Are Expandify homes certified for wind ratings above N2?
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Yes — Expandify homes are engineered and certified for N2 wind classification as standard, and can be upgraded to support higher wind ratings (e.g. N3) on request.
Wind Rating Options:
- Standard engineering meets N2 (33m/s), suitable for most inland and suburban areas
- N3 engineering upgrades are available upon request for high wind regions (e.g. coastal zones, open plains)
- All designs are structurally reviewed against AS 4055 Wind Load for Housing as part of your project
Wind rating upgrades apply to:
- Roof tie-downs and wall bracing
- Window and door pressure tolerances
- Subfloor and footing anchoring systems
What you need to know:
- Your site wind classification is assessed during the Preliminary Site Feasibility Check (Prelim) or Site Assessment stage
- Higher wind zone requirements may incur an engineering and materials surcharge
- This applies to both DIY Kits and Complete Packages