Table of Contents
How Many Vents Do I Need? The general rule of thumb in these situations is of roughly one vent per every 300 square feet of attic area if the attic has a vapor barrier. If not, there should be one vent for every 150 square feet. You will need to have 1 square foot of vent area for every 150 square feet of attic space.
How many turbine roof vents do I 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.
How many whirlybird vents do I need?
How Many Whirlybird Vents Do I Need? As a general rule, a roof needs one whirlybird or roof vent for 50 square metres. This roughly translates to one whirlybird per bedroom when determining how many roof vents should a house have.
Can you have too many roof vents?
Dangers of Too Much Ventilation The two main dangers associated with too much ventilation involve roof damage and increased utility bills. If you have too much air circulating, your roof will collect moisture causing damages that will weaken spots and then cause leaking.
Should I cover turbine roof vents in winter?
Roof ventilation is important year-round. 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.
What size roof turbine do I need?
Measure the square footage of your house and calculate the number of vents necessary for them to work properly. Refer to the chart in the references section for further details. For example, a house that is 1,300 square feet requires two 12-inch wind turbines.
Are turbine roof vents any good?
They are incredibly effective at venting hot attic air, but there’s not always room for them. When an attic space needs ventilation but there’s no more room for ridge vents, turbine vents are usually the next best solution. They are very flexible regarding placement, and there’s almost always room for them.
How effective are whirlybirds?
Whirly birds just by themselves are not very effective. They require vents (either in the eaves or in the ceiling of the house) to let cooler air in as the warm air is expelled through the turbine. So, if you are getting whirly birds installed, make sure that there are adequate ceiling vents to allow air replacement.
Do whirlybirds let rain in?
When installed by professionals, whirlybirds do not leak or let in rain. When there is no wind and the turbine is not spinning, the rain water simply runs down the outside of the fins on the whirlybird turbine.
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.
Do turbine vents need to be level?
The one thing I’ll mention is that turbine vents need to be installed perfectly level; when they’re not installed level, they don’t turn. That bears repeating: do not install turbine vents if the attic has not been professionally air-sealed.
How much does it cost to install a roof turbine?
Roof Turbine Installation Expect to pay $65 to $250 to install a roof turbine, including labor and materials. Units are priced $20 to $100 each. A pro can install one in an hour or two at a rate of $45 to $75, for a labor total of $45 to $150.
Are ridge vents 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.
Can I over ventilate my attic?
Just like properly sizing your furnace and air conditioning unit, you want precisely the right amount of attic ventilation for your home. Insufficient ventilation can lead to moisture problems during the winter and decreased energy efficiency during the summer but too much ventilation can be just as bad, if not worse.
How many vents do I need in my attic?
How Many Vents Do I Need? The general rule of thumb in these situations is of roughly one vent per every 300 square feet of attic area if the attic has a vapor barrier. If not, there should be one vent for every 150 square feet. You will need to have 1 square foot of vent area for every 150 square feet of attic space.
Do whirlybirds make your house colder in winter?
In fact, whirlybirds help expel moisture during winter months, keeping the air drier, and can help mitigate that ‘cold’ feeling from moisture in the air.
Do whirlybirds work in winter?
The benefits of whirlybirds in winter Whirlybirds remove damp air which means they reduce power bills in winter. Moisture laden air from inside the home, and outside air, can condense and cause dampness.
Do whirlybirds make noise?
#1 – They Are Noisy A functioning wind driven whirlybird is quiet, so if it’s making noise, it’s most likely broken. Usually this is the result of the whirlybird being bent or the bearings being worn out. Some of the cheaper imported whirlybirds are notorious for this problem.
How do you size a turbine vent?
Take the area of your attic and multiply the number by 144. Now, that gives you square inches in place of square feet. After that, take the number and further divide it by 300. The answer is the amount of ventilation that your attic needs.
What size is a whirlybird?
Whirlybird® turbines offer all of the essentials for energy savings and are geared toward going green. Lomanco® wind turbines are available in three sizes—8″, 12″, and 14″. The 14″ Big Whirly turbine moves 37% more air than the 12″.
