Welcome to the Windows Clinic

Helping diagnose common problems with existing window installations

Do my windows need resealing?

cream uPVC casement window

Resealing double-glazed windows can be beneficial if you notice the following:

  • Condensation on an internal pane of glass
  • Draughts from the window
  • Noticeable wear, tear or gaps around the seal

There are many factors that contribute to a damaged window seal. Something as simple as temperature can slowly affect the seal, as windows naturally expand and contract to adapt to this change. Eventually, this can have a damaging effect, as can using strong or abrasive cleaning products on the window unit.

If you've noticed condensation on an internal pane of glass, the sealed unit may have sprung a leak. If it has, the damaged seal is allowing air to enter and inert gas within the unit to escape. This may not be very noticeable to start with, so make sure you check carefully. It will become progressively worse as moisture begins to build up inside.

Can you reseal windows?

Resealing windows is possible, especially where there are gaps between the window and the siding. But because windows that are improperly sealed can cause further disruption to your home by letting heat escape and compromising your window's efficiency, it's recommended you consult a professional rather than try to seal the window yourself.

If resealing a window doesn't solve the issue, or if your windows are very old and worn, you may benefit from replacing the entire window with new double glazing instead.

Draughty windows can also be cured by replacing or resealing a window. Find out more about how to cure a draughty window here.

If you still have any additional questions or would like more information, speak to a member of our team today.