We are looking into building a 3 season porch in S/E Wisconsin, and are considering a concrete slab floor. Is it worth putting in 2 layers of 2" rigid foam under the slab, instead of just 1 layer? The porch will be about 12' X 19', with the floor about 16" above grade. Thanks.
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17,000 dryer fires a year, when did you last clean the inside of the dryer near motor or the exhaust ducting?