My Attic Is Tightly Sealed

Luckily building science has progressed and we now understand that the house is a system and part of good home performance is proper mechanical ventilation for air tight homes.

My attic is tightly sealed.

Pull up and dispose of any material that s compressed water stained or moldy it s useless. Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. As attic temperature rises rh in that air mass would initially decrease which would mean dp would rise and certainly not fall and would also be higher at the attic ridge than the attic floor. When we seal the attic with spray foam it s as tight as a butter tub.

However in a traditionally insulated attic insulation on the ceiling the attic is vented. Now that the house is properly sealed it is crucial to verify the attic s thermal insulation is adequate and properly installed. As you can see the benefits of a tightly sealed home far outweigh potential negative effects. Then use the numbers in the chart at right to estimate its r value.

1 attic living space have equal or close rh at some point in the day probably early morning in summer and 2 the attic was tightly sealed. The attic is usually where you can find some of the largest opportunities to save energy in your home. One huge benefit of the spray foam insulated attic is that conditioned air leakage from the ac furnace duct system is contained and used to condition the attic. The insulation on the floor of your attic needs to have an approved vapor barrier installed on the warm in winter side of the insulation.

Grab a tape measure and a flashlight to see what kind of insulation you already have in the attic and how deep it is. Sealed attics trap excessive heat and moisture which can lead to reduced shingle life. Courtesy of department of energy. Make your home tight and improve indoor air quality.

By air sealing in your attic you can stop many major air leaks and help to maintain the desired temperature throughout your home. Apply self adhesive foam weatherstrip tape to the top edge of the stop. Combined with attic insulation air sealing can help to alleviate the formation of dangerous ice dams in the winter. Poorly insulated ducting can cause heat loss in colder months and the loss of conditioned air in the summer in vented attics.