I’m building a 28’x24′ heated garage that has 4′ frost walls built with ICF’s. (3 1/4″ insulation on both sides of the concrete.) Will I benefit enough from putting 2″ insulation under the slabto make it worth it? The garage will only be heated to 50 degrees or so. Thanks!
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Keeping HVAC systems within the conditioned enclosure can be tough without a basement; one option is to use plenum trusses for the roof, which offer a space for equipment and ductwork.
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