High wind zone certificates

Buildings located in a high wind zone need to meet the New Zealand window testing standard, also known as the specification for performance, NZS 4211: 2008. The building's permit should state its wind zone.

At Neuffer we have supplied windows and doors to numerous projects across New Zealand. We know the market and stay up to date with current regulations. This is why our bestselling aluclad timber windows and French doors, Eco Plano and Idealu, are certified to comply with the NZS 4211: 2008 standard, including 2022 NZS 4211 updates.

Further timber and aluclad timber windows and doors are currently undergoing testing with high wind certificates available soon.

To effectively balance pressure between inside and out during high winds and storms, just the right amount of air leakage or air infiltration needs to occur through windows and doors. A smoke test is therefore carried out and values according to NZS 4211: 2008, clause 8 are provided.

Furthermore, during storms much rain is blown onto windows at high pressure due to strong winds. Water test pressures and wind pressure limitations are therefore measured by determining the maximum pressure or wind speed where water still drains effectively from the door or window, according to NZS 4211: 2008, clause 9.

To further ensure that all parts of windows and doors will perform under high pressure, a maximum operating force test is carried out, focused on fittings.

In terms of deflection and ultimate strength, according to NZS 4211 clause 6 and NZS 4211 clause 10, window measurements are then carried out via rapid cycles of positive and negative pressure to determine impact resistance and safety.