Heritage aluminium windows with the steel look

Heritage aluminium windows give you the slim frames and glazing bars of traditional steel windows, made in aluminium with modern double glazing. We supply and fit them on Smart Alitherm Heritage across London, inside the M25 and in nearby towns, working from our base in Hayes. Every installation is made to measure, fitted by our team and covered by our 10-year installation guarantee.

Alitherm Heritage: the steel look in aluminium

Alitherm Heritage is a window and door system from Smart Architectural Aluminium, a British aluminium systems company. It was designed to replace old steel windows without losing what made them distinctive: narrow frames, slim glazing bars and a crisp, flat profile.

Real steel windows are beautiful, but old ones rust, distort and are almost always single glazed. Aluminium does not rust, does not need painting and takes double glazing, while keeping the look.

Steel look windows for period houses

A great many London houses were built with steel windows, from 1930s semis and Art Deco blocks to cottages and conversions. Steel look windows let you replace failing frames with something that still belongs on the house. We match the layout of the glazing bars to the original pattern where we can, so the front of the house keeps its character.

The difference inside is just as noticeable. Old steel windows are often the coldest surface in the room, running with condensation in winter and rattling in the wind. Double-glazed aluminium frames close tightly onto their seals, so rooms that used to feel draughty are warmer and quieter, without giving up the look that made the house worth buying.

Crittall-style windows and doors for extensions

The same look has become popular on new extensions, kitchens and garden rooms. When people search for crittall style windows, crittall style aluminium windows or crittall style aluminium doors, this is usually what they have in mind: black frames, a grid of slim bars and a lot of glass.

To be clear, we do not fit Crittall products. Crittall is a brand name; “Crittall-style” is simply the description most people use for the look. What we fit is Alitherm Heritage aluminium, which gives the same appearance with modern glazing.

Heritage aluminium doors and steel look doors

Alitherm Heritage includes heritage aluminium doors, and we confirm what we can supply for your opening with your quote. A steel-look door or internal screen can sit between a kitchen and a dining room, or open an extension onto the garden. Steel look doors work well where a wide bifold would look too modern for the house, and they pair naturally with aluminium French doors if you want a traditional double door.

What affects the price

We do not publish prices. Heritage windows are priced from the number and size of openings, the glazing bar layout, which panes open, the colour, the glass and the hardware. Doors and screens are priced the same way. Send us photos and rough sizes and we will quote for your actual windows.

Send us your windows

Send photos and rough sizes through the quote form or on WhatsApp and we aim to reply the same working day, Monday to Friday, 8am to 5pm. If you do not need the steel look, our standard aluminium windows on Smart Alitherm 400 give slim frames without the glazing bars.