During the colder months, most of the precious heat inside your home will be lost through the windows. With Austrian manufactured INTERNORM triple-glazed windows however, it is quite the opposite. With an R-value* of 1.2-1.6 you can be sure that your INTERNORM windows will maintain warmth throughout the whole house.

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Triple-glazed joinery from INTERNORM is Europe’s number 1 insulated door and window brand trusted and highly regarded across the European continent.

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They are also leaders in thermally insulated triple-glazed window and door systems for those wanting certified ‘passive houses’.

INTERNORM offers an extensive range of both UPVC, UPVC/Aluminium and Timber/Aluminium windows. With U-values as low as 0.6 and respective R-values of 1.5.

With INTERNORM triple-glazed joinery there is NO condensation.

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*R-value is a measure of resistance to the flow of heat through a given thickness of a material (such as insulation) with higher numbers indicating the higher insulating properties.