天气冷,湿度高 you have already answered your own question. It is a common phenomenon./ W) Y1 d& v( V/ v* G+ h
Ask your builder, they will tell you what exactly run above and make that sound.
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We have 类似水滴的声音 from the beginning and been this house for 3 years. / p; T7 C7 P$ `Nobody tells us what exactly that is. A city guy can't tell us anything about that. 1 K6 |9 Z9 C" o- d. S% j9 ?6 W, S# o4 h2 U A' _+ O
The house is good so far, so we just leave it alone.