Replace window glass yourself

It's not too hard to replace window glass yourself, but for DIY glass repairs and window-fixing you'll need the right tools and a bit of confidence. Just follow our step-by-step guide on how to fit glass and succeed in DIY window repair!

There's nothing worse than the sound of glass breaking. But if you're a budding DIYer, to replace window glass is surprisingly straightforward. So instead of waiting for the repairman, why not dust off the toolbox and fix it yourself?

1. To replace window glass, first you'll need to get the right size pane. Make sure you measure it up exactly: it should be a fraction smaller than the actual window opening, so it can fit in the space comfortably.

2. Like any good DIYer, you'll need to gather your tools to replace window glass. These should include work gloves and eyewear to protect yourself, along with a hammer, chisel, pliers, putty knife and putty. You'll also need sandpaper, glazier's points, linseed oil or glass silicone sealant and caulking gun, masking tape, paint brush and fast-drying primer.

3. Once you're ready to begin to replace window glass, the first step is to remove the broken glass, so gloves and eye protection should be worn. If the window is cracked but not broken, criss-cross the pane with masking tape to stop it shattering and place a towel over the glass before hitting it hard with the hammer. You should then be able to remove the broken pieces.

4. Remove the old putty around the edge of the windowpane with the chisel. With the pliers, pull out any glazier's points, which are the small triangular pieces of metal that hold the glass in place. Give the frame a quick sanding to remove any traces of the old putty.
 
5. Paint the frame with a fast-drying primer to seal it and stop the wood from absorbing oil from the fresh putty. Use the silicone, or alternatively roll some putty into a thin string and press it into place around the window frame. Put the replacement glass into the frame and press it firmly into the putty to remove any pockets of air.

6. Next, install new glazier's points by pushing the pointed ends into the putty at about 100 millimetre intervals. To seal the window, use your fingers to press another string of putty into the seam between the glass and the window frame. Dip the flat edge of your putty knife into linseed oil and use it to press the glass firmly into place, then smooth down the surface.

Of course, if you're a first timer when it comes to DIY glass repairs, talk to a glass or hardware supplier for tips on how to fit glass or complete the project. Find one in your area: