我有一个1970年代的半月，花园斜坡在房子的后部。所有地板都是悬挂木材。18个月前，当我购买它的时候，它有一个先前的精益型，它穿过了大部分后墙。它位于现有混凝土基地顶部的凸起的砖基上。混凝土就像一个露台，沿着房屋的后部沿着围绕着附属车库的后壁围绕，在DPC下方。瘦小的基础是在DPC上方建造的，并覆盖了两个空气砖。我的建筑商在地板下检查了一下，并说尽管倾斜了约30年，但一切都处于良好状态，没有潮湿或腐烂。瘦身已经走了，他在现有混凝土基地的顶部放了一个露台。露台朝房屋的后部倾斜，他安装了一个排水通道，沿着后墙驶向现有排水沟（2019年7月铺设）。我的问题是该通道的顶部是DPC下方的1块砖，而空气砖直接在DPC下方，因此空气砖的底部孔位于排水通道的顶部相同水平。 Any water that might miss the drains or might pool against the house will go directly through the bottom holes of the air bricks and cause damp over a period of time. I can't afford to rip up the patio and the concrete base to slope it away from the house but I need to find a solution before it becomes a major problem with damp. I was thinking of moving the drainage channel out from the wall and sinking them down another 1/2" so that I can fill in the gap from the house with cement that can slope towards the drains. I have also looked at periscope air vents but I haven't really got a clue whether either of these will work. Any advice would be much appreciated.