An aluminium front door is a thermally broken metal door leaf in a metal frame — rigid, dimensionally stable, and unlike a composite door it will not bow in the sun or swell in the wet. Typical fitted cost is £1,600–£2,800.
Specify PAS 24:2022 as a minimum — it is the standard building control requires on new dwellings, and it is a sensible floor on a replacement. That means a tested door set: leaf, frame, hinges, cylinder and locking, tested together as one assembly. A PAS 24 leaf hung in a weak frame is not a PAS 24 door.
Then the cylinder: a TS007 3-star or a Sold Secure Diamond cylinder to resist snapping, which is still the most common forced-entry method on UK front doors. This is a £40 component that defeats a 20-second attack.
A thermally broken aluminium door with an insulated core will typically hit a U-value around 1.2–1.4 W/m²K, which meets the 1.4 W/m²K requirement for a replacement door in an existing dwelling under Part L. A glazed door needs the glass area accounting for — a mostly-glazed door needs better glass to hit the same number.
| Job | Typical cost |
|---|---|
| Aluminium front door supplied & fitted | £1,600 – £2,800 |
Ranges include VAT and installation. Final price depends on size, spec, access and site condition — a survey gives you a fixed number.
Yes, when specified properly: a PAS 24 tested door set with multi-point locking and a TS007 3-star or Sold Secure Diamond cylinder. The cylinder matters as much as the door — cylinder snapping remains the most common method of forced entry on UK front doors.
Composite is usually cheaper and warmer for the money. Aluminium is more rigid, will not bow or swell, allows much larger glazed areas and slimmer sightlines, and takes any RAL colour. If the door is mostly glass, aluminium; if it is mostly solid and budget matters, composite.
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