It will help to keep the attic much cooler in the summertime.
Best way to lower attic temperature.
Again i m assuming that you re not considering a sealed attic lowering the temperature of an attic that contains ducts can reduce your air conditioning costs.
Get one that runs on a temperature sensor.
If your attic soars above 100 degrees and reaches the 150 mark its time to consult.
When reroofing use white or pale gray shingles instead of dark ones.
They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees.
They are readily available and easy to install yourself.
Also make sure your attic is ventilated.
The thermostat will usually start at 95 degrees fahrenheit which is the temperature that the attic fan usually starts at.
A ridge and soffit ventilation system an extra 200 during reroofing will reduce attic temperature to around 100 degrees.
Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape.
Use a thermostatically controlled roof mounted ventilator.
Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.
If you don t worrying about how best to keep the attic cool is a bandaid on a self inflicted wound.
Install electric ventilators and attic fans which remove hot air from an attic.
A solar powered attic fan would be best.
Gable vents around 25 each plus 75 per vent for labor can lower attic temperatures about 10 degrees.