Please find following, answers to many frequently asked questions regarding Vent-A-Roof.

If you still have questions, please contact our helpful team on 1300 991 932 or click here to email us


Fresh outside air is taken in through soffit vents. This cooler air then rises from these intake points and mixes within the ceiling or building space and rises to the highest point of the roof. This mix of stale and fresh air escapes at the top of ridge through Vent-A-Roof Louvers. This continuous air flow is created by a naturally occurring thermal effect. A positive airflow also crosses over the ridge of the house creating a negative pressure which pulls air out from the ridge vent, this happens by also bringing in fresh air from the intake vents below.
Natural air circulation contributes towards prevention of mould build-up and mildew within the ceiling cavity, this maintaining a comfortable internal environment by removing hot air from the ceiling space.
In calm or windy weather, the entire ceiling is vented by a constant flow of cooler, dryer outside air. These key factors create and maintain effective and efficient air flow.
All current colorbond colours are available to match existing roof.
Vent-A-Roof louvers have been tested to 177 kph wind driven rain. The results are flawless. To make the test even more difficult to pass, we had Vent-A-Roof louvers with a 5 Degree pitch and made certain that we included a “joint” condition where two pieces of Vent-A-Roof came together. We hold testing results to prove our claim
We recommend a qualified experienced Roofer
Vent-A-Roof is currently designed for Metal Roofs only.
Vent-A-Roof utilising the natural flow of air – means, no moving parts, power, or noise
Yes you can partly install Vent-A-Roof however, to gain the full benefits of the ventilation system it is recommended to be installed to the entire ridge capping which also maintains a clean, attractive roofline
The new ridge capping is specially formulated to fit over Vent-A-Roof Louvre. New ridging would need to be installed.
Vent-A-Roof is slightly more expensive, attributes out-weigh costings, in contributing towards the decrease of energy consumption of electrical air-conditioning systems, fans and vents.
The ceiling space of a home can rise up to 70 degrees. Vent-A-Roof can reduce this temperature by 50% . There are also measures other than coolness, such as energy consumption, mould and mildew prevention.


Vent-A-Roof is a continuous ventilation system designed for most metal roofing profiles. Applications include ridge lines, hip lines, aprons, barge capping, insulated panel and metal wall cladding.
Vent-A-Roof is made of .4 Zinc Aluminium Sheet Steel
Currently we supply 18mm (corrugated), 30mm (5-Rib) and 44mm (concealed fixed)
Vent-A- Roof is available in 1500mm lengths only. Each box contains 10 louvers.
Yes, we print the instructions right on the box. They are also available on our website as a download. The option of watching an installation video is also available on our website.
Absolutely it will work. You are describing what is known as the “saw-toothing”, which means the panels are staggered (mostly a ridge condition) in order to keep the panels at the eave straight. There are several potential “causes” of this condition but will not address them here. The waterproofing foam in the Vent-A-Roof products is 12mm wide. If the saw tooting is worse than 6mm, we recommend “popping” a chalk line, to make the panels realign and use a power tool to make the correction. Keep in mind that to make a weather-tight seal, the panel needs to embed in the foam a minimum of 3mm. Vent-A-Roof does have a little “play” allowing you to push and pull the vent section to conform to slightly “out of square” ridge conditions. It is vitally important that Hip cuts are very straight, this will make intersections easier to negotiate.
No, you cannot use a standard roll top or 3-Break ridge. The ridge will need to be rolled to create an airgap of a minimum 25mm on the top of the ridge cap. Your preferred supplier/Roll former will be able to roll this for you. Our order form which is located on our website makes the ordering process very simple.
Please refer to the Vent-A-Roof formula to determine the dimensions of your ridge capping. We have made the ordering process very easy by referencing this formula, located on our website.
Yes, they can reference the formula on our website that will calculate the size of the ridge cap based on the information required.
No, the closed foam cell in the Vent-A-Roof louvre is weather tight. Vent-A-Roof has testing and engineering based on the sheets being straight WITHOUT turning up the sheets.
Vent-A-Roof louvers have been tested to 177 kph wind driven rain. The results were flawless. To make the test even more difficult to pass, we had Vent-A-Roof louvers with a 5 Degree pitch and made certain that we included a “louvre joint,” where two pieces of Vent-A-Roof louvre came together. We hold testing results to support our claim.
We recommend a qualified Roofer for install. The installation instructions are on the website and on the product boxes which we highly recommend to read before installing the Vent-A-Roof system.
As per our Technical Data Sheet, Screw Spacings – Each join must have screws installed at the ends of louvre, both, top and bottom using a 12x25 Metal Tek Screw. Corrugated Roof sheeting to be fixed every 4th Rib. 5-Rib roof sheeting to be fixed every 2nd Rib. Concealed Clip roof sheeting to be fixed every Rib.
A minimum 75mm Gap is required at the top of Roof Sheets. It is also important that insulation or Foil are cut to assure air movement through Vent-A-Roof Louvres.
5-degree is the recommended minimum pitch. For installation on a lower pitch please contact Vent-A-Roof for more information.