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From aluminium to uPVC joinery we have a window and door solution for your home. We understand that not all projects are the same, homes differ in size, design, materials and location.

Altherms range of windows and doors have been designed to withstand the harsh New Zealand environment and meet all types of scenarios. What ever your plans; building or renovating, Design Windows can help! We draw on our extensive experience of over thirty years to advise you on the best window and door joinery options available for your home.

Browse through our residential projects from throughout the South Island including Nelson, Christchurch, West Coast, Central Otago and Dunedin to see what you can achieve with our expertise.