Decrease attic heat in climate zone 2B?
I am remodeling a 50 x 50 wood structure that did not have Tech Shield or insulation when built. I have build an apartment in the building (1200 sq. ft). with blown insulation to R-38 standards in the attic. However the portion of the attic not over a HVAC space is not insulated. Would 1″ foam board with foil nailed to the bottom of the 2×6 rafters with openings at the top and bottom, (5.5″ of open space between the decking and foam board), be effectivei in reducing the heat in the attic. If an area at the bottom and top would be left open to allow proper ventilation. Possiblitiies (foil, foam board, fan ).
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