天气冷,湿度高 you have already answered your own question. It is a common phenomenon.# R7 Y& |, t8 L' R
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. g5 b. T. r/ E2 _
Nobody tells us what exactly that is. A city guy can't tell us anything about that.8 ~* g$ A* H z3 ^
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The house is good so far, so we just leave it alone.