Frequently Asked Questions & Troubleshooting

Has the product been tested?

Yes, the product has undergone testing by the University of Technology , Sydney in their aerodynamics laboratory and has been verified to Australian/New Zealand Standard 4740 Natural Ventilators (performance and calculations).

15 Year Warranty on SkyVent please read


How does the SkyVent perform compared to other ventilators?

University testing results show that the SkyVent outperforms even a larger a 380 mm throat whirlybird style model fitted with a fan! For journal articles and university test results please click on highlights below:



Does the vent comply to the Building Code of Australia?

Yes, The product complies with BCA Volume 2 Table 3.12.12 and Volume 1 Table J1.4 (rooflights).

Can the vent be cleaned?

Yes definitely. One of the benefits of the SkyVent units apart from the one product providing the dual functions of both light and ventilation over other fixed diffuser light pipes is that it can be easily cleaned. Many fixed diffuser – sealed systems get dust and dirt into the diffusers and are hard to clean. With the SkyVent, this is easily cleaned as the diffuser can be readily removed and wiped clean and a feather duster can be used on the tube if required. Access to the dome can be made via the attic space if cleaning is required. Largely the unit is self cleansing by movement of the unit and ventilation. Due its smart design the unit will give many years of maintenance free service.

The vent makes a knocking sound when it turns.

Check that the variable pitch tube is not out of round, as assembly can produce an oval shape. The variable pitch tube can be shaped back into round by gently squeezing sides together at top.

The vent will not turn 360 deg when installed.

Check the top of the varipitch tube is perfectly level by laying a spirit level across the top of the varipitch tube north to south and east to west.

Check if the base of the vent is fouling on the fixing screws or varipitch, if it is fouling on the varipitch, bend or press the contact point inward until there is no further contact.

The vent is making a rattling sound in high wind.

Check the base is secured correctly and firmly to the battens by the fixing strap. Are all fixing screws tight?

Water is entering the roof cavity.

Check that all aluminium joints are sealed completely with roofing silicone.

Check surrounding roof tiles for cracks or broken corners. If so, replace or repair with roofing silicone. Check that the vent’s head is turning freely and the opening is not facing into the prevailing weather.

In certain weather conditions the vent head may be turning erratically or rotating.

Wind flow over a roof may cause turbulence and the vent will respond to those pressures. This is normal behaviour caused by short strong wind gusts hitting the ventilator side on, followed by a sudden calm condition (no wind). The unit will settle down when a steady stream of wind direction occurs. Multiple ventilators may also display differing directional characteristics due to roof shape affecting air flow.

Is the vent suitable for bushfire areas?

No, the vent has not been fitted with an ember mesh, ESA may look at this option in the near future but at the present it is not an option manufactured or supplied by ESA. To be effective and to stop embers penetrating under the gutter, sarking would be required to lap into the gutter also. If you are in a bushfire prone area it is best to adopt the precautionary principle for all roof vents and if a bushfire is imminent, a procedure of putting a reflective foil cover securely fastened to the head of the vent and or sealing the throat of the vent to stop extraction and ember draw through the gutter into the roof cavity should be considered.

Can silicone and adhesives be applied to the dome?

No. This is not a good idea and will void the warranty. The polycarbonate dome can be sponged with a light soap and water solution to clean but avoid adhesive and chemicals.

Dissimilar metals

Care must also be taken to not use dissimilar metals such as replacing screw fastenings with others not provided as electrolysis may occur. Use the materials provided and follow the instructions, you will then have a very successful product and enhanced product life.