Knowing your area’s wind classification is crucial for every building project as it can influence your structure’s durability, construction cost, bracings, tie-down fixings & design, framing & trusses, cladding and windows. Wind Classification requirements are outlined in the Australian Standards (AS 4055-2012) to ensure the best outcome for engineers and builders.

Typically, a soil report will remain valid unless there is a change to the site’s conditions, these changes could include:

• New trees, either on your property or adjacent properties
• If the property is in an area prone to erosion or landslides
• Excavation of soil from your property, and/or fill being put onto your property (such as landscaping changes)
• If the area that you want to build your new structure on wasn’t previously tested in the report

It should also be noted that old soil tests may not be in accordance with current standards or current soil testing procedures, which means it may not be as accurate as necessary.

Any structure that requires a building permit will need a soil test. E.g. sheds larger than 10m², this is because these structures will require building permits that need the relevant engineering documents in order for the permit to be approved, one of these documents is a valid soil test.