Steel windows
Steel windows are window frames made from hot-rolled steel sections, galvanised against corrosion and powder coated, then double glazed. Steel is strong enough to hold large panes in very slim frames, which is why steel windows have the narrow sightlines that timber and uPVC cannot match.
How steel windows work
Modern steel windows use thermally improved sections and sealed double-glazed units, so they can meet current energy rules for replacement and new windows. They suit contemporary extensions as well as period homes, and they can be made with side-hung, top-hung or fixed lights in any combination.
Every window is galvanised before it is powder coated, which protects the steel from the inside of the section outwards. We survey the openings, check the building regulations route, and fit with weather seals and finishing trims to suit brick, render or timber cladding.
What you can specify
- Thermally improved steel sections with double glazing
- Hot-dip galvanised, then polyester powder coated
- Side-hung, top-hung, fixed and casement combinations
- Glazing bars as true divided lights or applied bars
- Secure multipoint or espagnolette locking options
- Trickle vents where ventilation rules require them
- Any RAL colour; black, bronze and grey are popular
What happens after you get in touch
Tell us about the opening
Send the form, call or chat, or use the guide-price tool for a quick estimate.
Free survey
We measure the opening, check fixings and regulations, and talk through layouts, glass and finish.
Drawings and fixed quote
You get a drawing and a fixed written price naming the material, glass and finish.
Made and fitted
Your screen is fabricated, powder coated and fitted by our team, usually 4 to 6 weeks from sign-off.
Questions about steel windows
How much do steel windows cost?
Steel windows usually cost £1,400 to £3,500 per window fitted, including VAT. Large fixed lights, curved bays and heritage detailing cost more. We quote the whole house after survey.
Are steel windows energy efficient?
Modern thermally improved steel windows with double glazing can meet the energy rules for replacement windows in England, which currently set a U-value of 1.4 W/m²K or better. We confirm the figure for your specification.
Do steel windows rust?
Steel windows are galvanised and then powder coated, which protects them well. Keeping drainage clear and touching up any chips keeps them in good condition for decades.
Do I need building regulations approval for steel windows?
Replacement windows must meet building regulations for energy, ventilation, safety and fire escape. The work is signed off through a competent person scheme or building control, and we explain the route for your job.
Can steel windows be used in a new extension?
Yes. Steel windows and glazed walls are a popular choice for rear extensions, and they can be detailed to match steel doors in the same opening.
How long do steel windows last?
Well-maintained galvanised and powder-coated steel windows have a long service life, and the frames can be recoated in future rather than replaced.
Steel windows near you
We survey and fit steel windows across England, Wales and Scotland. Choose your county for local details.
- London
- Surrey
- Kent
- East Sussex
- West Sussex
- Hampshire
- Berkshire
- Buckinghamshire
- Oxfordshire
- Hertfordshire
- Essex
- Bedfordshire
- Cambridgeshire
- Norfolk
- Suffolk
- Lincolnshire
- Bristol
- Somerset
- Gloucestershire
- Wiltshire
- Dorset
- Devon
- Cornwall
- West Midlands
- Warwickshire
- Worcestershire
- Staffordshire
- Shropshire
- Herefordshire
- Leicestershire
- Nottinghamshire
- Derbyshire
- Northamptonshire
- Greater Manchester
- Cheshire
- Merseyside
- Lancashire
- West Yorkshire
- North Yorkshire
- South Yorkshire
- East Riding of Yorkshire
- Tyne and Wear
- County Durham
- Northumberland
- Cumbria
- Cardiff and the Vale
- Swansea and Neath
- Newport and Monmouthshire
- North Wales
- Mid and West Wales
- Edinburgh and the Lothians
- Glasgow and Clyde
- Aberdeen and Aberdeenshire
- Fife
- Dundee and Angus
- Stirling and Perth
- Highlands
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Book a free survey
Tell us about your opening and we will arrange a survey and a fixed written quote.