We fitted aluminium windows during our kitchen renovation after widening the rear opening, and the slim frames made the room noticeably brighter. I was worried they might feel cold, but the thermally broken frames and proper glazing solved that. The installer mattered just as much: one window needed a small adjustment after the first windy night. I’d compare frame specs, guarantees and fitting reviews.
Aluminium windows Uxbridge is worth putting on your shortlist, alongside a couple of local firms.