Australia has many homes built on beams or supports known as joists which form a sub floor for the main construction. The strength of this sub-floor acts as a foundation for the building. But the very nature of the sub floor is such that it is susceptible to attacks by moisture, termites and the likes. In addition to this if the sub floor is inadequately ventilated, your problems increase manifold.
Usually smart home owners prefer to hire termite inspection Brisbane before buying a property. But home owners who do not do this could be faced with many hazards including those relating to health and rodents and unsightly moulds in the house, to name a few.
Lack of proper ventilation in sub-floors may be because of a number of factors.
There is soil around the house and the crawl space that the sub floor provides is very conducive to the moisture in the soil being absorbed by the beams constituting the sub floor.
Many times, rainwater is collected with the use of gutters and sent down to rainwater tanks using piping. If these gutters are not routinely and properly cleaned, the rainwater can get accumulated around the house creating a moisture rich area surrounding the house, which is not good for your sub floor.
The minimum recommended headroom is 300 mm under the beams and 400 mm under floor joists. This makes for larger ground clearance enabling more air circulation and better maintenance with easier repair. In cases where this crawl space is lower than the recommendations, it can be of detriment to the homeowners.