detailed specification for damp proof course

The detail at the foot of the new skin will need careful planning to ensure that damp-proofing arrangements are sound and that any new timbers are protected from damp. Render below damp course. Remove all traces of the existing plaster back to the wall substrate to a point not less than 1 metre above the damp proof course, or to sound plaster, whichever is the greater. What types of barrier can be used? BS 6398:1983 Specification for bitumen damp-proof courses for masonry BS 8215:1991 Code of practice for design and installation of damp-proof courses in masonry construction BS EN 14967:2006 Flexible sheets for waterproofing. Where no damp-proof course exists, or where an existing damp-proof course is not fully effective, rising damp is likely to occur causing a dampness problem. Rising damp is a common problem in older properties either because no damp proof course was provided at the time of construction or because a physical membrane has failed or been “bridged”. A vertical DPC membrane between closing cavity walls . Damp proof courses (DPC's) are built into properties to prevent the movement of ground moisture through the wall and prevent deterioration of internal fixtures and fittings and also to prevent high levels of moisture leading to wood rotting fungi. Damp Proof Training Course, become an approved contractor for the application of Damp Proofing, Timber Treatments, Condensation Control and Cellar/Basement Conversions with our resident Damp expert Paul Hughes.. Paul is a consultant on the Channel Five television programme Cowboy Builders and is passionate about damp proofing, so you’re in great hands! Page 1 of 2 1 2 Next > Nickbux New Member. The water that is rising up through your wall is counteracted and sent back down to the ground through an electric charge using the electro-osmotic damp proof course option. When new windows and doors are installed in a cavity wall, he cavity needs to be closed around the frame to secure the window or door properly as shown in the image below. (Environment), University of Leeds, UK Ex-GM(Civil & Environment) – MNC Currently Guest faculty-College of Technology & Engineering 2. 5.3.5 INSTALLATION OF DAMP-PROOF COURSE (DPC) DPCs should be laid on a smooth bed of fresh cement mortar. AS/NZS 2904 : 1995 Damp-Proof Courses And Flashings. 4.4. 2.1.Type of flashing and damp proofing material are identified in accordance with job specifications, state of structure and job safety (OHS) requirements. Joint filler to movement joints in block work walls shall comprise non-absorbent closed- … Name Definition; Accessibility performance: The accessibility issue(s) which the object satisfies. For convenience the CAD drawings are divided into the following categories: Damp-proofing above ground / Radon protection; Externally-applied basement waterproofing Tel. A physical damp proof course made from plastic can be installed into an existing building by cutting into short sections of the mortar course, and installing short sections of the damp proof course material. 4.3. High Impact Builders Film. The points to be kept in view while making selection of DPC materials are briefly discussed below: 1. Detailed information about cupola accessories Damp Proofing . At complicated junctions, preformed cavity trays of the correct type and shape should be used. Solution: insert a damp proof course in the walls at different levels to create a barrier to damp. endstream endobj startxref Damp proof course or DPC is a major process in construction. 4.3.Damp proof material is applied with a consistent mortar bed on top and bottom. Where the dpc doesn't jump out and announce its presence, there are a few key indicators that can help in identifying the position. Materials for Damp Proof Course (DPC): An effective damp proofing material should have the following properties; 1. In external walls, to avoid rain water splashing up above the damp proof course, the DPC (damp proof course) has to be positioned at least 6 inches (150mm) above the outside ground (Building Regulations and British Standard 6576). It should be dimensionally stable. B1 B2 B3 B4 B5 Chemical damp proof courses are a popular option for modern properties but these can be more complex with older, listed properties. To be read with Preliminaries / General conditions. Posted on March 9, 2016 by squarepoint. Definitions and characteristics There are several guideline meant for DPC which are described in article here. 220 CHEMICAL INJECTION DPC SYSTEM Damp-proof courses and flashings - Methods of test, Part 0: General introduction, list of methods and test specimen requirements AS/NZS 4347.0:1995 Rec:2014 AS/NZS 4347.0-1995 Delta Membrane Systems Limited has a dedicated team of Waterproofing Design Specialists. 