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| Just built one in 18 with a full basement roughly the same size. Vinyl siding 1/2” of foam with bats over that on exterior walls metal roof. Waterproof vinyl plank flooring. We went with a heat pump so far so good different kind of heat and electric bill is not that bad. we cook and heat water with lp use less than 500 gallons a year. I recommend a tankless water heater. If you like to grill make sure you put a gas line to your back porch. | |
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