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Aug 13, 2024 · A damp proof course (DPC) is a protective layer near the bottom of the walls of a building that prevents rising damp. Signs of a faulty DPC include visible dampness, mould growth, and structural damage to walls.
Nov 7, 2023 · A damp proof course is a barrier designed to prevent moisture from entering your home's walls. It's usually comprised of long strips of black plastic laid within a mortar joint located approximately 150mm above ground level.
- Ian Rock
- Introduction
- Identifying The Damp Proof Course
- Bending The Rules
- Workarounds
There are a number of alternatives to the modern dpc-on-a-roll, and these are sometimes found on older properties, particularly those built prior to the Second World War. The most commonly encountered alternatives are the brick damp course and the slate dpc. The brick dpc uses a clay brick with a very low absorption rate as a barrier to rising damp...
Where the dpc doesn't jump out and announce its presence, there are a few key indicators that can help in identifying the position. 1. - On many established properties, the dpc will usually be somewhere between 100mm and 450mm above the paving or ground level 2. - There is often a difference in brick type or brick appearance at the dpc 3. - Air-bri...
The Building Regulations require at least 150mm between the dpc and the ground or any paving. This is what is known as 'Best Practice'. However, there are situations where it is just not possible, or practical, to maintain this regulation. On professional work, and new build projects, every possible effort should be made to ensure the 150mm rule is...
The Dry Area arrangement
If you look carefully, you can see the biggest drawback of this solution - the channel becomes a collecting point for fag ends and other litter.
Drained channel arrangement
This is a workaround used where there is a problem with accumulation of litter or other concerns that render an open 'dry area' channel impractical. A land drainage pipe, usually a perforated plastic type, is laid at the base of the channel, connected to the SW drainage system at a convenient point and covered with a clean gravel to a level no higher than the dpc. The walling may be protected by a drainage composite or tanking. This is a 'last-resort' workaround, usually restricted to special...
Jan 5, 2019 · Damp proof courses shall adequately resist moisture from reaching the inside of the building. Issues to be taken into account include: positioning of DPCs; DPC materials.
A damp proof course acts as a barrier that prevents rising damp from permeating up through porous walls from the ground. It is typically installed between courses of brick and blockwork approximately 150mm above ground and is commonly used in modern construction to combat rising damp.
The primary purpose of a damp-proof course is to stop ground moisture from rising up through the capillaries in bricks and mortar, a phenomenon akin to how a sponge soaks up water. Without a DPC, this moisture can ascend walls, leading to damp patches, peeling paint or wallpaper, and in more severe cases, the deterioration of plaster and ...
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What is a damp proof course (DPC)?
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A damp proof course (DPC) is a barrier added to the interior walls of your property to prevent rising damp, which occurs when water is soaked up from the ground through capillary action. It then begins to travel up the walls, floorboards, skirtings, and joists, causing plasterwork and timber to rot.
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