Sub Floor Ventilation Design

Terracotta 230mm x 150mm 6 200vent in situ.

Sub floor ventilation design.

The system consists of pumps fans and moisture resistant ducting. 2 requires the sub floor between a suspended floor and the ground to be ventilated. The sub floor area is often enclosed and poorly ventilated providing an environment that is conducive to fungi growth mould termite activity and wood decay. Sub floor ventilation is critical for the longevity of building materials for the health of the building s interior and the health of those occupying buildings.

The process is quite simple as sub floor ventilation systems operate in the same fashion as roof ventilation. Unfortunately sub floor ventilation is often a forgotten part of termite management. Squared nett ventilation per lineal metre on both external and internal walls vent type l vent size l area per square mm. Sub floor ventilation problems can be detected when looking at the status of the visual sub floor vents or the lack of them.

Insufficient ventilation can put your property at risk and can result in many issues including damp floors a musty smell mould and mildew growing on walls. This minimises sub floor moisture which helps to prevent timber decay and creates an environment that discourages termite attack. If additional passive vents are going to be installed that does not mean that this will fix sub floor ventilation problems but certainly more aeration to the sub floor region is a positive step. Fans assist in extracting damp stale air allowing dry fresh air to permeate your underfloor areas to keep them fresh.

Sub floor ventilation in buildings with a suspended floor that have an air space below the floor it is important that there is sufficient movement of air in this space.