How to Replace a Window

Whether you’re renovating your home or just simply want to replace your old windows, removing a window can be a long process. This is especially the case if window removing is not your forte, which is why it’s always best to consult a professional. For those who’d like to complete the job by themselves, here are the steps you can follow. However, remember to wear protective gear such as goggles and gloves before you tackle the job.

Removing a window

Unscrew your window at the hinges

The first step is to unscrew your window at the hinges. To remove the panes, separate the window beading and putty. You should then create an angled cut on the upright frames using a handsaw. When you need to lift them out, make sure you ask another person for help.

Remove the frames

Once the first step is done, the next step is to remove the frames. You can do this by using a long bar (or a bolster chisel) and a club hammer. To remove the frames, insert the curved end of the long bar into the cut and pull it outwards. You can then remove the lower frame piece.

Remove the upper part of the frame

Using the curved end of the long bar once again, remove the upper part of the frame. You should then repeat this process on the other side. If you want to replace your window sill, you can remove it by using the same tools.

Cut through the screws

This next step should be done if your frames are fixed into place by screws. You can get this job done by using a mini close quarter hacksaw to cut through the screws.

Installing a new window and sill

Once you’ve removed your old window, you can then install a new one. If you’ve purchased pre-glazed casement windows, they can be heavy to carry by yourself. So, make sure you have someone to help you. It’s also important to note that you need to apply for Building Control approval if you plan to fit the windows yourself. Before installing your new window, you will also need to confirm its energy efficiency level.

Mark your fixing points

When installing a new window, the first step is to mark your fixing points by making a small cut on the plaster. If you’re also replacing the sill, mark both sides. Once done, place your new window and wedge it in with a spacer, which is also called a shim.

Make sure the window is level and vertical

The next step is to make sure your new window is level by using a tool called a spirit level. If it’s not level, you can align it by using the spacers. You can also use your spirit level to check whether your window is vertical. If it isn’t, use the spacers once again to straighten it.

Screw the frame into place

You should then screw the frame into place by drilling a hole and inserting a wall plug into your fixing points. If you plan to add a new window sill, make sure the interior sill fits around the window reveals, which can be done by measuring and cutting it. You should then make sure your new window is level. If it isn’t, you will have to add in some spacers and secure it with masonry nails, screws or a grab adhesive.

Fill in any gaps

If you’ve noticed that your window’s exterior has some wide gaps, make sure to fill it in with expanding foam filler. You should then wait for it to dry before trimming it with a craft knife. If you have smaller gaps, however, you can use a frame sealant to fill it in.

These are the steps you can follow to replace your old window and sill. For help, advice, or for any enquiries, feel free to get in touch with our window experts from our directory here. Alternatively, you can also contact our window services from our directory here.

For other articles on windows, our article on How to Keep UPVC Windows Clean might be of interest.

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