Innovation and quality: Altherm’s aluminium joinery, window glass, double glazing and sliding doors are guaranteed to last. Since 1972 we’ve been manufacturing doors and windows – New Zealand homeowners rely on our longstanding reputation. Altherm aluminium joinery for doors and windows: the choice of architects for over 30 years.
Revolutionise your doors and windows! New Zealand owned and operated Altherm offers aluminium joinery and window glass that can make a world of difference to your home. All our aluminium joinery, doors and windows, come with a five-year warranty – and all double glazing has a ten-year guarantee. Althem makes the highest-quality doors and windows New Zealand has to offer – all doors and windows New Zealand designed and manufactured. With 2500+ satisfied customers, our service for aluminium joinery is second-to-none.
Sliding doors: Altherm can transform your home with bi-fold, hinged, French or sliding doors. Our popular sliding doors bring the outside in; check out our range of sliding doors. A wide selection of styles and colours for sliding doors. We also ensure your sliding doors are compliant with council by-laws if your sliding doors lead to a pool or balcony.
Double glazing – for a warmer, quieter home. Cool in summer, warm in winter, double glazing reduces heating and cooling costs – making double glazing cost-effective. Double glazing makes your home dry and quiet and our double glazing comes with a ten-year guarantee. Your best choice for double glazing on doors and windows; New Zealand designed and manufactured.
For aluminium doors and windows, New Zealand homeowners trust Altherm.