uPVC Windows on a 1960s new-town home in Caerphilly

The reason Caerphilly homeowners with a 1960s new-town house search for uPVC windows specifically — rather than just "windows" or "doors" — is that spec choice actually matters here. Timber-frame walls need careful frame fixing — long screws into the studs, not the outer skin is the usual driver. Our route runs CF83 weekly, so a survey rarely sits in the diary more than a week. Grass verges take skip weight fine when boarded — check with the council before dropping directly onto turf. Original developer composite slabs often warp under southern sun; a replacement 48mm slab with GRP skin resists. Foil colour on the front elevation reads sympathetic when it lifts a warm undertone from the brick — pure white can look stark. 10-year product guarantee, 2-year fit warranty, lifetime hardware servicing. Sash pockets in the original box are often stuffed with newspaper insulation — worth checking dates for interest but binning safely. Cavity insulation was retrofit-installed on most 30s semis in the 2010s — check for bead migration at the head before the new frame lands. Hardware fails on schedule at year 8–10; upgrading hinges alone during a full re-glaze extends the frame life a decade. Original oak lintels can be scored and treated, not replaced, when they sit sound above a new frame. Stone walls hold thermal mass but radiate cold at the reveal edge; deep frames pull the cold plane further from the room. Stained-glass fanlights above the door can be re-set into a modern composite slab if intact, giving continuity across the swap.