Modern aluminium windows use thermal breaks and high-quality double or triple glazing, which significantly reduce heat loss through the frame. When properly sealed and installed, they can perform comparably to wood in many cases, while offering slim sightlines that let in more natural light.

Very little compared to timber windows — generally a regular wash down with mild soapy water, occasional lubrication of moving parts, and checking seals are all that’s needed. The powder-coated or anodised finishes mean you don’t have to repaint or treat them annually.

Aluminium doesn’t rust like steel does, but it can corrode under certain conditions (for example in coastal locations if coatings are poor). With good powder coating or anodised finish and proper installation, corrosion is very well controlled.

Yes — there are heritage aluminium window designs that mimic traditional timber or steel profiles (slim sightlines, putty lines, etc.) which are often acceptable to planning or conservation authorities. You'll want to ensure that the style, glazing bars, hardware, and finishes match the historic character and follow local regulations.