A ridge and soffit ventilation system an extra 200 during reroofing will reduce attic temperature to around 100 degrees.
Best way to reduce heat in attic.
When reroofing use white or pale gray shingles instead of dark ones.
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.
An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.
The air you lose from the attic is then drawn into your home from the outside which will cause your cooling bill to go up.
While it does help to reduce the heat in your attic putting these fans in your attic costs more because of the loss of conditioned air.
But by adding powered attic fans you will draw more air into the attic.
And it can cause your air conditioner to work harder than it needs to and send your energy bills soaring with the temperature.
If you don t worrying about how best to keep the attic cool is a bandaid on a self inflicted wound.
Your attic can get as hot as 150 degrees in the summer.
Also make sure your attic is ventilated.
Gable vents around 25 each plus 75 per vent for labor can lower attic temperatures about 10 degrees.
Seal spaces around plumbing recessed lights and vents.
The way your attic retains or releases heat can affect your entire house and implementing a simple set of solutions can make your attic more energy efficient.
4 ways to reduce attic heat in your home.
Keep that super heated air from seeping into your living space.
An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate.