Window wizardry

•  Rub out window scratches with toothpaste

Squeeze a small amount of toothpaste onto a soft cotton cloth and vigorously polish the scratch for a minute or two. Wipe off the excess with a damp rag and the scratch should be gone. Be sure to use plain white paste — no gels or striped varieties. You can also use an extra-whitening toothpaste or tooth powder; most have higher amounts of abrasive.

•  Stop cracks in their tracks

You can buy yourself some time before replacing a cracked window by applying a couple of coats of clear nail polish over the crack on both sides of the window. Once dry, the polish should seal any holes in the glass and contain the damage.

•  Stifle a rattle with a matchbook

A rattling sash window is bound to rattle your nerves, especially when you’re trying to sleep. Silence the racket with a small folding book of matches. Slide the thin end of the matchbook in between the sash and the loose corner of the window frame. Wedge it in as far as you can, but leave at least a third of the matchbook exposed for easy removal. Then give the window a few light tugs to make sure it won’t shake on blustery nights.

•  Plug a draughty window leak

A draughty window is guaranteed to suck out precious heat from your home and raise your fuel bills. What can you do if it’s winter and you don’t have a sealant gun (or the one you have has dried up)? It’s simple. Once you’ve located the source of the draught (it’s often along the top of the lower sash or in a corner between the sash and window frame) take two paper towels, sandwich them together, and fold them up from the bottom 25mm at a time until you have a thick padded strip. Lay the pad over the air leak and secure it on all sides with masking tape.

•  Straighten that sag

Hinged windows can sag when corner joints have weakened. A quick fix is to add flat L-shaped steel corner plates, which cost very little, with matching countersunk screws. From the outside, with the window closed, drive wooden wedges between the window and its frame to close up any loose joints (or to raise a dropped window), and simply screw the plates in place over the corners. Apply metal primer and topcoat to prevent the plate rusting.

•  Removable secondary glazing

If you have single-glazed windows, you can halve the heat lost through them by fixing plastic-sheet double glazing. The plastic sheet can be ordered cut exactly to size and is held in place with a magnetic strip secured to the window and a matching metal strip secured to the frame. The strips need to be cut to length (with sharp scissors or a utility knife) and the backing paper peeled off as they are applied. Unlike film double glazing, sheet glazing can be applied just to the window (so it still opens) and it can be removed in summer when it’s no longer needed.