Altherm draws on a 40 year tradition of design and engineering excellence, so whatever the project, there's an Altherm product that's perfect — new build or renovation. Altherm offers a wide range of solutions for all homes, from entrance doors to windows, sliders, bi-folds and thermally efficient options, Altherm has an option to suit every need.

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