Windows 8% of building envelope but a...
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Andrea Blackmore
Windows 8% of building envelope but account for 40% of heat loss!

This article shows how much thermally unbroken aluminium window frames contribute to heat loss from homes.

The author says “Aluminium frames without thermal breaks are highly conductive. The … aluminium frame only represents 1.6% of the buildings total envelope but is responsible for over 15% of all energy lost in a building.”

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