It might be tempting to upgrade all the glazing in your home at once, but this could prove very costly. When it comes to windows, it's a good idea to only replace broken, inefficient or single-glazed ones – if you're replacing functional double-glazed windows you're unlikely to see any increase in your home's value.

Plus glazing isn't cheap and it's certainly not an area to scrimp on. New windows can cost thousands, so if yours are in good shape, it's best to leave this project for another time. Keeping them well maintained is always a good idea, though.

35 home improvements that are a waste of money