现房主是个单身老太，房子是70年代的，前段时间屋顶换过几片瓦，今天给我来了封信
Our client wanted us to let you know that since the roof repair work has
been done, she has occasionally heard some slight sounds within the wall
between the master bedroom and the second bedroom. She wanted to be sure
that you were informed.
这会是什么问题呢？
