Multiple uses of Vent-a-Roof

Frequently Asked Questions about Vent-A-Roof


Fresh outside air is taken in either through soffit vents or in through the system itself. This cooler air rises from these intake points and mixes within the ceiling or building space to create a natural flow of air that leaves the hot air escaping through the top of the ridge/skillion. Simultaneously, a positive airflow also crosses over the ridge of the house creating a negative pressure which pulls air out from the ridge vent. Effectively, two thermal effects create a continuous flow of air allowing cool air into the roof/building space and extracting hot air.
The key 5 benefits include
  • Condensation Management
  • Increasing liveability
  • Energy Efficiency
  • Building compliance
  • Extends the life of the building and increases structure integrity
Yes, however the more air movement we can generate the more effective the system will work.
All current Colorbond colours are available to match existing roof sheets.
Vent-A-Roof is a completely waterproof system under recommended installation guidelines tested to extreme wind-driven rain standards of 177km/h with flawless results.
We recommend a qualified, experienced Roofer, however talk to our experienced install team for more information.
Vent-A-Roof is currently designed for metal roofs only.
Vent-A-Roof utilises the natural flow of air – meaning no moving parts, power, or noise.
There are multiple design options based on building type. For large commercial and industrial sheds we recommend venting the entire top ridge section, however residential ventilation options can vary depending on design, size and budget.
Unfortunately no, in a retrofit scenario, new ridge capping would be needed to allow the system to work, however, the new ridge capping can be moulded into existing ridging seamlessly. This means only parts of the roof where Vent-A-Roof is installed would need replacing.
Like for like on new installs, Vent-A-Roof is a cheaper alternative to traditional rotary vents. However, this comparison is apples and oranges. Each install can be tailored to each client’s budget or airflow requirements.
The ceiling space of a home can rise to 70 degrees on a 35-40 degree outside temperature day. Vent-A-Roof can drop this temperature down to external ambient temperature under the right wind conditions. This decreases the overall heat of the roof space, lowering the internal living space temperature – essentially reducing the need to run costly air conditioners.


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 louvres.
Yes, we print the instructions right on the box. They are also available on our website as a download. Our team is always available for troubleshooting installation if required.
Absolutely, it will work! You are describing what is known as “saw-toothing”, which means the panels are staggered (mostly a hip sheet condition). There are several potential causes of this condition but we 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 re-cutting the sheets to make the sheets straight, keep in mind to make a weather-tight seal, the sheets need 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” sheet 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 air gap 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.
NO, we only recommend the turning up of roof sheets for a concealed clip profile with a roof pitch below 5 degrees. Outside of this, it is preferable not to turn 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 test data of this exercise available to the public.
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.
We recommend a gap of 75mm at the top of the roof sheets. It is also important that the insulation or foil is cut back to assure uninterrupted air movement through Vent-A-Roof Louvres.
2-degrees is the recommended minimum pitch and this can be achieved with either 5 Rib or Concealed Clip roof sheet