Single-glazed Window
vs
Window Film
vs
Window Coating (External)
Window Insulation Comparison
Graph of Temperatures Recorded Under
3 Different Window Insulations
set ‘Single-glazed Window’ as baseline/existing window
Graph of Temperatures Difference Between
3 Different Window Insulations
set ‘Single-glazed Window’ as baseline/existing window
Legend
Orange – Single-glazed Window
Grey – Window Film (applied to single-glazed window internally)
Green – Window Coating (applied to single-glazed window externally)
During Daytime
Temperature record orders: Single-glazed Window > Window Film > Window Coating (External)
For hot regions: window coating (external) and window film can significantly lower the room temperature than a single-glazed window on a hot day (ranging from -5°C to -15°C lower).
For cold regions: it might not be good news that both products do not gain much heat on a sunny day.
During Nighttime
Temperature record orders: Window Film > Single-glazed Window ≥ Window Coating (External)
For hot regions: window coating (external) loses heat faster than a single-glazed window, which could be both good and bad news depending on the situation; whereas window film can retain more heat in a longer period than the other two (up to 5°C higher).
For cold regions: window film is the only winner in this comparison.
Other Factors
Buildability – window coating (external) could be very difficult to apply in most cases; whereas window film is feasible for nearly all cases.
Cost-wise – both products are much similar in terms of price charged.
Durability – window film claims to last for 10 – 20 years whereas window coating claims to last for 20 – 30 years.
Product availability – window film is available in Australia whereas window coating is not currently available in Australia.
See-through performance: window film is much better than window coating if look closely.