天气冷,湿度高 you have already answered your own question. It is a common phenomenon. 2 u$ v6 n( q: OAsk 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. 3 y; q' ^ w% ^
Nobody tells us what exactly that is. A city guy can't tell us anything about that. * N: D S) d9 F3 |" a6 a6 k% `# A# t0 N/ k. O
The house is good so far, so we just leave it alone.