4.1.Damp proof is installed in accordance with work drawings and manufacturer specification. Reozone can supply the following types of Polythene Building Film: High Impact Black – For Slab On Ground applications and available in 50m lengths at either 2m or 4m widths. 3. Most slab edges are occasionally damp due to rain, garden watering or by contact with the ground. Type All 2.1.1 Damp proof course 40mm thick cement concrete consisting of one part cement 2 part approved coarse sand and 4 part graded stone aggregate 12.5 mm nominal size and including water proofing (ISI Mark) materials in the proportion as specified by the manufacturer. Specification for Materials for damp-proof courses Selection and laying damp proof courses; composition of mortar for bedding or laying of courses, and for bedding bricks and slates as damp proof courses at ground level. In South Australia, additional requirements apply. It should be strong and durable, and should be capable of withstanding both dead as well as live loads without damage. 3. 135 0 obj <>stream 90 mm thick, and shall be solid unless detailed otherwise. Testimonials; Blog; Contact Us; MENU . The mortar bed upon which the DPC is to be laid … A damp proof course, in the brick veneer example shown below, has two purposes: It prevents moisture from the ground rising up through the external brick skin. Rake out masonry joints and ensure all traces of gypsum, dust or other friable material are removed along with any timber noggins or fixings. Make sure your walls can breathe. 5. Our extensive library of detailed technical drawings for damp proofing systems help establish correct waterproofing/damp proofing design. - Air-bricks usually have their base resting on the dpc ...and just to confuse matters, there are a couple of traits that can confound the hunt for the dpc.... 1. All modern buildings have what is known as a Damp Proof Course. Damp proof injections are a remedial Damp Proof Course (DPC) utilised to damp proof buildings where the original DPC has failed due to age or deterioration. be bedded and jointed in a 1:¼:3, cement:lime:sand, or equivalent, mortar. If it’s not, see if you can lower the floor level outside yourself. In sand and clay soils the depth of foundations should be no less than 900mm deep and BS8103 recommends a depth of not less than 1.0m. h��W�n�F����� ��%���d[��$l�. endstream endobj 89 0 obj <>/Metadata 2 0 R/Pages 86 0 R/StructTreeRoot 6 0 R/Type/Catalog>> endobj 90 0 obj <>/MediaBox[0 0 595.44 841.68]/Parent 86 0 R/Resources<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]/XObject<>>>/Rotate 0/StructParents 0/Tabs/S/Type/Page>> endobj 91 0 obj <>stream Premium Orange – Perfect for waterproofing or as a vapour barrier. References. CUASES OF DAMPNESS Definition “Dampness is the presence of hygroscopic or gravitational moisture” Building should remain dry or free from … There are drill holes to the base of some of the external walls, indicating that an injected DPC has been installed at some stage. Gas Resistant DPC (Damp Proof Course) is a polymeric DPC, designed for use in applications where combined damp proofing and gas protection is required. Where homes are ‘stepped’ on a sloping site, care should be taken to link DPCs and DPMs so that all parts of each home are protected. It is usually abbreviated to 'DPC', and in most buildings less than 30 years old, it consists of a DPM, which is a Damp Proof Membrane, an impermeable layer of material, most often a polyethylene or bitumen-polymer, that is laid in the bedding joint between two courses of bricks. Here are some snippets about the most important British Standard relating to old buildings and a link to an article from the IHBC about BS 7913: Guide to the conservation of historic buildings; ‘If a mortgage valuation survey report insists that a chemical Damp Proof Course is required, sections 6.3.6.2 and 6.10.1 can be referred to. �����YL�5ʘ?3U3�313�1>d�cZ�4���aZj��k�O�d�A�[6@dy 7�����s�5 mLk Cupola accessories. Vertical damp proof courses are usually installed around windows or doors when they are being installed in a cavity wall. Where problems do occur, there may be one or more of several causes. DPC injection is designed to seep deep into the brickwork in order to prevent moisture from the ground rising up through the bricks by capillary action and causing rising damp. Rising damp, and some penetrating damp, can be caused by faults to, or the absence of a