Attic Temps In Summer

Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient.

Attic temps in summer.

Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. Hot summer weather poses the opposite problem for maintaining recommended attic temperatures. An overheated attic can bake asphalt shingles on the roof and cause them to deteriorate. The cooling load for a home air conditioner depends on the difference in temperature between the inside and outside air and reduction of attic temperatures from 155 degrees to 105 degrees f will result in a significant reduction in cooling load.

January 8 2010 5 15pm text size. What should the attic temperature be relative to the outside and house temperatures assuming a new supposedly well insulated house. An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be. The consensus seems to be that if you have the maximum amount of insulation in your attic floor for your area lowering the temperature of the attic by 10 or even 20 degrees will have a minimal if any impact of actual heating and cooling costs.

Aug 14 2017 if you ve ever had to go digging through your attic in the summer to try and find something you realize immediately the temperature in your attic is noticeably hotter. Control your attic temperature in summer one of the toughest spaces to maintain a consistent temperature is in your attic especially in the summer. Summer attic air temperatures with old terra cotta colored asphalt shingles peaked at 140 to 145 at 18 above the blown in fiberglass insulation layer at the attic floor. Attic insulation is crucial to home s energy efficiency both in winter and in summer when the temperatures peak so it is very important to know the signs of poor attic insulation.

In some cases attic temperatures can reach above the 150 degree mark. Damaged insulation will allow hot air to leak into your home during summer causing inadequate temperatures even with ac working overtime. Attics can reach temperatures of 150 to 160 degrees f during a summer day although outside air temperatures are only 95 to 97 degrees f. If it s 90 degrees outside the attic temperatures shouldn t exceed 110 according to home inspector jamison brown of amerispec home inspection services in poquoson.

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