To improve energy efficiency by reducing heat loss through existing single-glazed windows in a building.
Window Insulation
By Jianpeng Deng
Updated on 21/10/2021
Define Optimum Temperature Inside Buildings
A well-insulated building should be one with small temperature fluctuations throughout the day.
In simple English, room temperature stays about the same no matter how hot or cold it gets outside the building.
Hot Regions
Example: Brisbane.
A well-insulated window should reduce heat gain to a building during daytime and prevent heat from losing too quickly during nighttime.
Cold Regions
Example: Hobart.
A well-insulated window should gain heat as quickly as possible during daytime and then keep the heat inside a building as long as possible.
Options to improve existing
single-glazed windows
Double-glazed Window Replacement
Replacing existing single-glazed windows with double-glazed windows is the best option to keep the heat inside a building; however, it is also the most expensive option.
Ideal for cold regions.
Window Film/Coating Application
Adding a layer of window film/coating is the most economical option to control heat gain and heat loss inside a building throughout the day.
Suitable for all regions.
Double-Glazed Window
Window Coating
Window Film
Full Comparison
Between 5 Different Window Insulations
(Sketch by Dennis Yildirim)