How to stop window draughts with weather seals and weather stripping

Adhesive weather seals come in different thicknesses and materials, so choose one that suits the size of the gap you're trying to fill. Foam and rubber window seals are popular options because they compress when the window closes, helping to create a tighter seal.

Check the packaging for the recommended gap size. If the seal is too thin, cold air may still get through. If it's too thick, the window may become difficult to close.

Before buying, check that the draught is coming from a small gap around the window frame. If the frame is damaged, warped or no longer closes properly, weather sealing alone may not fully solve the problem.

Start by checking around the edges of your window frame and seals. Move your hand slowly around the frame to feel for any cold air coming through, paying close attention to the bottom of the window, the sides of the frame and anywhere the window closes against it. If you're not sure where the gap is, try checking on a colder or windier day when draughts are easier to detect.

Once you've identified the areas that need sealing, measure each section of the window frame before cutting your seal. Cut one piece at a time rather than estimating the full length, as this will help create a neater finish and minimise gaps at the corners. Use scissors or a utility knife to make clean, straight cuts. If using a utility knife, cut on a stable surface and keep your hands clear of the blade path.

Before applying any seal, wipe down the frame with a cleaning cloth and warm water mixed with a small amount of mild detergent or dishwashing liquid. This removes dust, grease and grime so the adhesive can stick properly.

Once clean, wipe away any residue and allow the surface to dry completely. If the frame is damp or dusty, the seal may not stay in place.

When you're ready, peel back a small section of the backing and press the seal firmly into place along the window frame. Work slowly, peeling and pressing as you go rather than removing all the backing at once. This makes it easier to keep the seal straight and avoid stretching it.

Once applied, run your fingers along the full length to ensure it is firmly attached, especially around corners and joins.

Gently close the window so the seal compresses. The window should still close smoothly while creating a snug seal.

If you need to force the window shut, the seal may be too thick or positioned incorrectly. Adjust it if needed before continuing.

Once the seal is in place, run your hand around the window again to check for any remaining cold air.

If you still feel a draught, check nearby doors, vents and gaps under skirting boards as well. Door snakes, door weather seals, adhesive door seals and gap fillers can help reduce draughts in other parts of the home. Often, it's a combination of small gaps rather than one large opening that's making a room feel cold.