Whirlybirds, also known as turbine vents, are a popular ventilation solution for residential and commercial buildings. They are designed to rotate and create a vacuum effect that pulls hot air and moisture out of the attic, thus keeping the living spaces below cooler and drier. However, like any other mechanical system, whirlybirds can break down or malfunction over time. In this article, we'll discuss some common whirlybird problems and provide practical tips on how to fix them.

Problem #1: Whirlybird doesn't spin

If your whirlybird doesn't spin, there could be several reasons for this. One possible cause is that the turbine is stuck or jammed with debris, such as leaves, twigs, or dirt. To fix this, you need to climb up to the roof and remove the obstruction using a broom, brush, or compressed air. You may also need to lubricate the bearings to ensure smooth rotation.

Another possible cause of a non-spinning whirlybird is a damaged or worn-out spindle. The spindle is the metal rod that connects the turbine to the base. If the spindle is bent, corroded, or loose, it can prevent the turbine from spinning. In this case, you may need to replace the spindle or the entire whirlybird unit.

Problem #2: Whirlybird makes noise

Whirlybirds are designed to be quiet and unobtrusive, but sometimes they can make noise, especially if they are old or poorly installed. Some common whirlybird noises include whistling, rattling, or squeaking. To fix these noises, you can try tightening the bolts or screws that hold the whirlybird in place. If the noise persists, you may need to replace the bearings, which can wear out over time.

Problem #3: Whirlybird leaks

If you notice water or moisture dripping from your whirlybird, it's a sign that the unit is leaking. This can be caused by a damaged or cracked turbinez, a loose or damaged flashing, or a damaged roof. To fix this, you need to identify the source of the leak and repair or replace the damaged parts. If the roof is damaged, you may need to call a professional roofer to fix the issue.

Problem #4: Whirlybird doesn't vent properly

If your whirlybird is not venting properly, it can cause a buildup of heat and moisture in your roof, which can lead to mould, mildew, and other health problems. One possible cause of poor ventilation is an obstruction in the ductwork or vent pipes. To fix this, you need to check the ducts and pipes for any blockages and remove them using a vacuum or a brush. You may also need to clean or replace the air filters to ensure proper airflow.

Another possible cause of poor ventilation is an inadequate number of whirlybirds for your roof size. If your roof is large or has many gables and peaks, you may need to install additional whirlybirds to ensure proper ventilation. You can calculate the required number of whirlybirds using a simple formula based on the roof area of your home.


Whirlybirds are an effective and affordable way to ventilate your roof and keep your home cool and dry. However, like any other mechanical system, they can develop problems over time. By following the tips in this article, you can diagnose and fix most common Repair Whirlybird problems, and ensure that your whirlybird is working properly and efficiently.

Author's Bio: 

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