Roof ventilation is important year-round. During the winter, your home's roof vents allow moisture to leave the attic space, preventing the growth of mold and mildew that can occur even during this typically dry period. You should absolutely leave your roof vents open during the winter – do not cover them!
In the summer, the vents help release warm air and allow cooler air from outside to flow in. During the winter, the vents do the exact opposite by providing proper attic ventilation and allowing heating to remain in the attic in winter.
Without proper roof ventilation, you allow the attic to remain at a high temperature. This can damage and crack your shingles well before they should be showing signs of damage. Go with the flow. Roof vents create proper air flow, which reduces moisture that can build up inside an attic.
Yes, it is generally a good idea to turn off your attic power fan and close the vents during winter. Here's why: Prevent Heat Loss: In winter, the attic can lose heat if the fan is running, which can lead to higher heating costs. Keeping the fan off helps retain heat in your living space.
Heat Loss: Since whirlybirds continuously ventilate, they can lead to heat loss during winter, making your home colder. Wind Dependency: Because they operate using wind power, your whirlybird will likely be running when you don't need it to; during cold, wet and windy weather.
Beyond the energy savings, roof ventilation can also prevent many issues, including mold growth, ice dams, and structural damage due to moisture in your attic.
While it's true that covering roof turbines can reduce the amount of heat that escapes from the home, it's essential to understand the potential dangers of doing so. Covering these vents can trap moisture in the attic, leading to various problems, including mold growth and damage to the home's structural components.
Covering your roof vent pipe will prevent debris from accumulating in the drainage system, but it does have its drawbacks. The cover may prevent adequate airflow throughout the drainage system, which will affect the water pressure and could potentially cause wastewater to backflow.
Did you know that an attic fan can also play an important role in your attic during winter, too? It's true. An attic fan in winter can help prevent ice dams, reduce moisture in your attic during winter months and prevent mold and mildew buildup due to moisture problems in the attic.
To utilize your supply vents strategically, we suggest: Closing supply vents in higher locations by your ceilings while opening lower ones on floors or close to baseboards. Doing this will direct more warm air to the floor, where it will rise to heat the whole space.
Disadvantages of Turbine Roof Vents
Reliant on Winds: Turbine roof vents harness the power of wind to expel hot air from the attic. This reliance on wind is both their strength and weakness. On calm days with little to no wind, these vents may struggle to spin, reducing their efficiency.
When calculating how much attic ventilation you need, your roofer will either use the 1/150 or 1/300 rule. The one they use determines how much Net Free Ventilation Area (open area for air to pass through) you'll need for every 150 or 300 square feet of attic space.
1. Upstairs rooms are hot during the summer months. The first sign of poor attic ventilation is when your upstairs rooms are uncomfortably hot. Without proper attic ventilation, the hot air gets trapped with no fresh air being pulled in.
Low temperatures. For your home: Leave the heat on 'constant' to ensure a temperature of at least 5˚C throughout the property (including attic space) Open your attic trap door to help keep the temperature in your attic the same as in the rest of the house and prevent pipes freezing.
But there's something important we need to pay attention to when the snow starts to fall: snow can cover our roof vents and worse still, cause snow to blow into our attics. Even though it might not seem like a big deal, snow accumulation in our attics can cause serious problems.
If your attic is too cold, it probably lacks sufficient protection from outside temperatures. According to the U.S. Department of Energy (DOE), the average unimproved attic has just R-19 insulation – the insulation value of a five and a half inch thick fiberglass batt.
Why are attic fans not used anymore? Due to inefficiencies in relying on existing attic vents for air intake, attic fans have lost popularity. These vents often aren't designed for this purpose, resulting in inadequate replacement air supply.
If you're concerned about attic temperature control, a specific attic temperature range should help. Make sure your attic is no colder than 60 degrees Fahrenheit and no warmer than 10 degrees above the outside temperature.
If the evenings are cooler, you can try turning the attic cooling fan off until the morning, but if you notice your HVAC system begins to struggle to keep your home comfortable, you may want to keep running the attic fan overnight.
Roof vents undoubtedly play a crucial role in cooling your home, but it's indirect. While they don't actively blow cold air like an air conditioner, they work to regulate the temperature in your attic, which ultimately impacts the overall comfort level of your living space.
Excessive Heat in the Attic
With poor ventilation in house, the hot air concentrated at your attic's highest points stays trapped. This, in turn, can lead to uneven roof temperatures (ice dams), an overtaxed HVAC (higher energy bills), and other costly headaches.
For this reason, attic vents are essential to homes in cold climates, and they should never be covered in the wintertime. As the warm air in your home rises, moisture condensation occurs in the attic, and the accumulation of moisture can result in mold and mildew growth and rotting.
As HomeAdvisor explains, a roof turbine is a wind-powered exhaust vent that helps to tug unwanted heat and moisture from the attic space. When the wind blows, it spins, pulling air out of the attic.
Closing vents disrupts the airflow balance in your HVAC system, forcing it to work harder to maintain the desired temperature. This added strain can lead to a malfunctioning heating system and unnecessary wear and tear, reducing the system's lifespan.
Wind-Powered Performance
While wind speed can affect their effectiveness, traditional whirlybirds generally outperform solar vents in terms of airflow, especially during low winds. They're also less likely to catch debris than some solar roof vent designs.