Thermal Star Windows

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Windows & Wind Loads


Earlier this month, much of Southeastern Australia experienced an onslaught of powerful winds that brought to light an essential concern – the safety of windows and doors.

The force of wind loads on buildings can be formidable and will often rank as one of the most significant forces a structure faces.

Your windows and doors have to withstand these forces for your safety and that of your loved ones.


Understanding Wind Loads

Wind loads are calculated based on two primary factors: wind speed and wind pressure. Wind speed measures the velocity at which air moves past stationary objects, while wind pressure quantifies the force per unit area exerted on a structure by moving air.

Though they sound similar, wind pressure more relates to the interaction between air velocity and different aerodynamic shapes. For example, different parts of the same building will experience different wind pressures while receiving the same wind speed. 


Evaluating Window Strength

Adherence to safety standards isn’t optional.

Every construction site should undergo a comprehensive assessment based on AS/NZS 1170.2 for Wind Action or AS4055 Wind Loads for Housing. To meet these standards, windows and glazed doors must undergo rigorous testing to assess their performance and durability.

Determining The Correct Wind Load for Your Windows

Calculating the wind loads for your home is a complex and precise process best left to qualified professionals. Typically, architects, engineers, or builders undertake this during the design phase to ensure that all relevant forces are considered when determining the strength of various elements, including windows and doors.

These professionals consider several factors, including:

  1. Structural Shape and Properties of Your Home: The shape and materials of your home play a crucial role in how it interacts with the wind. Irregular shapes or designs with large surface areas may experience higher wind loads.
  2. Operating Force Tests: These tests assess how well windows and doors can withstand the forces exerted during extreme wind conditions, such as gusts and sudden pressure changes.
  3. Air Infiltration Tests: Ensuring that windows and doors remain sealed against air infiltration is vital for energy efficiency and protection against wind-driven rain.
  4. Water Penetration Tests: Windows and doors must be tested to resist water penetration under heavy wind and rain conditions to prevent water damage to your home's interior.
  5. Ultimate Window Strength Tests: These tests evaluate the maximum force windows can endure without failure, providing a crucial measure of their durability during extreme weather events.


Ensuring The Durability Of Your Windows

To ensure your windows can withstand high-speed winds, follow these steps:

  1. Consult with your architect, engineer, or builder: They will consider your home's unique characteristics and recommend windows and doors that meet or exceed local wind load requirements.
  2. Talk to our team: Our experts can help you choose the right window and door solutions tailored to your specific needs. Options such as Southern Star Aluminium or Canterbury Timber products offer excellent durability and aesthetic appeal.


By adhering to industry standards, engaging qualified professionals, and choosing the right window and door solutions, you can safeguard your home in the face of powerful winds.

Get in touch with our team of experts here.

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