All modern British components have a damp proof course. In components that are less than 30 years old, this includes a damp proof membrane, which is an dense layer of articles (normally a high-density polyethylene) that's set up in the bed page put together between two applications of rocks. Its work is to prevent water in the world from improving up through the brickwork via capillary measures ('rising damp'), which can leave areas damp.
Why do you need it?
Not only can the not enough a damp proof membrane cause to serious unhealthy problems; it can also outcome in type and insufficient within air excellent, which is challenging for those with respiration conditions. External type can cause wooden rot that will progressively require a structure's structural stability. Wood-boring glitches are huge fans of unhealthy cellars. And they can significantly harm floor joists and can handle.