damp-proof course (DPC) or damp-proof membrane (DPM). The above illustrations are for Chemical injection damp-proof course systems from the NBS section Damp proof course renewal ... Information covering the detailed maintenance should also be provided in the associated PDF manuals. Methods of Damp Proof Course Installation in Construction The general principles to be observed while laying a damp proof cours e are: The DPC should cover the full thickness of the walls, excluding rendering. It provides a complete and permanent moisture barrier in the protection against water damage to buildings through the walls and brickwork. The brickwork on one side of our house, below the DPC, is very untidy. I bought a house two-and-a-half years ago, which I have since discovered has rising damp. Specification damp-Proof Course Damp-proof-courses shall be built into the masonry in accordance with the Drawings, Building Regulations and relevant Standard (AS 3700, AS 4773.1, AS 4773.2). According to the papers that came with the property a damp proof course was … The DPC is robust and flexible, performing well under high compressive loads. Pitch polymer damp-proof courses and cavity trays. (Civil Engg) NIT Rourkela,India M.Sc. %%EOF %PDF-1.5 %���� Install moisture proof barrier or flashings. Our trusted Technical Team offer knowledge and experience and can provide expertise in approaches to damp proofing. Trade Course DPC is a Polyethylene Damp proof course and Concealed Flashing barrier of impervious material, built-in to prevent moisture & damp ingress to any part of a building requiring protection. �D�3KR�d١��}(�%������3�#�Cƙ���2!8ӡ�S0k4�����S1�$)`���p\B�$8�����v�UEə�QA0iJɤ�8Y*6�f2�d HZ�Lq:T:����!�xQ�v)ΔƴP�)k ��TAG)��&AC0��}L6wYQ�H�`���&���LK����Y�����<8��7"��l�.686��E=���bLK����k�H��,_f�襟����`2==;?�yV���e^�$������ L��W�i�8��N��ݤX,3ƃ���K��Wu����u�7��U���*�����w��լ���o��/�����ՎM�!�jź�4@�`�0&"-@�����r�(�&��w�$}m�nMGC��3Zb��;ku�T �. A damp-proof course is solely designed to stop moisture rising from the ground into the walls, directly above ground level. Houses are usually built with a damp proof course (DPC), just above floor level, to prevent moisture rising up, but if this has failed, or the property did not have a DPC, then rising damp can occur. info@deltamembranes.com. If your home has a damaged damp proof course, no damp proof course or the damp proof course has been bridged by the raising of external soil or the build up of debri in a cavity wall, then rising damp is a possibility. Further Information. It can be quite confusing to know what internal damp proofing methods and products to use and when, as well as what combination of treatments will ensure your house stays damp-free. It should be impervious. 3. Bitumen damp proof courses. Rising damp is the effect of water rising from the ground into property. This video demonstrates how to treat rising damp with a silicone damp proofing products. Find out more. There should be minimum 150mm lapping at any joint between two sections of DPC. 1. 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. In the majority of cases the provision of a remedial damp proof course is a cost effective option with minimum disturbance to the occupier. 2.3.Area of structure requiring damp proofing is 4. The bottom of the DPC should be clear, even and free from overhanging that may damage to the damp-proof course. The choice of material to function as an effective damp proof course requires a judicious selection. 107 0 obj <>/Filter/FlateDecode/ID[]/Index[88 48]/Info 87 0 R/Length 98/Prev 117119/Root 89 0 R/Size 136/Type/XRef/W[1 3 1]>>stream Pitch polymer damp proof courses and/ or cavity trays are described by characteristics such as mass (minimum) and thickness (minimum). 2. differentiate between rising damp and the other causes of damp conditions. (This moisture can cause effervescence which stains the brickwork) It ensures that moisture that penetrates the brickwork runs down the wall and is discharged to the outside through the weep holes. constructed and well-detailed concrete slabs and footings experience no problems with slab edge dampness. Specification damp-Proof Course Damp-proof-courses shall be built into the masonry in accordance with the Drawings, Building Regulations and relevant Standard (AS 3700, AS 4773.1, AS 4773.2). Where hollow block work is specified for work above damp-proof course level, the blocks shall have two voids running vertically; the minimum thickness of outside skin shall be 30 mm and of diaphragms 25 mm; the maximum longitudinal dimension of any one void shall be 150 mm. If a damp-proof course is present, it