01

What roof ventilation is intended to do

Passive or wind-driven vents allow roof-space air to escape when conditions and intake airflow support movement.

  • Release accumulated hot air
  • Assist moisture movement
  • Work with intake airflow
02

What affects performance

Roof size, partitions, insulation, eave ventilation and vent placement all affect performance.

  • Roof-space volume
  • Low-level intake openings
  • Vent capacity and position
03

What it will not fix by itself

A vent will not repair leaks, replace insulation, correct bathroom exhausts discharging into the roof or guarantee room-temperature changes.

  • Active water entry
  • Missing insulation
  • Unmanaged internal moisture
04

Questions before installation

Ask what problem is being addressed, how many vents are proposed, where intake air comes from and how penetrations will be weatherproofed.

  • Define the goal
  • Assess the whole airflow path
  • Confirm flashing details

Apply this to your roof

Use the guide as a starting point—not a remote diagnosis.

Every roof still needs its material, access, age and condition assessed. Send your suburb and what you can see for a practical next step.