1920s Craftsman home: Need help with insulation and efficiency
My wife and I currently own a craftsman 1 1/2 story home in the Washington, DC area, that was built in the 1920s.
I attached some drawings of the house. We have a single giant room on the second floor, with a shed dormer in the front and no dormer on the back. The attic spaces have insulation on the knee walls and the first floor ceiling, but not on the roof. I believe this is considered a ventilated attic, although there are only four vents total, two front and two back. I labeled the locations on the drawing.
We want to do a couple of things:
1) I want to make the home more efficient, currently the attic space gets ridiculously hot and that heat is definitely bleeding into the living space. This makes the air conditioner run constantly to maintain even a moderately cool space (78 degrees F).
2) We have recently enclosed what was previously a screened in porch. We insulated the exterior walls and floor and are now looking at doing the ceiling. My original plan was to use some 1 in furring strips along with 2 in foam and 1 in foam to create an air channel for the roof and the ventilated attic of the main home. I would also add additional soffit vents, since currently there are not nearly enough(at least by what I read on fine homebuilding). After reading a bit here, I’m not sure if this make the most sense.
Can you guys recommend the best methods to accomplish both of these goals? I currently can’t add exterior insulation to the roof as I am doing all of this myself and don’t have the money to pay someone. I don’t want to do spray foam for the same reason.
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