Damp Proofing in construction is a type of physical protection installed to building foundation walls to prevent moisture from passing through the walls into interior spaces.
A damp-proof course (DPC) is a horizontal barrier in a wall designed to resist moisture rising through the structure by capillary action - a process known as rising damp. A damp-proof membrane (DPM) performs a similar function for a solid floor. Moisture resistance is not necessarily absolute: it is usually defined by a specific test method, limits, and engineering tolerances. In simpler words, DPC is used to stop dampness transmitting into buildings. In theory, due to capillary movement of water, water rises from earth to the building. Passing through foundations it rises higher to reach walls. So, to avoid water from reaching walls, in new-build properties we lay a DPC layer at plinth level (the joint level of walls and foundations). DPC membrane is 100mm (4") to 225mm (9") when used in new-build construction. Over time however, these membranes can break down allowing moisture to pass the level at which they are installed
In reality True Rising Damp rarely occurs and many reports of Rising Damp are misdiagnosed. Nearly every occurrence of so called 'Rising Damp' can be properly diagnosed by engaging the services of a reputable, experienced surveyor as opposed to the 'specialists' who will treat all dampness issues the same way. Condensation, penetrating damp, or the improper use of impermeable materials are most regularly identified as Rising Damp. B.C.Associates will endeavour to identify and rectify all problems with a suitable maintenance repair or referral to a suitable partner/contractor as required. Furthermore, where applicable, we will produce written reports outlining all necessary requirements relating to any issues brought to our attention for works carried out by B.C A or other reputable bodies
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