weatherstripping casement windows

Weatherstripping casement windows (and awning and hopper windows) is a good energy-saving idea and a typically easy task. Basically, you just have to apply proper weatherstripping around their stops, in order to create a tight seal when the edges press against them.

For a good sealing, the adhesive should be placed on the interior frame, where the sash makes contact.

Casement, Hopper and Awning windows are three variations of the same basic window design. They only differ on the location of their hinges. That makes the weatherstripping of any of these types of windows similar in their materials and methods.

Weatherstripping materials for casement windows

Adhesive backed tape - made from foam or sponge rubber, and available with various widths and thicknesses - is the commonest solution to weatherstrip the stops of casement windows.

This material is self-adhesive, and it's easy to install and inexpensive.

The problem with it is that it wears quickly, and you will have to install it every two years or so (the exact lifespan depends on use...).

Reinforced felt is also a possibility, as well as special gaskets (in the form of tubular vinyl, silicone or sponge-rubber tubes). These special gaskets will last longer - at least 5 years - while tapes and felts may last just 1 or 2 years.

Cleaning the stops of the window

Before applying any self-adhesive material, clean carefully the surface where the weatherstrip is going to be applied.

In many cases you may use simple detergent and water.

Residues of old paint may require cleaning with proper solvents, and a more demanding initial job. If there is residues of previous adhesive weatherstripping, use petroleum jelly to remove it.

Do not apply the weatherstripping material over dirty (oily, dusty, greasy, damp..) or undried surfaces.

Temperatures

Materials like adhesive foams require at least 50º-60ºF temperatures to get a good bond. Select a sufficiently warm day to apply the weatherstripping.

Applying adhesive backed tape

Use the adhesive tape on the four sides of the casement window stops.

Apply carefully the adhesive along the stops of the window while removing its backing. Follow the manufacturer's instructions.

To make a tight bond (after laying the weatherstripping) apply pressure all over the adhesive. You may use your finger...

Applying Windows Weatherstripping felt

Use the felt on all four sides of the window stops. The application is very similar to that of adhesive tape. Just cut to length and staple or tack the material into place.

Applying Weatherstripping gaskets (Tubes of sponge rubber, vinyl and Silicone)

Use the gaskets on all four sides of the casement window stops. Weatherstrip Gasket Silicone

Weatherstripping gaskets allow a tight seal and longer durability than adhesive felts and tapes (gaskets are also a more expensive material).

The gasket tubes come with a flange that should be stapled over the stops of the window. Pay attention to the package instructions.