in this area for over 30 years.
Aluminium Windows — the honest version
What it is
Aluminium windows use a thermally-broken aluminium frame with a polyamide barrier between the inside and outside profile. That gives you the strength to span very large apertures with almost invisible sightlines — glass instead of frame.
Who it's for
Homeowners who want maximum light, contemporary extensions, barn conversions, and heritage properties where the original crittall-style steel windows need a modern replacement that keeps the same slim look.
When to book it
Choose aluminium if you want floor-to-ceiling glass, large opening lights, black or anthracite frames on a modern facade, or you're replacing rotten steel/timber crittall windows.
Why it matters who fits it
Aluminium is unforgiving to fit — the tolerances are tighter than uPVC and the finish is exposed. We fit Alunet profiles because the powder-coated finish holds up and the thermal break performs as claimed.
What happens if you leave it — and what most people get wrong
Cheap aluminium windows are worse than cheap uPVC. Get the thermal break wrong and you'll get condensation on the inside of the frame — the opposite of what you paid for.
- •Poor thermal breaks cause cold-bridging: water beads on the inside frame every winter morning.
- •Uncoated or badly powder-coated frames pit and chalk within 5 years, especially near the coast.
- •Oversized fixed panes without correct structural glazing can flex, stress the seal and eventually crack.
- •Slim frames need precise fitting — a 3mm out-of-square fit will bind the hinges and stress the mechanism.
- •Buying on price from a trade supplier without an installer who understands aluminium tolerances.
- •Choosing dark grey or black without specifying solar-control glass — dark frames absorb heat and cook the seals.
- •Skipping a polyamide thermal break to save money, then getting condensation and heat loss.
- •Fitting oversized units without structural glazing sign-off.
Five steps, no surprises
Every install runs the same way. It's how we hit 3-week lead times on standard jobs and 48-hour survey turnaround.
Free On-Site Survey
We come out within 48 hours of your enquiry, measure every aperture accurately and check reveals, sills, lintels and drainage. No pressure, no gimmicks.
Written, Itemised Quote
You get a fully itemised quote — profile system, glass spec, colour, hardware and finish. Composite doors back in 24 hours, windows typically within 3 days.
Order & Manufacture
Once approved, we place the order with our trade suppliers. Standard windows and doors run ~3 weeks, bespoke items 4–5 weeks. Stock composite doors 7–10 days.
Expert Installation
Our own installers fit every job. Frames set square and plumb, sealed with low-modulus silicone and expanding foam, internal beading, no drafts or gaps.
Testing & Handover
Every window and door is tested for operation, locking and seal. Site left clean, old frames removed, care advice given, guarantees registered with Assure.
What you actually get — not marketing talk
Slim Sightlines
Alunet profiles give you 20–35% more glass area than equivalent uPVC — the view opens right up.
Very Long Lifespan
Powder-coated marine-grade aluminium routinely lasts 25+ years with no repainting and no discolouration.
Large Aperture Capable
Aluminium can span openings uPVC can't structurally support — critical for open-plan extensions and picture windows.
Any RAL Colour
Choose any RAL number — dual colour available so you can have anthracite outside and white inside.
Genuine Thermal Break
Polyamide thermal break with A-rated glass gets you U-values comparable to premium uPVC.
Low Maintenance
A wipe down twice a year is it — no painting, no swelling, no shrinking.
How we spec & fit aluminium windows
Aluminium windows are a system, not just a frame. The profile, thermal break, gasket, glass and hardware are engineered together — and the installation detail decides whether it performs.
Materials & systems
Alunet Profile
British aluminium window and door system with a polyamide thermal break, marine-grade powder coating and multi-chambered profile. Available flush casement and traditional.
Powder-Coated Finish
Qualicoat Class 2 powder coating in any RAL colour. Matt, satin or textured. Dual-colour (different inside/outside) is standard, not extra.
Structural Sealed Units
28mm double-glazed or 44mm triple-glazed units with warm-edge spacers, low-e coating and argon or krypton fill.
