Window Repair

By far the most common window problem is a cracked or broken pane, caused by a flying object or by the window being allowed to slam. Make a temporary repair to cracked glass with a clear waterproof repair tape not household adhesive tape – but aim to replace the pane at the earliest opportunity. If the glass is broken, lift out all the loose pieces for safety’s sake and make a temporary repair by fixing heavy-duty polythene (polyethylene)sheeting or a piece of board over the opening to keep out the cold.

When measuring up bar the replacement glass, measure all four sides in case the rebate in the frame is not perfectly square, and use the smaller of each pair of figures. Subtract 3 nun/

Vs in from each one to allow for clearance all around, and note which way the pattern ran if the glass was obscured rather than clear. Take a piece of patterned glass with you when buying a replacement, so as to be sure of getting the correct type.

The other problems that windows suffer from are similar to those affecting doors– paint build-up, expansion and warping. They may also pull out of square if the frame corner joints start to open up, causing the casement to bind in its frame and possibly also cracking the glass. The trouble can be cured by strengthening the frame corners with small L-shaped metal repair plates; cut shallow recesses for them and disguise their presence with filler (spackle) and a coat of paint.


1. When a window breaks, remove all the loose glass immediately for safety’s sake. Wear stout gloves to protect your handstand dispose of the glass safely

2. Use an old chisel or a glazier’s knife to remove all the old putty from the rebate in the frame. Take care not to cut into the wood while doing this.

3. Use a pair of pincers or pliers to pull out the old glazing sprigs. Metal frames have glazing clips; save these and re-use them.

4. Knead some putty with your hands toward and soften it, then press it into the rebate by extruding it between your thumb and forefinger.

5. Set the replacement pane m position against the bedding putty with equal clearance all around, and press it into place mound the edges to compress the putty.

6. Secure the pane in the rebate by tapping in glazing sprigs at roughly 30 cm/12 in intervals. Replace clips in their locating holes in metal frames.

7. Repeat step 4 to extrude a bead of putty all around the pane, then neaten it to a45′ bevel by drawing the blade of a putty knife along it.

8. Trim off excess putty from the outside and inside of the pane and leave it to harden for about14 days before painting over it to disguise and seal the joints.


1. If a build-up of paint is causing the edge of the casement to hind against the frame, strip it hack. Use chemical strippers for this, as heat may crack the glass.

2. If the Ionic has swollen because of moisture penetration, plane a little wood off the leading edge. Prime and paint it immediately to keep the wood dry.

3. If the corner joints of a casement show signs of opening up and the frame is pulling out of square, screw on small L-shaped metal repair plates.