Steel or aluminium: which is better for a Crittall-style screen?
Solid steel gives the slimmest frames and the most authentic look; steel-look aluminium gives almost the same appearance for around 40 percent less, at a third of the weight. For most homes aluminium is the practical choice, and steel is worth it where sightlines and heritage matter most.
Updated October 2026
How do they compare on looks?
Steel profiles are slimmer because steel is stronger, so the same opening can have finer bars. Aluminium frames are a few millimetres deeper. From across a room the difference is hard to spot; close up, steel feels heavier and more solid.
How do they compare on price?
Steel-look aluminium is usually around 40 percent cheaper per square metre for internal screens. The gap is similar for external doors and windows.
Which lasts longer?
Both last decades when properly finished. Internal frames see little wear. Outside, both rely on good powder coating and maintenance of seals and hardware.
Which is quicker to make?
Aluminium is usually a little quicker, at around 4 to 5 weeks from signed-off drawings, compared with about 4 to 6 weeks for steel.
Which should I choose?
Choose steel for listed or heritage work, very large panes where you want the thinnest bars, and fire-rated screens. Choose aluminium for most internal screens, large or heavy installations upstairs, and when budget matters.