How Much Attic Air Leakage Should I Have

Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation.

How much attic air leakage should i have.

Drafts are typically found around windows and doors and while these drafts should be fixed immediately these are not the most substantial air leaks. Locating air leaks in the attic. Before you crawl into the attic make a quick sketch of the floor plan. You need to make sure that ductwork is properly sealed to prevent moisture build up in the attic.

By heather hedrick on december 14 2017 11 00 am. Of vent for every 300 sq. They claim that their work should lower our. Most people consider air leaks to be drafts.

Make note of dropped soffits over kitchen cabinets or bath vanities slanted ceilings over stairways or any other dropped ceiling areas. A home energy company has proposed a solution that involves sealing air leaks in the bedroom ceilings attic floor sealing around the chimney weatherizing the attic hatch insulating a few roof areas that the builders missed and adding cellulose to the rest of the attic to bring it up to r 60. If you have a fan pull down stairs or other fixtures in the attic they also need to be. They can disrupt the air flow through the attic when you have gable vents the airflow coming in through the soffit or overhang vents can be disrupted by cross ventilation from the gable vents.

Do i have a roof leak or attic condensation. Now that you ve air sealed your attic and basement check your attic insulation levels and add more if necessary. In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. If the system is working properly it will prevent moisture and mold.

Without exception you should talk to a professional to determine what your home requires. So how much ventilation should you have. You need to insulate the attic even if you can t easily access it because it s a huge risk for air leaks and potential heat loss. These areas usually have open stud cavities leading directly into the attic that are huge sources of air leaks photos 1 3.

Energy star states that the most significant air leaks are often hidden in the attic below the insulation. Your ventilation system should extract warm air from the attic and replace it with cool dry air via a soffit.