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A picture depicting a window with architraves framing its edges.

Overview

Sealing your windows is an easy and efficient way to reduce draughts and increase your home’s energy efficiency. We'll show you how in this D.I.Y. guide.

Safety tip: Always wear the appropriate safety equipment (safety glasses, gloves, ear muffs and a mask, for example) and always follow the instructions for the product or equipment.

Steps

1Choose the right weather strip

Selecting the right weather strip is important for creating a good window seal. You need to make sure you achieve a snug fit, so consider the gap size when choosing your weather strip.

There are many types of weather strips to choose from, but rubber window seals or foam strips are the most versatile. They’re suitable for uneven gaps and come in a variety of thicknesses and widths.

A person in a red T-shirt is holding a weather strip in their hand.

2Measure your windows

Measure the height and width of your window frame to work out how much weather strip seal you will need. Add a little extra as you don’t want to run out – that might result in gaps and air leaks.

A Bunnings team member is measuring the windows dimensions for the needed weather strip.

3Cut the weather strip

Once you’re happy with your measurements, cut the weather strip to size. Use sharp scissors for a clean cut to ensure the strip fits perfectly within the frame. If you’re not sure, leave a little more length on the cut. You can always trim it down to size later using a utility knife.

A person in a red T-shirt is cutting the weather strip to fit the window size.

4Apply the weather strip

Before applying the weather strip, clean the window frame. This will ensure the adhesive sticks properly and won’t peel off in a few months’ time. Use a brush and a damp microfibre cloth and clean the frame until it’s spotless.

To apply the weather strip, start in one corner and work your way around the frame, pressing firmly as you go. Don’t pull the strip: that will stretch it out and make it less effective.

A hand firmly presses the weather strip from one corner around the frame.

5Test the window seal

Close the window to check for any draughts. A well-sealed window should have no visible gaps and you shouldn’t feel any cool draughts coming through. If there are any, repeat the above steps and apply more of the weather strip.

A hand holding the weather strip stuck around the edge.

6Looking for more ways to draught-proof your home?

Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.