Our windows and doors comply with the New Zealand building code

All products supplied by Altherm Window Systems meet or exceed the requirements of the New Zealand Building Code and New Zealand Standards; NZS4211, Performance of Windows, and NZS4223, Glazing in Buildings - Parts 1-4 incl.

This means our windows and doors have been designed and successfully tested to perform in New Zealand’s most diverse conditions, and will:

  • satisfy the strength and deflection requirements of the standards
  • deliver the desired levels of weathertightness appropriate to the prescribed wind zones
  • meet the air leakage requirements necessary to provide comfort and efficiency
  • include glazing of appropriate weight, strength and safety to satisfy not only the expected wind load but also accidental human impact.

In accordance with the TERMS AND CONDITIONS OF WARRANTY, a warranty for all Altherm Window Systems products is provided, under normal conditions of use, against failure of materials and/or workmanship for a period of 5 years from the date of practical completion.

The surface finishing of the aluminium extrusion is covered by a separate Performance Warranty which is dependent on the actual finish selected.

A window and door hardware/component warranty protects against defects in manufacturing, functionality and surface finish for a period of 5 years, provided care and maintenance guidelines have been followed. Plated (soft) finishes are excluded from the warranty.

Please note: This warranty is subject to correct installation as outlined in the Building Code Acceptable Solution Clause E2/AS1 External Moisture or an approved alternative solution.