Replace window seals appropriately

When replacing the window seals, the most important thing is to find the same profile shape. Among the more than 4000 common seal types there are many clearly assignable profile shapes. Searching for very old windows or unknown manufacturers can be difficult.

Stamp the profile cross-section

The profiles of the window seals also depend on the material of the window frame. The types can be roughly divided into plastic, wooden, aluminum and roof windows. The shapes of the rebate and center seals also depend on the number of hollow chambers, which can be different for all frame materials except wood. Changing a profile of the window seal is only rarely advantageous or possible and should only be carried out by a specialist.

  • Also read - cleaning window seals
  • Also read - Attach window seal with adhesive backing
  • Also read - Replacing window seals in parts

The cross-sections of the profiles, often in the millimeter range, determine whether the window is tightly closed. A common way of finding the correct window seal profiles is to make a stamp of the previous seal. To do this, a short individual piece is cut out of the profiles that are to be exchanged. The cross-section side is pressed onto an ink pad and stamped on a sheet of paper. This profile can now be searched for as a shopping aid on site or by scan or fax. A sample fulfills the same purpose in personal research in a specialist retailer.

With this procedure it is also possible to replace only individual defective sections of the window seals. The repair pieces used must be glued to the existing window seals at the ends.

Find and install suitable window seals

  • Sample or
  • Stamp imprint
  • Sealing tape adhesive
  • Tape measure or folding rule
  • Knife or cutter
  • Miter pliers

1. Document the sealing profile

In order to find and buy the right profile for your window seal with absolute certainty, you have to get hold of the appropriate profile. In addition, the removal of the window is unavoidable with almost all window seals.

2. Expose the sealing profile

After removing the window sash, as you have to do when replacing the window seals, the profiles are exposed. Now you can pull out a loose end and ink the profile with an ink pad and make an impression.

3. Cut out the profile

If the end of your window seal doesn't make a clean cut edge, you'll need to cut out a well-preserved piece of the sealing tape. This one to two centimeter long piece can serve as a pattern or stamp template.

4th. Measure the length

Depending on the condition of your window seals, repairs with individual pieces may be sufficient. The usual is the complete replacement of the window seals. Measure the length of the band and calculate a five percent tolerance. Assign the required length unequivocally to the corresponding profile form so as not to exchange medium and folding seal.

5. Assembly of the new seal

Attach the partial or complete pieces to glue portions to the tape legs.

Tips & Tricks If you are not satisfied with the previous sealing power of your window, changing the contact pressure can help. For this you need other sealing profiles that should be adapted by a specialist.