Roofing Products

There are many product options which will provide passive ventilation for new build and existing homes. As this is a relatively new concept to New Zealand, we have recommended the following range of product options as a simple and effective guideline.

The products have been selected to achieve the recommended airflow for roof pitches above 15° (10,000mm2 lin/m) and below 15° (25,000 mm2 lin/m).

Product Range

Eaves Vent - EV25

Circular Soffit Vents - G700

Over Fascia Vent 10mm - G1200N

Eaves Comb Filler - G1275

Over Fascia Vent 25mm - G2500N

Ridge Vent - RV10P

Vented Batten - VB20

Roll Panel Vent - G502

Ventilated Apron Batten – AB20


63 Hull Road
Mount Maunganui


Ph: 07 574 1116 (Head Office)

Ridge Vent – RV10P

The Ridge Ventilator is designed to release warm air from the roof void. If the air is not released, condensation will form inside the roof and lead to structural decay and damp and mould in the home. This is a leading contributor to the extremely high level of Asthma and Respiratory diseases in New Zealand.

In a balanced system, wind blowing over the ridge creates a negative pressure that draws the warm air out of the attic/roof space. Replacement air enters through the under eave or soffit vents, bathes the underside of the roof, and exits at the ridge cap through the ridge vent. Even with no wind, the natural convection action of rising warm air maintains a continuous airflow along the underside of the roof. It is a system that works year round with no moving parts or energy consumption.

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