Aluminium doors — entrance and technical

Aluminium entrance doors combine rigidity (no “oil-canning” on large leaves), insulation and security — three qualities that are hard to reconcile in other materials for large, heavy leaves. The full construction breakdown is in the door systems section; here we gather what’s worth paying attention to when choosing a specific set.

What to look for

• Ud — for warm (entrance) doors, from 0.9 W/m²K
• Burglary resistance class — up to RC3
• Locking — multi-point, with cylinders protected against forcing and drilling
• Threshold — with a limited thermal bridge, with an option to sit flush with the floor
• Hinges and self-closers — matched to the leaf’s weight, so the door doesn’t sag over time

Entrance doors vs. technical doors

PROMOST manufactures doors in two basic construction variants, matched to the opening’s function:

• Entrance doors (warm) — profile with a thermal break, frame depth 75–90 mm, Ud from 0.9 W/m²K, multi-point locking. For main entrances in houses and residential buildings, where both insulation and security matter.
• Technical doors (cold) — without a thermal break, frame depth 50–65 mm, single-point locking, hardware for heavy, high-frequency use. For garages, technical rooms, entrance lobbies and interior partitions — where thermal insulation isn’t required and the priority is durability under intensive use.

Both variants are also available as fire-rated doors — with the same structural rigidity, complemented by the fire resistance (EI) required for escape routes.

Colour and finish

Like premium aluminium windows, doors are available in the full RAL palette, structural colours, and a bi-colour variant — a different colour outside and inside. It’s a practical solution for dark, sun-exposed façades: a colour matched to the façade outside, a lighter shade inside to limit the leaf’s heat gain.