Heritage Steel Doors in London
The Crittall-style external door — matte-black, slim T-bar muntins, industrial warehouse aesthetic — in a thermally-broken aluminium profile that meets modern Building Regulations without the cold-bridge, rust or draught of the original. The right entrance for a warehouse conversion, a modernist rear extension, or a contemporary infill in a period elevation.
Heritage Steel Doors designed around front doors that need to look right on a stucco terrace and secure a family home.
From Chelsea townhouses to Hampstead villas and Ruislip family homes, we install across every London borough — inside the M25 and out. Our surveyors know the quirks of Victorian sashes, Edwardian bays and post-war casements.
Working across London means understanding period detail, party-wall etiquette and permit parking as well as we understand glass. We schedule dust sheets, protection and clean-down like a good building firm should.
SpecificationThermally-broken aluminium heritage profile · 18mm T-bar muntin overlay · Qualicoat Class 2 matte-black powder coat · argon-filled A-rated glazing · concealed multi-point locking
What sets our heritage steel doors apart in London.
Slim T-Bar Muntins
18mm powder-coated aluminium bars in a 3×3, 4×4 or 5×5 grid — the authentic Crittall sightline in a modern thermally-broken frame.
Thermally-Broken Profile
Polyamide thermal break inside the frame lets us hit 1.4 W/m²K on a fully glazed door — U-values the original steel Crittall could never approach.
Matte-Black Finish
Qualicoat Class 2 powder coat in matte anthracite or true jet black — colour-fast for 20 years, no rust, no peeling, no repainting.
Full-Height Side-Lights
Matched side lights and transoms transform a single door into a full-height glazed threshold, with the entire elevation reading as one continuous grid.
PAS 24 Concealed Multi-Point
Multi-point hook locking concealed within the slim frame — the security specification the aesthetic often skips.
Heritage Steel Doors installed across London.
We regularly install heritage steel doors across London. Explore your town for local detail on planning, postcodes and recent work.
Common questions from London homeowners.
- Is a steel-look door actually made of steel?
- No — ours are thermally-broken aluminium in a heritage profile with authentic 18mm T-bar muntins. Real Crittall steel doors rust, cold-bridge and can't meet modern U-value requirements. Aluminium gets you the same sightline without the drawbacks.
- Can I have real Crittall steel doors?
- We can supply and fit genuine Crittall Fendor steel systems where a listed building or specific brief demands them — but they have poorer U-values, and need repainting every 5–7 years. We advise honestly on the trade-off.
- How authentic does the aluminium look?
- At three paces you would not tell them apart from steel. The 18mm muntins, matte-black finish and grid proportions are drawn from measured Crittall drawings. Only if you tap the frame do you hear the difference.
- Are they thermally efficient?
- Yes — 1.4 W/m²K on a fully glazed unit. Original steel Crittall managed around 4.0 W/m²K, which is why every listed-building steel door is fitted with secondary glazing. Ours don't need it.
Related doors services in London.
Book your London survey.
Tell us about your London project. A senior surveyor will call within one working day to arrange a free on-site visit and fixed quote for your heritage steel doors.