One warning sign usually = £15–£200 repair. Three or more together usually = full replacement. Honest UK guide to which signs matter, how serious each one is, and the simple repair-vs-replace rule.
U-value matters more than WER for cold UK winters. 1.4 is the legal minimum; 1.0 is the realistic premium. Plus the 4 hidden specs (warm-edge, argon, low-E, thermal break) that affect performance more than installers admit.
Three types of window condensation — inside, outside, and between the panes — each with totally different causes and fixes. Here’s how to spot which is which and what to do about it.
Most window draughts can be fixed for £15 — gaskets, hinges, brush seals. Full replacement is only worth it when 5+ windows are draughty AND the frames are failing. Here’s how to tell which.
Double glazed window frames last 20–35 years; the sealed glass units inside them usually fail at 10–25 years. Here’s how to tell when yours need replacing — and when a £40 repair will do.
Misted-up double glazing? Replacing just the sealed unit costs £40–£80 per pane; full window replacement is £300–£700. Honest UK guide on which option to choose, who to use, and warranty pitfalls to avoid.