Hardware
Concealed hinges, discreet handles, multi-point locking as standard, PAS 24 tested against forced entry.
How we install
- Frames set with structural fixings into brick, block or steel — never packed on foam alone.
- Thermal break kept continuous around the frame; any cut or bridge is a cold spot in the making.
- Silicone applied to a primed substrate — aluminium doesn't grip mastic the way uPVC does.
- Drainage checked on every sill; blocked slots are the number one cause of aluminium 'leaks' (it's actually trapped condensation).
- Glass loaded with the correct setting and location blocks so the sash doesn't drop and bind the lock.
Variations & options
Flush Casement
Sash sits flat with the outer frame — cleanest, most contemporary look. Popular on new-builds and extensions.
Traditional Casement
Sash proud of the frame with a bevelled edge. Suits older properties and replacement of timber casements.
Crittall-Style
Slim black-framed aluminium with astragal bars — the modern equivalent of steel Crittall windows for warehouse conversions and industrial-look extensions.
Fixed Picture Windows
Non-opening large panes — the maximum glass, minimum frame option for feature apertures.
Corner Windows
Structural corner posts hidden inside the frame, giving a glass-to-glass corner without a visible mullion.
Situations we typically fit this for
- Rear kitchen extensions with wide picture windows and matching bi-folds or sliders.
- Barn conversions where the aperture is oversized and needs slim frames to keep the view.
- Heritage steel Crittall replacements where thin sightlines matter more than anything else.
- New-build homes where the architect has specified anthracite grey aluminium as standard.
- Coastal properties where uPVC and timber both weather badly.
Aluminium Windows we've fitted across Chester & North Wales
Real jobs — measured, ordered and fitted by our own team.
Aluminium Windows — your questions answered
How much do aluminium windows cost compared to uPVC?
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Aluminium costs more than the equivalent uPVC. The uplift buys you slimmer frames, larger apertures and a longer lifespan. We price both options at survey so you can compare like for like.
Are aluminium windows warm enough for UK weather?
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Yes — modern thermally-broken aluminium with A-rated glass hits U-values around 1.4 W/m²K, well within Building Regs and comparable to good uPVC.
Can I get any colour?
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Any RAL number — matt, satin or textured. Anthracite grey (RAL 7016) and jet black (RAL 9005) are our most popular. Dual-colour is included.
How long do aluminium windows last in Chester's weather?
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25+ years on the frame, 15–20 on the sealed units. Powder coating doesn't fade or chalk the way old wet-paint finishes did.
How long is the lead time?
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4–6 weeks from order for standard colours; 6–8 for bespoke RAL colours or oversized units. Installation itself is 2–4 days for most houses.
Do aluminium windows suit older properties?
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Yes, particularly heritage steel replacements and stone-mullioned properties where slim frames read correctly. We survey to advise before you commit to a style.
What guarantee do you provide?
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10 years on the frame and finish, 5 years on the glass units, plus the Assure Insurance-Backed Guarantee that transfers with the property.
Can aluminium replace my old Crittall windows?
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Yes — this is one of the most common uses. Modern aluminium gets you the same slim look with a proper thermal break and multi-point locking.
Will condensation form on the inside?
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Not on properly specified thermally-broken frames with A-rated glass. It's a hallmark of a cheap unbroken profile or a poorly ventilated room.
Do you fit aluminium windows across all of North Wales?
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Yes — Chester, Deeside, Mold, Buckley, Flint, Wrexham, Ellesmere Port, Neston and the surrounding villages.
Get an Aluminium Window Quote That Isn't Guesswork
We survey, spec the right profile for your aperture and colour, and price it in writing. Free within 48 hours, no pressure.
Other things we fit for homes across the region
Fitted across Chester, Deeside & North Wales
Family-run installer based in Ewloe, roughly 30 miles across the border into North Wales and Cheshire. Prefer a chat first? Call 07946 759187 or book a free survey.