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There are no grooves or ‘v’ lines running along Altherm profiles, and we’ve paid close attention to shapes and proportions across all our ranges.

Awning

AWNING & CASEMENT

Altherm awning windows are New Zealand’s most popular window format. 

Sliding 

SLIDING

Altherm horizontal sliding windows don’t project onto walkways and decks.

Bi fold

BI-FOLD

Altherm bi-folds provide a dramatic opening to suit your outdoor lifestyle. 

Custom

CUSTOM DESIGNED

Windows of all shapes, sizes and configurations are possible.

Roof

ROOF WINDOWS

These are the ideal choice for an overhead window that provides flexibility and thermal efficiency.