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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 h: A/ @* {+ k! K
what happens if there is persistent condensation? $ f* D+ l. G8 i9 j8 k. E9 Jblinds and curtains are left open all the time, t ...
" T( u, i1 u1 w: @good question. it means your indoor humidity is too high. many reasons: cooking, air leakage, rh too high, or insulation problem around your windows.