Penetrating damp commonly occurs when there is a problem in a part of the Dwelling. This might be a hole within the roof, a broken gutter or only a badly fitted window or door. Sometimes it can be that the brickwork are very porous permitting the water to soak in like a sponge. We can prevent penetrating damp and hygroscopic salts (also known as efflorescence). At damp proofing we use the best modern membrane systems. This is a whole lot better the old school approach which is finished by means of making use of a salt inhibitor then a combination a cement primarily based damp proof membrane. This approach isn't always 100% successful. There is an excessive amount of hazard for human error and there's no way of knowing if a barrier has been created well enough and once the plaster is on it is too late. The cavity wall membrane system used by us means there is no need for salt inhibitor and you can see the physical barrier once it has been fitted.