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)

Eaves Vent EV25

The NZBC requires a barrier between the roof paper & ceiling insulation.

NZS 4246:2006 – New Zealand Energy Efficiency – Installing Insulation in Residential Buildings. Page 22, Point 3.12.2 states the following:

“A minimum gap of 25mm needs to be maintained between the insulation and the underside of the roof (or underlay) to prevent wicking of water into the insulation“

The EV25 Eaves Ventilator performs two functions:

  • It creates a moisture barrier between the roof underlay and the insulation. This prevents any contact with moisture & condensation.
  • It ensures a continuous airflow from the soffit/fascia vents into the roof void. This area is commonly blocked by the roof insulation.

New Build – The Rafter Tray can be optionally fitted to the external face of the wall plate during construction which will make it easier to place at the correct height. This method only requires one fold.

Retro-fit – If the pitch of the roof is shallow, a telescopic grabber (used for picking up litter) can be used by pulling back the existing insulation and placing the tray on the wall plate. When the insulation is placed back it will hold the tray in place.

Dimensions – 845mm x 300mm

Material – Recycled Plastic

Airflow – 25,000mm2 lin/m

All products available through your preferred supplier:

Bunnings Warehouse
Steel & Tube
Metalcraft Roofing
Mitre 10 Mega
Carters - Your Building Partner
Calder Stewart
Placemakers - Know how can do
Roofing Industries