Sobre Granny Flats Gold Coast
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Gold Coast Granny Flat Subfloor Ventilation Requirements
Ensuring adequate subfloor ventilation in a Gold Coast granny flat is critical to prevent moisture entrapment, timber decay and termite infestation, particularly in humid suburbs like Labrador and Robina. For a timber-stumped floor, provide a net free vent area of at least 600 mm² per linear metre of subfloor boundary when the clearance between bearers and ground is over 600 mm; if the clearance is under 600 mm, increase to 3,000 mm² per metre. Install corrosion-resistant metal mesh vents—positioned no less than 300 mm above ground—to allow continuous cross-flow, reducing subfloor humidity and mould growth. In termite-prone coastal regions, incorporate physical termite barriers—stainless steel mesh—in every vent opening and seal all gaps around pipes and wiring, per AS 3660.1 requirements. If environmental constraints prevent regular venting, consider a mechanical subfloor extraction fan with humidity sensors that automatically expels damp air, meeting AS/NZS 3666.1. Ensure a minimum 150 mm separation between soil and the underside of floor joists to discourage moisture retention. Meeting these ventilation requirements protects your Gold Coast granny flat from hidden moisture-related damage and ensures long-term structural integrity.
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