Roof Space Ventilation Nz

Positive pressure ventilation systems these are very common in nz in existing homes but do not comply with current ventilation standards for new builds.

Roof space ventilation nz.

In skillion roofs the roof cladding and ceiling run parallel typically within 300 mm of each other. Ventilation natural ventilation of industrial and commercial buildings or of the above ceiling roof space in air conditioned buildings is a cost effective means of exhausting hot air or achieving a sufficient degree of air change in the building. Whilst it is possible to retrofit passive ventilation solutions to existing buildings it is highly recommended to incorporate passive ventilation during the design phase of any new building project. Ventilating a home with no roof cavity a flat roof or a skillion roof design is something that should be planned prior to building and should involve a ventilation specialist and the architect who both understand each others point of view and the needs of the client.

Nz commonly uses 4 5mm fibre cement for soffit linings with rebated timber fascia boards. The roof space is generally inaccessible with little natural ventilation and the small roof space can accelerate problems with moisture. Essentially the system works by taking air from the attic or roof space and pumping it into the main living areas though ducts or vents. Tevs aluminium vent strips are made in two standard widths with 3mm slots either 50mm or 25mm long x 3 00m although other special sizes can be made to order.

Roof ventilation achieving calculated continuous and unimpeded airflow through the roof cavity is relatively straight forward. Soffit venting is common to all roof space venting systems.