Home Improvement

What do roof turbines do?

In winter months roof turbines remove the excess heat and moisture from your attic and can prevent major damages to your roof. In the hot summer months warm air rises to the attic. During these months roof turbines are designed to remove the heat from the attic and help keep your entire home cooler.

Are roof turbines necessary?

Why do you need roof turbines? During winter months, warm air rises into your attic. Without proper ventilation, the extra moisture in the heated air will cause wood rot, mildew, mold and exterior problems like ice dams. Roof turbines remove attic moisture and reduce the risk of costly roof damage.

Are turbine roof vents better?

Still, despite running the entire length of your roof, ridge vents are static and won’t move air the same way turbines do. As long as there’s a healthy amount of wind to power them, turbine vents will provide superior ventilation for your attic.

How do turbines work on a roof?

They are a style of roof vents that mainly rely on wind to spin the turbine. When this turbine spins, it causes air from the inside to be drawn up through the vent. Warm air is the one that will be drawn through because it is the one that rises, and the vents are mounted on the roof of your property.

How many turbines does a roof need?

But how many roof vents does one home really need? A general guideline is homeowners need one square foot of roof vent for every 300 square feet of ceiling space, if your home has a roof with a vapor barrier, or 1:300. If not, you should have one square foot of roof vent for every 150 square feet, or 1:150.

What are those spinny things on roofs?

You’ve probably seen them – those round little knobs poking up from residential rooftops. Those are turbines (a.k.a. whirlybirds), a type of roof vent that provides a valuable service no homeowner should overlook. Here’s what to know!

Should roof turbines be covered in winter?

You should absolutely leave your roof vents open during the winter – do not cover them! During the winter, roof ventilation works to keep temperatures even. Closing your vents makes the attic space too warm and dry – dangerous conditions for mold as well as pests.

Why is my roof turbine not spinning?

The two very common reasons are rusted — vents and obstructions not letting the vents to spin. If the vents are rusted, they need to be replaced because they would tend to stick and not spin, and obstructions such as dust, ice, leaves, etc., need to be removed.

Is ridge vent better than turbines?

While ridge vents win for their subtle appearance and functionality, turbine vents may be better in especially hot or humid climates where more dynamic airflow is necessary. If you are not sure which to use, consult a roof professional who can examine the needs of your home and draw up a venting plan for you.

Do turbine attic fans work?

Highly Effective. In low wind situations, turbine vents do an admirable job of moving warm air out of the attic areas of a property. However, when the wind is blowing, these vents turn into a powerful vacuum of warm air, drawing it up through the vent as effectively as any powered alternative.

Do whirlybirds let rain in?

Do whirlybirds leak? When installed by professionals, whirlybirds do not leak or let in rain. Whirlybirds have been installed throughout Queensland for the last 100 years – and if they leaked, there would be a lot of soggy ceilings.

Do you need a whirlybird?

Whirlybirds and the ventilation they provide are also useful in winter too as they help remove moist air, resulting in lower winter energy expenses. They do this by preventing moisture-laden air from both inside and outside the home from condensing and causing dampness.

What type of roof vents are best?

Soffit vents are a favorite amongst home builders and roofers because they are unquestionably the most effective intake vent for the cost. If a home’s style allows for it, most new construction builders include soffit vents in their home’s blueprint.

How does a roof turbine vent work?

Turbine vents (also known as whirly birds) work by using a drawing effect through convection (heat rising) to move the air in your attic around even when there is no wind. As long as this type of vent is installed properly, the air in your attic is moved around 10-12 times per hour.

Do solar powered roof vents work?

Other than being less noisy, a solar-powered roof vent offers better efficiency than a standard, wind-powered vent. Additionally, they carry better airflow capacity, making them more effective in ventilating homes. Just make sure to have a professional install your solar vent.

Do whirlybird roof vents work?

The answer to the question “do whirlybirds work?” is yes. Whirlybirds work to remove hot air from roof voids, effectively ventilating the room or space below. However, whirlybirds are relatively dependant on airflow to function properly.

Do whirlybirds work with no wind?

#4 – They Don’t Work When There Is No Wind



Whirlybirds are designed to spin in even in the lightest winds. Whirlybirds extract hot air via two ways; convection and creating a vacuum. The vacuum potential is driven by the wind speed and drawing heat out of the roof space.

Do whirlybirds make your house colder in winter?

No, whirlybirds won’t make your home cold during winter. Just make sure you don’t leave your windows or screen doors open over a prolonged period of time which may cause cold air to be drafted in.

How long does a turbine vent last?

A single 12-inch-diameter turbine vent can provide a complete change of air in the attic space every 52 minutes if the outside breeze is just 5 mph. A 14-inch diameter unit can provide a complete air change in the attic every 14 minutes if the wind is 15 mph.

How do roof turbines keep water out?

During installation, turbine vents are sealed at several points to prevent water penetration. The base of the vent, where the flashing meets the stack, the nail heads, the bead joining the upper and lower sections, and the vertical seams in the stack are typically sealed with roofing cement or silicone caulk.

How do you lubricate a roof turbine?

How to Lubricate a Roof Vent Turbine

  1. Set up the ladder against the edge of the roof. …
  2. Climb up the ladder and make your way up the roof to the turbine vent.
  3. Apply white silicone spray lubricant, in several locations around the turbine vent, where it rotates on its base.


Should roof turbines always spin?

Attic turbines should spin as heat rises. Attic turbines will help to keep moisture from inside the roof. The spinning turbines pull warm air from the attic more quickly. But if turbines won’t spin the effectiveness of your ventilation system decreases.

Why do whirlybirds spin?

The spinning movement is so unexpected. The spinning effect is due to the action of air on the wings as it rushes past the dropping whirlybird. You can check this by holding the whirlybird and pushing up on one wing with your finger. The body moves back as the wing is forced up.

How do I stop my kitchen fan from rattling?

Start by replacing the backdraft damper directly above the vent hood. If that doesn’t solve the problem, install a second damper near the wall or roof discharge cap. The second damper will greatly reduce the clanging problem.

How do you fix a whirlybird roof?


I'm replacing the whirlybird I've put it back up covered up the hole. And I've just about to remove the plastic cover on the hole. There in case it rained and replace the whirlybird.

Do turbine vents make noise?

While you might prefer turbine roof vents over other roof ventilation methods, it’s important to consider they come with their share of problems, especially if they’ve been on your roof for quite some time. Roof turbine vents can develop a squeaking sound, leak, or stop spinning.

Do whirlybirds make noise?

They Make A Lot Of Noise



If your whirlybird is making noise, it means that something is happening that shouldn’t be. A functioning whirlybird is almost silent and will only make noise if it’s broken. Cheap or incorrectly installed whirlybirds are often prone to this.

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