Attic Temperature Too Hot

If hot air is allowed to sit in your attic it could overheat the shingles on your roof and cause damage.

Attic temperature too hot.

Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. At the very best conventionally ventilated attics can never be cooler than the outside air temperature. Whether it s 110 f or 130 f there s not much difference in the amount of heat flowing from the attic to the living space below. Just make sure the ceiling is airtight and fully insulated and the temperature in the attic doesn t matter much.

And it can cause your air conditioner to work harder than it needs to and send your energy bills soaring with the temperature. If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals. If it s 90 degrees outside the attic temperatures shouldn t. Note excessive heat.

But by adding powered attic fans you will draw more air into the attic. In addition hot air in your attic could increase moisture levels which could result in wood rot and mold growth. The thermostat will usually start at 95 degrees fahrenheit which is the temperature that the attic fan usually starts at. Unless your roofing system has insulation on the roofing deck and is designed without ventilation your furnace should not be heating your attic.

An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be. Having a properly vented attic is the best way to keep attic cool because it allows the hot air to escape during the summer. That is certainly too hot but how hot is ok. Hang pencil and paper next to the thermometer and record the outdoor and attic temperatures for several hot days.

This is because the attic is essentially open to the outside air. Using insulation only keeps the attic s heat from traveling through your home.