My Attic Is Tightly Sealed

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.

My attic is tightly sealed.

When we seal the attic with spray foam it s as tight as a butter tub. 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. Combined with attic insulation air sealing can help to alleviate the formation of dangerous ice dams in the winter. Sealed attics trap excessive heat and moisture which can lead to reduced shingle life.

Now that the house is properly sealed it is crucial to verify the attic s thermal insulation is adequate and properly installed. When you re done sealing your attic bypasses push the insulation back into place with an old broom handle or stick as you back out of the attic. 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. However in a traditionally insulated attic insulation on the ceiling the attic is vented.

By air sealing in your attic you can stop many major air leaks and help to maintain the desired temperature throughout your home. Then finish up by sealing the access hatch with self sticking foam weatherstrip photos 10 and 11. As you can see the benefits of a tightly sealed home far outweigh potential negative effects. Poorly insulated ducting can cause heat loss in colder months and the loss of conditioned air in the summer in vented attics.

Make your home tight and improve indoor air quality. 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. Apply self adhesive foam weatherstrip tape to the top edge of the stop.

Pull up and dispose of any material that s compressed water stained or moldy it s useless. 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. Unventilated attics are common where roof assemblies are complex and it s difficult to create a sealed ceiling plane.