• ensure there is good ventilation under suspended timber floors – clear openings of 3500 mm2 per square metre of floor area must be provided
• cover the ground with a vapour barrier such as polyethylene sheet where there is high ground water content under the building or where sufficient underfloor ventilation cannot be provided. (Even with a vapour barrier, minimum subfloor ventilation openings of 700 mm2 per square metre of floor area must still be provided.)