Aluminium doors can be a good alternative if you are looking for a similar aesthetic at a lower price point.

Both aluminium and modern Crittall systems can achieve excellent energy efficiency when thermally broken and fitted with high-performance glazing. The overall performance depends more on the specification than the material alone.

Aluminium systems can be designed to mimic the look of Crittall products, including glazing bars and dark finishes. However, due to the differences in material strength, they generally cannot achieve the same ultra-slim sightlines as steel.

The main difference is the material. Crittall doors are made from steel, which is stronger and allows for slimmer frames and more authentic period detailing. Aluminium doors are lighter and much more cost-effective, but typically have thicker sightlines compared to steel.

It depends on your priorities. Steel (Crittall) is ideal if you want the slimmest frames, a premium finish, and an authentic look—especially for period or high-end architectural projects. Aluminium can be a practical alternative where budget or specific performance requirements are a key consideration.