Aluminium windows — stiffness for very large glazing
Aluminium does what uPVC cannot: floor-to-ceiling windows, corners without a post, heavy HST lift-and-slide doors and slim profiles in an industrial style. We sell Aluprof systems — from non-insulated to passive-house class.
When aluminium is worth choosing
The thermal break, or why aluminium's Uw can be excellent
Colour: the full RAL palette and textures
Aluminium systems in our range
Uw for a reference window with a triple-glazed unit. We will calculate the exact value for your dimensions and glazing when preparing your quote.
| System | Depth | Uw from |
|---|---|---|
Aluprof MB-45 A system without thermal break — for interior partitions, shopfronts and unheated conservatories. Light, slim and economical. | 45 mm | 2.3 |
Aluprof MB Slimline The slimmest aluminium we offer — a profile styled after industrial loft windows. Maximum glass, minimum frame. | 75 mm | 0.8 |
Aluprof MB Ferroline The look of industrial steel windows in warm aluminium — distinctive, sharp lines for lofts and renovations. | 75 mm | 0.81 |
Aluprof MB-79N A modern system with a good price-to-performance ratio — thermal break, Uw from 0.79. A versatile choice for homes and commercial units. | 79 mm | 0.79 |
Aluprof MB-86 SI Aluprof's bestseller — 86 mm, in ST/SI/AERO variants. Large glazed areas, high rigidity and wide structural scope. | 86 mm | 0.8 |
Aluprof MB-104 HI Passive-house class aluminium — Uw from 0.52 with the right glazing. Certified for passive buildings and large glazed areas without heat loss. | 104 mm | 0.52 |
Frequently asked questions
Are aluminium windows cold?
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Modern systems with a thermal break — no. Aluprof MB-86 SI or MB-104 HI achieve a Uw comparable to the best uPVC and timber profiles. Only aluminium without a thermal break is cold, such as MB-45, which is used inside buildings.
How large a window can be made in aluminium?
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Much larger than in uPVC — single FIX (fixed glazing) sashes of several square metres and HST doors several metres wide are the norm. The exact maximum depends on the system, the glass unit and the wind load; we check it when preparing your quote.
Is aluminium much more expensive than uPVC?
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Yes, for the same dimensions aluminium costs more. It wins where uPVC cannot reach: huge glazing, slim profiles, colour that lasts for decades. For ordinary house windows, uPVC usually works out more sensibly.
Read before you choose
Large glazing: fixed windows, corner glass, floor-to-ceiling units — and HST or PSK for terrace doors
What actually changes with large glazing — price, cleaning, the thermal weak point in the corner, fall-protection rules — and how lift-and-slide (HST) differs from tilt-and-slide (PSK).
Read →
uPVC, aluminium or timber windows? Real differences, not marketing slogans
Which window material to choose: uPVC, aluminium or timber? We compare insulation, stiffness, maintenance and price — plus chamber counts and four uPVC systems in numbers.
Read →
Toughened or laminated glass — and how to choose glazing that keeps street noise out
When regulations require toughened glass and when laminated, and what Rw (C; Ctr) on a quote really means. Why three identical panes do not insulate better than two.
Read →See the other materials too
Configure a window and get a firm quote
Dimensions, layout, opening types, glazing and colour take a few minutes to set in the configurator. A real person answers with a quote within 48 hours — no price ranges, no obligation.