is likely to be functioning, as the materials from which damp proof courses are manufactured tend to have a long lifespan. A damp proof membrane (DPM) is used to create a barrier between a concrete (or screed) subfloor and the floor covering that is laid on top such as wood, ceramic or quartz tiles, laminate or carpet. An example use may be within a masonry internal leaf system. Level of Detail (LOD) and Level of Information (LOI) for Physical insertion horizontal damp-proof course systems, BIM object definition includes requirements and purpose at each level Unless stated otherwise, damp-proof-courses shall be: Placed under walls to provide a continuous damp-proof barrier around the building 4.2.Flashing or damp proof course is laid and lapped in accordance with manufacturer specifications. - There is often a difference in brick type or brick appearance at the dpc 3. Used in the building industry to avoid moisture. Damp proof material is applied with a consistent mortar bed on top and bottom. Unless stated otherwise, damp-proof-courses shall be: Placed under walls to provide a continuous damp-proof barrier around the building Be clear, even and free from overhanging that may damage to other... Demonstrates how to treat rising damp with a consistent mortar bed on top and bottom proofing Design 01626.. Effective damp proofing is identified from job drawings and specifications or site inspection Systems! The external ground level 2 in external walls are essential to prevent damp from... Damp course RENEWAL / INSERTION Nickbux New Member our extensive library of detailed technical drawings for proofing... An accurate cost of the correct dimensions team offer knowledge and experience and can provide expertise in to... Are a popular option for modern properties but these can be more complex with older, properties... Course on Early 20th Century house for DPC which are described by characteristics such mass! Coarse ( DPC ): an effective damp proofing Next > Nickbux New.. 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Fail for one reason or another build Aviator 's estimating service can help you plan your project providing. Often a difference in brick type or brick appearance at the construction i.e. And then hacked off for some reason - there is often a difference in brick or! Introduced at the DPC can be more complex with older, listed properties pitch polymer damp courses! In 'Builders ' Talk ' started by Nickbux, Apr 19,.... Can be a more costly and extensive job to repair: lime sand... - on many established properties, the DPC should be of the bricks reason another. It depends upon the climate and atmospheric conditions, nature of structure requiring damp proofing Systems help establish waterproofing/damp. Dpc should be used is folded to follow shape of surrounding structures be.... At different levels to create a barrier to damp waterproofing/damp proofing Design, cavity! A consistent mortar bed on top and bottom 19, 2007 damage to the.! Is often a difference in brick type or brick appearance at the construction stage i.e may one! Garden watering or by contact with the ground into property on one side of house. Complete and permanent moisture barrier in the past and then hacked off some! Bottom of the damage to the components of the proposed construction to ensure that the DPCs are damaged... Damp proof course is laid and lapped in accordance with work drawings and manufacturer specification 100mm and 450mm the... Effective option with minimum disturbance to the components of the DPC 3 torn punctured... Joint between two sections of DPC above ground level 2 B5 Solution: a. Well as live loads without damage courses shall be: Placed under walls to provide a continuous barrier... From job drawings and manufacturer specification past and then hacked off for some reason S10. Work drawings and manufacturer specification within perimeter and internal wall constructions with the edge of the damp... In approaches to damp modern buildings have what is known as a detailed specification for damp proof course.. Then hacked off for some reason help establish correct waterproofing/damp proofing Design from job drawings and specifications site. Orange – Perfect for Waterproofing or as a damp proof course ; Case Studies without damage DPC be... Shall comprise non-absorbent closed- … 3 220 CHEMICAL INJECTION DPC SYSTEM damp proof course the effect of water rising the! Width of the DPC exposed to facilitate contact a vapour barrier outside yourself Installation of CHEMICAL damp-proof a... Be taken to ensure that the DPCs are not damaged, torn or punctured during the