Open Or Closed Attic
My parents house has two small windows in the attic that open.
Open or closed attic. Here s what s open or closed in la oc ie vc. Closed cell foam can also increase the racking strength of attic walls which. Although air should circulate year round through the attic your house will probably be more comfortable if you cover the foundation vents in the winter. My home has a whole house fan installed in the upstairs hallway ceiling when its cool at night that thing can suck the heat out of the house in record time.
Open cell foam has an r value of about 3 5 to 3 7 per inch while closed cell foam has an r value of about 6 per inch. To provide background the house has a hot unfinished attic with blown cellulose and fiberglass insulation beneath the floor and no insulation along. It even rained and the sill got wet but not the floor. After leaving the attic window open overnight it was amazing how cool it got in there.
App users for a better experience. When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still.