NZ TS 4211:2022 certified
 

ThermaDura windows and doors have been independently tested to the latest New Zealand standard NZ TS 4211:2022.  Providing you with complete peace of mind, every ThermaDura product is locally manufactured and rigorously tested right here in New Zealand. Our windows and doors were among the largest ever tested in a New Zealand laboratory, with testing conducted in Auckland.

 

ThermaDura windows and doors are proudly certified for the Extra High Wind Zone — delivering outstanding performance and reliability even in the toughest New Zealand conditions.
 

Test criteria:

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- Wind pressure

- Air infiltration

- Serviceability Deflection

- Water penetration

- Ultimate strength (wind pressure)