Homeowner checklist

Attic ventilation: ratios, vent paths and fan effects

Use these steps to plan, check and keep a record of your next actions.

• Confirm whether the roof assembly is intended to be vented.
• Ask which roof space each vent group serves.
• Request the local requirement, ceiling area and product net-free-area calculation.
• Have ceiling leaks, eave paths, exhaust ducts and moisture concerns checked.
• Keep the vent layout and any fan assessment with the completed work record.

Notes & questions to follow up