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The window covering does not increase any insulating R-value, but prevent indoor air movement. Condensation is the major problem.
DevenC 发表于 2013-12-26 12:49 , H$ q! q2 V4 T; L8 C/ d/ ~. t( G
what happens if there is persistent condensation?0 {% O0 y6 H: B2 ~- }3 Q6 H
blinds and curtains are left open all the time, t ...
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good question. it means your indoor humidity is too high. many reasons: cooking, air leakage, rh too high, or insulation problem around your windows.