Alternatively, install passive vents such as gable, soffit and ridge vents, which are openings in the roof that allow hot air to escape. No matter what ventilation system you go with, make sure there's one square foot of venting area for every 300 square feet of floor space.
There's a wealth of advice on how to cool an attic, such as getting passive vents like ridge vents and switching to a light-colored metal roof. But the big four hot attic solutions are: installing a radiant barrier, attic insulation, attic ventilation, and sealing cracks & air leaks.
In addition to being visually unobtrusive, ridge vents are also typically cheaper than other forms of attic ventilation. They rely entirely on the natural movement of hot and cold air, making them cheaper to install and operate than new electrical attic fans.
Many people don't know that a poorly ventilated attic accelerates shingle aging and warps the roof's wood sheathing. They won't make your roof last forever, but attic fans may reduce the wear and tear, improving the years of use you get out of your roof and delaying expensive replacement costs.
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.
Install electric ventilators and attic fans, which remove hot air from an attic. They have thermostats that turn the fan on at a recommended preset temperature of 100-110 degrees. Alternatively, install passive vents such as gable, soffit and ridge vents, which are openings in the roof that allow hot air to escape.
Note excessive heat – if it's 90 degrees outside, the attic temperature shouldn't be more than 110 degrees. More often than not, attic temperatures will be in excess of 125 degrees on a 90 degree day. This will overwork your air conditioning equipment, run up your utility bill and shorten the life of your roof.
By improving ventilation in your home's attic, installing an attic fan can help reduce moisture and even lower the temperature within your entire house.
An overheated attic has more significant consequences beyond raising your energy bill and causing you to sweat through a few T-shirts. An unventilated attic can reach temperatures high enough to bake your shingles and damage your roof.
An electrician, a handyman or an HVAC installer is able to install an attic fan as well.
Yes, in most cases you could benefit from an attic fan. Yes, attic fans really work! Attic fans (or gable or roof fans) are designed to blow hot and humid air out ofthe attic and ultimately lower the temperature inside. Typical attics will reach 120-150 degrees during the summer.
Moisture Problems: A lack of ventilation can trap moisture in your attic, which can lead to mold growth, rotting wood, and damage to insulation. Roof Damage: Excessive heat can damage your roofing materials, leading to premature deterioration and the need for costly repairs or replacements.
Whole house fans. A whole house fan is a primary natural cooling device that can significantly reduce or even eliminate the need for 'manufactured' cool air.
Add a few fans
Fans are an easy and affordable way to reduce heat in your attic, as they help to create a draft and make the room feel cooler. Switching on a few electric fans for an hour or two a day helps the air circulate through the room, eventually pushing the hot air out.
Ideally, the attic temperature should be close to the outside temperature, give or take 10 to 20 degrees. If your attic temperature is getting to 130 degrees or hotter, you can expect to see damage to your home. An attic can easily surpass this target in warm climates, getting as high as 160 degrees in the summer.
On hot summer days, you can run your attic fan throughout the day and night. If temperatures cool significantly overnight, you can choose to turn off your attic fan until the morning.
The power fan should be installed a few feet below the peak of the roof centered on the roof as best as possible. If multiple power fans are being installed because of the roof's large attic square footage, position the fans equal distance from each other; both a few feet below the peak of the roof.
On a 100-degree day, an attic can reach temperatures of 170 degrees or more due to the radiant heat effect.
If it's 90 degrees outside, most people would set their AC to a perfectly comfortable temperature of 68-72°F.
Rafter vents should be placed in your attic ceiling in between the rafters at the point where your attic ceiling meets your attic floor. Once they are in place, you can then place the batts or blankets, or blow insulation, right out to the very edge of the attic floor.
Wetting the roof is a swamp cooler, but you might be able do it inexpensively. Paint the roof white. Install a vent through the roof at a high point, so the warm indoor air can escape upwards.
AtticFoil™ works to block radiant heat (97%) coming in to the attic by stapling it to the rafters, but it has no R-value. More information about R-value and radiant barriers.
One of the primary reasons for hot attic spaces is due to poor ventilation. Without adequate airflow, hot air gets trapped, causing temperatures to soar.