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Trusted for over 40 years

Altherm windows and doors are well known and trusted by New Zealand home owners, designers and builders, with over 40 years of local innovation.

It's the reason Altherm doors and windows are found in more New Zealand homes than any other brand. Inspired by design, we offer a wide choice in solutions for projects of all specification - from residential to high performance thermal and large format. Find the Altherm product that works for your build.

Altherm is a brand of APL, the largest window solutions organisation in New Zealand.

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