Home Window Repair

In wooden window frames the glass is set into a rebate cut in the frames moulding and is then bedded in putty. Small wedge-shaped nails, known as springs are used to hold the glass in place. Traditionally linseed-oil putty is used for glazing softwood frames. However acrylic-based glazing putty which is fast drying ad more durable can be used instead.

If the glass in the windowpane has shattered leaving jagged pieces set in the putty you will need to grip each piece separately and try to work it loose. Wear thick working gloves and start from the top of the frame. Old putty that is dry will usually give way but if it’s strong it will have to be cut out using a glaziers hacking knife and a hammer.

If the window is merely cracked you will need to put masking tape over the glass and then break it so you can remove it safely.

Next work along the rebate removing the putty and springs with pliers. Clean remnants of old putty out of the rebates then seal the wood with wood primer. Measure the height and width of the opening to the inside of the rebates and have the new glass cut 3mm smaller on each dimension to provide a tolerance for fitting.

Knead a palm sized ball of putty to an even consistency. Press a fairly thin continuous band of putty into the rebate with your thumb. Lower the edge of the new pane into the bottom rebate then press it into the putty all around the pane. Secure the glass with springs. Apply more putty to each rebate on the outside of the glass.

Let the putty set for about three weeks before painting.