DIY Window Insulation

DIY window insulation acts like double glazing but is much more affordable than permanent glazing. It may be a good solution if permanent double glazing is not an option.

What is DIY window insulation?

DIY window insulation consists of a thin, clear plastic film taped to the inside of your window frame but not on the glass itself. It prevents condensation and reduces heat loss by acting as double glazing. The film is easy to install and the only thing needed is a pair of scissors and a hair dryer to shrink it so it looks tidy.  

For which frames is it suitable?

DIY window insulation can be used on wooden and aluminium frames. It is not recommended for use on plaster, drywall/wallboard, unfinished/unvarnished wood or frames with a flaking paint surface. It is most effective when the window frame is 10-20 mm thick. When installed on wooden frames in the middle of winter, condensation from the wet wooden frames may form between the plastic and the glass pane. This will not affect the effectiveness but may be unsightly and we recommend it is installed before winter.

What does a DIY window insulation kit consist of?

A thin layer of clear plastic film, double sided tape, alcohol wipes to prepare the frame surface plus illustrated instructions on how to install the window insulation. CEA recommends you buy extra tape.

How long does it last for and how do I remove it?

The DIY window insulation kit is meant to last for one heating season but anecdotal evidence has shown it can remain intact for several years. It is best removed with adhesive remover to avoid any damage to the paint on the window frame or the frame itself.

Can I clean my window after installation?

As long as the insulation is up you will not be able to clean the inside of the pane so make sure that is cleaned before you put the insulation up and make sure the room is clean and dust-free when you are installing it. CEA has trialed cleaning the plastic with a soft cloth and window cleaner and there have not been any adverse effects after 4 weeks.

What size does the window insulation come in?

The DIY window insulation comes in a kit of app. 4.5m² (1.50m x 3.00m) of window film, 18m double-sided tape and detailed instructions. You simply cut the film to the size of your windows.

Caution

DIY window insulation can be a good solution to avoid condensation and heat loss through windows. However, caution is advised in the following instances:

• DIY window insulation may not be suitable in households where little children, pets, etc. may easily damage the film.
• Installation on wooden frames in the middle of winter when frames are damp may result in condensation being trapped between the film and the pane. This will not affect the effectiveness of the insulation but may be unsightly.
• The distortion of light through the film is generally minimal but where high-quality views are treasured it may distract from the viewing pleasure.
• If the pane is cracked, the frame is poorly joined or otherwise air tightness is not achieved when applying the film, DIY window insulation will not be able to insulate properly.
• When applied to frames with flaking paint or otherwise poorly painted surfaces, it may damage the frame on removal.
• The tape of the DIY window insulation may leave a light stain when left on for longer periods than one heating season.
• On frames less than 5mm deep there may not be enough air trapped in between the glass pane and the window film for the DIY window insulation to insulate the window effectively.