天气冷,湿度高 you have already answered your own question. It is a common phenomenon./ T7 z& M, R. V6 q5 K0 C
Ask your builder, they will tell you what exactly run above and make that sound.
8 G2 w# d& T5 ^" u, Q/ d$ mWe have 类似水滴的声音 from the beginning and been this house for 3 years. % M# L( S5 C! R
Nobody tells us what exactly that is. A city guy can't tell us anything about that., k0 k! l* w2 g7 Y! g1 S7 N
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The house is good so far, so we just leave it alone.