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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 # e) F2 o$ F1 V& j: d4 f
what happens if there is persistent condensation? ; s4 P' ?3 R# h3 _- [) [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.