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Even if their role seems minor at first sight, window joints are very important and contribute greatly to your thermal and acoustic comfort in everyday life. Whether foam, PVC or silicone, they are very easy to install and limit heat loss responsible for energy waste.

Seals of a window: what are they for?

Window seals are essential to guarantee watertightness and air tightness of joinery. Without them, your windows would be totally permeable. Window joints are also very actively involved in the thermal and acoustic insulation of your home. It is therefore important to take care to put them well and check if they are in good condition very regularly. Indeed, window joints wear out over time. They harden, dry and crack. An effective seal is a seal that compresses when closing the window. If this is not the case, then it is time to proceed to his replacement.

The different types of window seals

It exists different types of joints which guarantee the watertightness of your windows and which contribute to the thermal comfort of your home. You have in the first place the internal joints that are an integral part of the window and the seals to be installed at the joinery and the wall when installing your windows. There are also joints, called caulking, to improve the performance of your windows and strengthen the thermal insulation of your home.
For prevent the cold from entering your interior, you can caulk your windows with foam joints, plastic, PVC or metal. The silicone seal is also very widely used because it fits perfectly the frame of your windows. Most joints come in white, black, gray or brown to marry as much as possible with the frame of the window and be as discreet as possible.

How to install a window seal?

Most joints are very easy to set up and pose without being an experienced handyman. For foam, plastic or PVC joints, simply clean the frame and stick the joint directly. However, their effectiveness is not optimal and it is recommended to change them at least once a year. Metal seals require the intervention of a professional to pose them but they are the most effective. The silicone seal is applied using a gun and a release film. Once installed, simply close the window and let dry 24 hours. Then remove the plastic film and your seal will be perfectly adapted to the shape of your opening.


Video Instruction: Repairing home windows. Part 3 marking out the casement joints