Do you have problems with condensation? This slideshare will help you understand why condensation might occur.

1. Why Do I Have
Condensation On My
Windows?

2. Do You Have Double Glazing But
Still Get Condensation?
• This is a common question we are asked so we have put
together a presentation to help you!
• Condensation can occur on the inside and the outside of
windows.
• Both of which are due to different reasons.

3. What are these reasons then?
• Poor ventilation
• Poor thermal insulation
• Inadequate heating within the room
• High moisture in the air

4. What Is Condensation?
• Condensation is the point at which water vapour turns
into liquid. It happens when the temperature of a
particular product falls below the temperature of the
surrounding air.
• Water vapour from the atmosphere will condense into
water droplets on the surface of the products.
• Continue to next slide!

5. What Is Condensation?
• In humid conditions the condensation will appear at
higher temperatures.
• The difference in temperature between the internal &
external environment, as well as the glass will cause
condensation to form.

6. Condensation Can Cause Damage
To Your Home
It can cause:
• Musty odours.
• Water formation on window sills.
• Damaged paintwork, wallpaper or curtains.
• Mould.

7. Interior vs Exterior
Condensation
• Interior condensation can be caused by poor insulation
or single glazed windows.
• With particular types of glass such as Pilkington (which
we use), it can sometimes cause the opposite to happen
and condensation will appear on the exterior.
www.pilkington.com
• This is often quite normal & the condensation will clear
within a few hours.

8. How Does Double Glazing Help To
Combat Condensation?
• Double glazing can dramatically reduce the amount of
condensation that is produced on your windows.
• It is an insulator and is designed to reduce the amount of
heat lost through your windows.

9. What If There’s Still Condensation
On My Double Glazed Windows?
• There are two main reasons why you may still have
condensation on your double glazing.
• Not enough heat within a room
• Or poor manufacture and/or installation of product.
- If the sealed unit on your double glazing fails it will
cause condensation to form within the cavity. You can
test this by wiping the glass; if the moisture cannot be
removed then the unit has failed.

10. How Does Zenith’s Double Glazing
Reduce Condensation?
• All of our products are A-rated as standard as well as
being installed using our innovative EcoTherm A-rated
installation.
• This means that they will dramatically reduce the
amount of valuable heat energy being lost through your
older, more inefficient windows.
• They will reduce the amount of condensation on your
windows with improved ventilation

11. Want to find out more?
• If you have any questions or would like further information,
please visit us at: http://www.zenithhome.co.uk/
• Or telephone us on: 0800 1143061
Information and diagram obtained from GGF article on condensation. Reference
50.1, May 2013 - www.ggf.org.uk