Windows by frame material
Triple glazed aluminium windows
Aluminium costs more than uPVC, but it lets you have more glass and less frame, in any RAL colour. For triple glazing that strength matters: a big triple pane is heavy, and aluminium carries it without chunky profiles. Choose a system with a deep thermal break, because the frame is where aluminium loses heat.
Summary
Triple glazed aluminium windows use thermally broken aluminium frames, where an insulating strip separates the inside and outside of the frame, holding a three-pane sealed unit. Aluminium is strong enough to carry heavy triple glass in slim frames, which suits large openings and contemporary homes.
What you get
| Frame | Polyester powder-coated aluminium with a polyamide thermal break |
|---|---|
| Glass | Triple unit, argon filled, two low-e panes |
| Typical whole-window U-value | About 0.9 to 1.2 W/m²K, system dependent |
| Colours | Any RAL colour, dual colour available |
| Sightlines | Slimmer than uPVC or timber at the same size |
| Typical lead time | 5 to 7 weeks from survey |
Guide prices
Guide prices per window, supply and fit, including removal of the old window.
Small window
about 600 x 1000 mm (bathroom, landing)
£1,095 – £1,395inc VAT · £910 – £1,160 ex VAT
- Aluminium frame, triple glazed, warm-edge spacers
- Removal and disposal of the old window
- Fitted, sealed and made good inside and out
Medium window
about 1200 x 1200 mm (bedroom)
£1,495 – £1,895inc VAT · £1,245 – £1,580 ex VAT
- Aluminium frame, triple glazed, warm-edge spacers
- Removal and disposal of the old window
- Fitted, sealed and made good inside and out
Large window
about 1800 x 1200 mm (lounge)
£2,295 – £2,795inc VAT · £1,910 – £2,330 ex VAT
- Aluminium frame, triple glazed, warm-edge spacers
- Removal and disposal of the old window
- Fitted, sealed and made good inside and out
Guide prices, supply and fit. The written quote after your survey fixes the price for the specification shown; anything extra is agreed with you first.
Is it right for your home?
A good fit for
- Large openings and corner windows
- Modern and renovated homes
- Coastal homes where a marine-grade finish is specified
Think twice if
- The tightest budgets, where uPVC goes further
- Conservation areas that ask for timber
Options
- Casement, tilt and turn and fixed lights
- Dual colour (different inside and out)
- Concealed or flush sashes
- Acoustic and laminated glass
- Matching aluminium doors
Thermal breaks: the part of the spec to check
Aluminium conducts heat about a thousand times better than uPVC, so a cheap aluminium frame can undo the benefit of triple glass. The thermal break is an insulating strip, usually polyamide, between the inner and outer halves of the profile. Wider breaks and insulated cavities give lower whole-window U-values. Your quote names the system and its whole-window U-value, so you can compare like with like.
Colour and finish
Frames are powder coated in the factory, in any RAL colour. Anthracite grey (RAL 7016) and black are the common modern choices; dual colour lets you have white inside and grey outside. For homes near the sea we specify a finish suited to coastal exposure.
Building Regulations by nation
| Nation | Replacement windows | Sign-off |
|---|---|---|
| England | 1.4 W/m²K, or a Window Energy Rating of band B or better | Competent person scheme or building control |
| Wales | 1.4 W/m²K, or a Window Energy Rating of band B or better | Competent person scheme or building control |
| Scotland | 1.6 W/m²K | No building warrant for a straight replacement; must meet the standards |
| Northern Ireland | 1.6 W/m²K, or a Window Energy Rating of band C or better | No building notice for a straight replacement; must comply |
Full regulations guide, with sources →
Questions about aluminium windows
Are aluminium windows cold?
Not if the frame has a proper thermal break. Modern thermally broken systems with triple glass reach whole-window U-values around 1.0, well inside the Building Regulations limit for replacement windows.
How much do triple glazed aluminium windows cost?
Our guide runs from £1,095 for a small window to £2,795 for a large one, fitted and inc VAT. UK quotes typically sit 20 to 35% above uPVC.
Can aluminium windows take triple glazing?
Yes, and the strength of aluminium suits the extra weight. The system needs a glazing rebate deep enough for the unit, which we check on survey.
Do aluminium windows suit older houses?
They suit many 20th-century homes well. For Victorian and Georgian houses, or conservation areas, timber or heritage-style frames are usually a better match.
Related products
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From £745Big fixed panes for views, with the weight handled properly.
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Tilt and turn windows
From £795Inward-opening windows that tilt to vent and turn to clean.
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Sliding patio doors
From £1,895Big sliding panes in uPVC or aluminium, with heavy-duty rollers.
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Alu-clad timber windows
From £1,395Warm timber inside, a weatherproof aluminium shell outside.
Learn more →Aluminium windows by area
England
- Bedfordshire
- Berkshire
- Bristol
- Buckinghamshire
- Cambridgeshire
- Cheshire
- Cornwall
- County Durham
- Cumbria
- Derbyshire
- Devon
- Dorset
- East Riding of Yorkshire
- East Sussex
- Essex
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- Greater London
- Greater Manchester
- Hampshire
- Herefordshire
- Hertfordshire
- Isle of Wight
- Kent
- Lancashire
- Leicestershire
- Lincolnshire
- Merseyside
- Norfolk
- North Yorkshire
- Northamptonshire
- Northumberland
- Nottinghamshire
- Oxfordshire
- Rutland
- Shropshire
- Somerset
- South Yorkshire
- Staffordshire
- Suffolk
- Surrey
- Tyne and Wear
- Warwickshire
- West Midlands
- West Sussex
- West Yorkshire
- Wiltshire
- Worcestershire
Scotland
Aluminium windows: get your guide price
Use the guide-price tool, or book a free survey for a written quote that fixes the price.