What should your attic temperature be in the winter?

The ideal attic temperature should be no less than 60 degrees in the winter and no more than 10 to 20 degrees above the outdoor temperature in the summer. If your attic temperature climbs above 130 degrees, you may start running into issues with your energy bill, as well as the integrity of your roof.

How hot is an attic on a 100 degree day?

Thanks to the radiant heat affect, attic temperatures on a 100-degree day can reach 170 degrees or more.

How hot is an attic on a 90 degree day?

125 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. Ridge vents help – excessive heat can escape through ridge vents.

Why is attic hot in winter?

Many attics contain ductwork that supplies cool air to upstairs rooms during the summer and heated air during the winter. If the joints in your ductwork are not properly sealed, your forced air system can suck attic air into the ducts –air that’s either really hot in the summer or really cold in the winter.

How much hotter is an attic than outside?

Attic temperatures should be as close to outdoor temperatures as possible. The attic temperature should be 10-20 degrees warmer than the outside temperature in the summer. Attic temperatures over130 degrees Fahrenheit can cause premature age shingles, overwork HVAC systems, and cause high energy bills.

Does a hot attic make house hot?

There are many things that can contribute to making your house hot. A hot attic can definitely be one of the culprits. Hot air that sits in an attic can radiate down into cooler living environments if there is not enough insulation, or if the attic is not properly air sealed.

Should I keep my attic door open?

As you know, cold air settles and hot air rises. Opening your automatic garage door will let cool air and a draft in; opening your attic access panel will draw that air into the attic and help to push the hot air up there and out through the roof vents, assuming you have proper attic ventilation.

Should my attic be the same temperature as outside?

Should you close your attic vents in winter?

You should absolutely leave your roof vents open during the winter – do not cover them! During the winter, roof ventilation works to keep temperatures even. Closing your vents makes the attic space too warm and dry – dangerous conditions for mold as well as pests.

How can I improve my attic ventilation?


  1. Assess Your Needs. Before you make any changes, it’s important to determine if your attic actually needs additional ventilation, and if so, how much.
  2. Insert Roof Vents.
  3. Add Soffit Vents.
  4. Install Gable Vents.
  5. Use Fans to Improve Airflow.