Damp-proof course is a protective barrier within the inner layers of walls and is used to protect buildings from rising damp. Damp problems on walls can be caused by a number of different issues: It is crucial that a specialist accurately identifies the source of your damp problem. Damp Proof Course Cross Section indicating ground floor slab and inner and outer cavity wall dpc’s. A damp-proof course is a standard element which is required when building a property. In the case of a damp and humid atmosphere, a richer mix of concrete must be used. It is usually laid in two consecutive layers at the rate of 1.75kg/m² of the area. In case of the pointing and the plastering of the exposed surfaces, waterproofing agents such as potassium silicate, sodium silicate, zinc sulphates, aluminium sulphates, barium hydroxide and magnesium sulphate are commonly used. The bricks are laid in rich cement and sand mortar of ratio 1:3. In a masonry cavity wall, there is usually a DPC in both the outer and inner wall. At present, generally all the buildings are given the treatment of damp-proofing. Mortar is extensively used for the vertical damp proof courses. Historically, damp-proof courses may have been formed using bitumen , slates , lead , pitch , asphalt or low absorption bricks . There are various types of remedial damp-proof courses which can be installed into your property. But opting out of some of these cookies may have an effect on your browsing experience. Desirable Properties of Materials for Damp Proof Course (DPC), Materials Used for Damp Proof Course (DPC), Precipitation | 3 Types of Precipitation | Forms of…, 13 Desirable Properties of Bitumen | General…, Load Bearing Wall | 6 Types of Load Bearing Wall |…, Efflorescence on Damp Wall | Causes of Efflorescence…. For the DPC of floors and roofs,  flexible materials such as mastic asphalt, bitumen felts, plastic sheets etc must be used. g. To protect the floors from the detrimental effect of moisture movement such as reduction of adhesion, loosening of flooring etc. Pressure grouting is the method of damp proofing in which the pressure is applied for filling up the cracks and voids in the structure by cement grout thereby preventing the ingress of moisture.

As misdiagnosis will give the wrong remedial repair work which will not solve the damp problem and will cost you more as the work will need to be done twice. A damp-proof course is a barrier, usually formed by a membrane built into the walls of a property, typically 150 mm above ground level, to prevent damp rising through the walls. 4 (1) 5 (8) Filter products. 10 m (1) 20 m (1) 30 m (5) 180 mm (1) Colour. Unskilled labours can lead to poor workmanship which further results in faulty construction.

[1] Generally, damp proofing keeps moisture out of a building, where vapor barriers keep interior moisture from getting into walls. DPC Material for situations where differential thermal movements occur4. The purpose of this is to fill any voids in the concrete ensuring it is damp proof. The most common types of materials used for the damp proof course can be listed as follows: These are the materials that do not deform their shape and do not crack when subjected to loading. It must be strong enough to resist both the imposed live loads and dead loads without failure. Barriers may be a coating or membrane applied to the exterior of the concrete. identifying the cause of your damp problem, Richardson & Starling (Northern) Ltd. / Company registration number: 944470, Defective roof coverings or rainwater gutters or down pipes. Drip Irrigation (Trickle Irrigation) | Components and Operation of Drip Irrigation | 20 Advantages and Disadvantages of Drip Irrigation, Village Road (Rural Road) | Construction of Village Road | Features, Advantages & Disadvantages, Shallow Foundation | 4 Types of Shallow Foundation, Construction Accidents | 10 Causes of Construction Accidents | Preventive Measures of Construction Accidents, Unit Weight of Steel Bars | Numerical Examples | Formulas, Lap Length | Lap length of Beams | Lap Length of Slabs | Lap Length of Columns | Lapping Zone of Beams and Columns, Sill Level | Sill Height | 4 Purposes of Sill Level | Difference Between Sill Level and Lintel Level, Estimate in Construction | Purposes of Estimate | Importance of Estimate, Preliminary Estimate | Numericals of Preliminary Estimate, Kiln Seasoning of Timber | Advantages & Disadvantages of Kiln Seasoning | Air Seasoning vs Kiln Seasoning of Timber, Arrows in Surveying | Uses, Advantages & Materials Used in Arrows | 6 Differences Between Arrows and Pegs, Factors to be considered during the Selection of Materials for DPC, Factors to be considered during the Construction of a DPC, e. By use of Special Construction Techniques, South Asian Countries Approved to Start Construction of Large Projects, Earth Road | Types of Earth Road | Construction of Earth Road | Advantages & Disadvantages.

One of the most common types of damp problems which is faced by property owners is rising damp. No votes so far! [citation needed] In the outer wall it is normally 150 millimetres (5.9 in) to 200 mm (7.9 in) above ground level (the height of 2-3 brick courses). These systems are better suited to walls that are 600mm thick or more. d. The damp proof course must be laid such that it covers the entire thickness of the walls by excluding the rendering. Construction of the external wall of sufficient thickness can also be used as the damp proof course. The rigid materials are not capable of withstanding the traverse stresses and cracks when subjected to extreme loading. instructions how to enable JavaScript in your web browser.

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