Sub Floor Ventilation Spacing

Ground moisture rising into or entering the subfloor space can create a damp environment which encourages timber rot fungus growth and the potential for termite activity.

Sub floor ventilation spacing.

A minimum of five air changes per hour should be provided and double that for wet subfloor spaces. Terracotta 230mm x 150mm 6 200vent in situ. Aleta 230mm x. A clear opening area of 3500 mm 2 100 x 35 mm should be provided for every square metre of floor area.

Have a look at the just for fun exercise for more details on these requirements. Many traditional properties are built with a suspended wooden floor which sits above a void air space between the perimeter walls and ground if this space is not ventilated the air in it becomes stagnant and humid and the moisture within it begins to condense on the brickwork and flooring. 3600 specifies that the minimum requirement for sub floor ventilation should be one 1 ventilator of 8 400 mm. Subfloor ventilation is cross ventilation of the subfloor space between the underside of the subfloor and the ground surface under a building.

Of the australian standards a s. The space under a suspended timber framed floor must be ventilated. If the ground or subfloor space is damp the first thing to do is identify the source of the moisture. Openings should be provided within 750 mm of.

Inspect the subfloor space to ensure that the water is not coming from leaking pipes wastes or drains. Squared nett ventilation per lineal metre on both external and internal walls. Vent type l vent size l area per square mm.