Do you have double glazing in your home? How can you tell if it’s time to replace your old, inefficient windows? We explain this with advice from our double glazing experts.
There are four main things to look out for:
- Water leaks
- Condensation between the glass panes
- Cracks, chips or holes
- Draughts
Water Leaks
I have a water leak in the frame
This could be due to the failure of the window’s weather seals. Contact your window supplier to see if replacement seals are available. If the seal is not the issue, the drainage section may be blocked. Try cleaning any build up of debris in the window frame first. You can follow our window cleaning guide first to see if this helps.
Water is coming in from the edge of the frame
The sealant between the window and aperture might have failed. This failure could cause gaps around the frame. You need to repair or replace this quickly.
If the windows are still under guarantee, contact the company who installed them. If not, hire a double glazing professional to fix the problem and prevent water damage.
If you have a water leak and your double-glazed windows are very old, then it might be time to upgrade them.
Condensation
Condensation is when a gas or vapour turns into a liquid. It occurs when the temperature of an object falls below the “dew point” for a given level of humidity in the air.
I have condensation on the inside of my windows
Consider factors such as ventilation and room use. Also, consider indoor and outdoor temperature and the number of people in your home.
Improve ventilation and consider using a dehumidifier to reduce condensation.
You may not need a replacement or repairs for your windows. But, it is advisable to review the energy performance. Upgrading to energy-efficient windows can help by keeping the internal glass warmer.
I have condensation on the outside of my windows
This means your windows are keeping heat in your home. It will disappear as the outside temperature rises.
Condensation forms on the outside of the glass when it’s colder than the air. The air outside needs to be more humid than the glass. Condensation forms on well-insulated glass at night and in the early morning. This happens in clear weather with no wind.
This phenomenon does not represent a problem. Instead, it proves good thermal insulation.
I have condensation between the window glazing
This is a big issue. It means the seal between the glass panes has a leak, and the gas cavity is no longer sealed. You must replace the sealed unit. Your double glazing has failed. The performance of your window will decrease. Check if your guarantee covers this.
My window frame is damaged
Cosmetic damage can be managed. But deep cracks, chips, or holes can decrease window efficiency and let in draughts. It may be necessary to replace the windows, so it’s best to contact the company that installed them.
Draughts
There is a draught between the brick and window frame
Over time, the seal breaks down around the window. You may feel draughts between the bricks and window frame. So the window sealant may have failed. To fix this, fill the space between the wall and the frame. If you don’t want to do it yourself, hire a professional.
There is a draught between the window frame and glass
The weather seal inside may have worn away over time. It may have lost its elasticity, allowing in draughts. Like with water leaking through this area, you’ll need to replace the weather seals. But as they aren’t working properly, it is worth considering upgrading your windows. They may be less efficient than the current standard.