Seal any drafts from windows and doors install a mini split with a heat pump extend ductwork from central furnace up to attic.
How to keep attic temperature cool.
Install electric ventilators and attic fans which remove hot air from an attic.
Here are a few different options to explore when trying to figure out how to heat your attic.
Use a thermostatically controlled roof mounted ventilator.
Attic fans push out the hot air and pull in the cool air from the vents installed on your roof.
Adding an attic fan can improve the airflow in your attic to keep it cool.
The thermostat will usually start at 95 degrees fahrenheit which is the temperature that the attic fan usually starts at.
To ensure that the attic fan is working properly you need to make sure that your attic is sealed up tight where it touches the ceiling of the top floor.
Make sure you follow any building codes for your home and in your area.
If you don t worrying about how best to keep the attic cool is a bandaid on a self inflicted wound.
Using insulation only keeps the attic s heat from traveling through your home.
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.
Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape.
In existing homes the question is important.
They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees.