“Leaky house, endless rain,” is the more property-minded Mandarin equivalent of the English saying that it never rains, but it pours.
英文中有句谚语：“这里不下雨则已，一下就是倾盆大雨。”中文里的对应说法更加着眼于房子——“屋漏偏逢连夜雨”。