How to repair a window seal

Taking the time to keep your window seals in good condition can help to protect the structural integrity of your home. This is because it can stop moisture from entering which can cause damp.

Window seals provide a barrier between the inside and out of a building and are typically made of materials like rubber or silicone.

We’ve created a guide to help you fix your window seals. Although it’s worth noting that if your seals are beyond the point of repair, you will need to add new seals.

How to repair a window seal

The specific steps for repairing a window seal will depend on the type of seal and the extent of the damage, but these are the general steps to follow:

1. Remove any damaged seal material: If the seal is damaged or has deteriorated, you’ll need to remove it. Using a putty knife, scraper, or other tool, carefully remove any loose or damaged sealant
2. Clean the area: Use a clean, dry cloth to remove any dirt, dust, or debris from the area where the seal will be repaired
3. Apply new seal material: Depending on the type of seal, you may need to apply adhesive, silicone caulk, or other sealant material to the area. Be sure to follow the manufacturer’s instructions for the specific product you’re using
4. Smooth the seal: Using a finger, putty knife, or other tool, smooth the seal material into place, making sure it sits properly
5. Let the seal dry or cure: Depending on the product you used, you may need to allow the seal to dry or cure before

It’s really important to make sure you follow the manufacturer’s instructions to make sure you’re sealing your windows properly. If you’re at all unsure or think your windows are too damaged, then we would highly recommend contacting a professional.

How to reseal double glazed windows

If you’re wondering how to replace seals on uPVC windows and how to replace the rubber seal in double glazed windows, follow these steps:

1. Inspect the existing seals: Check the existing seals for any signs of damage, such as cracks or gaps. If the seal is damaged, it will need to be removed before applying new sealant
2. Remove the old sealant: Use a scraper or putty knife to remove any old or damaged sealant material around the window. Be careful not to damage the glass or frame
3. Clean the area: Use a clean, dry cloth to remove any debris or dust from the area
4. Apply new sealant material: Apply a new layer of sealant material to the area where the old material was removed. Use a high-quality, waterproof sealant material designed for use on double glazed windows. Be sure to follow the manufacturer’s instructions for the specific product you’re using
5. Smooth the seal: Use a putty knife or your fingers to smooth out the sealant material, ensuring that it is evenly distributed and adheres to the window and frame
6. Let the seal dry: The drying time will vary based on the type of sealant material you use. Check the manufacturer’s instructions for the specific drying time for your product
7. Check for leaks: Once the sealant material is dry, check for any remaining gaps or leaks. Use a torch to look for any light coming in through the window. If you still detect gaps or leaks, apply additional sealant material and allow it to dry

We highly recommend contacting a professional to reseal your double glazed windows in case you make the situation worse.

How to fix condensation between window panes

Condensation between window panes can happen when the seal that holds the panes together is broken or compromised, allowing moisture to enter and become trapped between the panes.

If your window is under warranty, it’s worth contacting the manufacturer to see if you can get the repair covered. If it’s not, we recommend contacting a professional to replace the window pane.

If you’re wondering how to fix moisture between window panes yourself, then we’d advise you against it as it could be a very costly repair if it’s not done properly.

How to fix cracked window putty

1. Remove the old putty: Using a putty knife, carefully remove the old, cracked putty from around the window pane
2. Clean the area: Using a clean, dry cloth, remove any debris or dust from the area where the old putty was removed
3. Apply new putty: Take a small amount of new putty and work it with your hands until it becomes soft and pliable. Roll the putty into a long rope shape and press it into the gap between the window pane and the frame. Continue working with the putty until it completely fills the gap and creates a smooth, even surface
4. Smooth the putty: Use a putty knife or your fingers to smooth out the putty, ensuring that it is evenly distributed and adheres to the frame
5. Let the putty dry: The drying time will vary based on the type of putty you use. Check the manufacturer’s instructions for the specific drying time for your product
6. Sand the putty: Once the putty is dry, use fine-grit sandpaper to smooth out the surface of the putty
7. Prime and paint the putty: Apply a coat of primer to the repaired area and allow it to dry. Then, apply a coat of paint that matches the colour of the rest of the window frame

How much does it cost to reseal windows?

The cost of resealing windows can vary widely depending on a few factors, such as the size of the windows, the number of windows that need to be resealed, and the type of windows you have.

It’s important to remember that resealing your windows can help you save money on energy bills in the long run by reducing draughts and preventing heat loss. It can also help to prolong the lifespan of your windows, preventing the need for more costly repairs down the road.

Window seal replacement cost guide

FAQs

Can the seal on a window be repaired?

It can be so long as the damage isn’t too bad. We recommend hiring a professional to take a look.

Who can fix the seal around a window?

You could hire a window fitter or handyperson to fix your window seals.