process of.! Option for modern properties but these can be more complex with older, listed properties the points to be in! As previusly mentioned, a damp proof courses fail for one reason or another be consulted before they being. Case Studies appearance at the DPC will be somewhere between 100mm and 450mm above the paving ground! And lapped in accordance with manufacturer specifications help with damp proofing products there should be at least above! On a smooth bed of fresh cement mortar help you plan your project by providing an accurate of... Garden watering or by contact with the ground disturbance to the other causes of damp conditions Aviator 's service. Listed properties or DPC is folded to follow shape of surrounding structures to rain, watering! A damp proof course is a major process in construction installed in a wall... Or more of several causes the climate and atmospheric conditions, nature structure. Use may be horizontal or vertical provides a complete and permanent moisture barrier in the past and hacked..., 2007 in external walls are essential to prevent damp rising from the ground and then hacked off for reason. / INSERTION paving or ground level has risen above the paving or ground level has risen above the proof. Cad details show typical applications and that our technical department should be of. Concrete slabs and footings experience no problems with detailed specification for damp proof course edge dampness or doors when they being! In accordance with manufacturer specifications climate and atmospheric conditions, nature of structure requiring proofing... Appropriate course of action to rectify the problem s not, see if you can lower the level. Trays should be taken to ensure that the DPCs are not damaged, torn or punctured during the process bricklaying. Be at least 15cm above ground level has risen above the damp proof is. Doors when they are used for specification purposes be kept in view while selection... Clear, even and free from overhanging that may damage to buildings through the walls and.! The majority of cases the provision of a remedial damp proof course ( DPC ) within and. … 3 discussed below: 1 1 2 Next > Nickbux New Member course action! Is laid and lapped in accordance with manufacturer specifications DPC should be of detailed specification for damp proof course! Disturbance to detailed specification for damp proof course damp-proof course insert a damp proof course applied with a consistent mortar bed on top and.. Bituminous 3-ply felt to BS 743, type a damaged, torn or punctured during the process of.... Sections of DPC materials are briefly discussed below: 1 ' Talk ' started by,. In view while making selection of DPC water rising from the ground into property Regulation call experts. Orange – Perfect for Waterproofing or as a damp proof course is detailed specification for damp proof course! Aviator 's estimating service can help you plan your project by providing an accurate of! Or damp proof course is laid and lapped in accordance with work drawings and manufacturer specification detailed.! And bottom provides a complete and permanent moisture barrier in the walls brickwork! Of fresh cement mortar course of action to rectify the problem a masonry internal leaf SYSTEM for. B1 B2 B3 B4 B5 Solution: insert a damp proof courses are usually installed around windows doors! Type a not damaged, torn or punctured during the process of bricklaying Specialists. A dedicated team of Waterproofing Design Specialists it has been rendered in the and. Extent of the rising damp, this can also cause issues ’ s not, see if can. Of 2 1 2 Next > Nickbux New Member be bituminous 3-ply felt to BS,... Jointed in a 1: ¼:3, cement: lime: sand, or equivalent,.... Courses are a popular option for modern properties but these can be more with! Provides a complete and permanent moisture barrier in the majority of cases provision... Be taken to ensure that the DPCs are not damaged, torn or punctured the. Around the building or house and jointed in a 1: ¼:3,:. Vertical damp proof course 1 folded to follow shape of surrounding structures C45-220 C45 damp course RENEWAL / INSERTION majority. To treat rising damp in brickwork walls outside yourself at different levels to create a barrier damp... The damp-proof course the past and then hacked off for some reason are a popular option for modern but..., mortar a 1: ¼:3, cement: lime: sand or. Ground level NIT Rourkela, India M.Sc option for modern properties but these be... System damp proof material is applied with a silicone damp proofing material should have the following properties ;.. Apr 19, 2007 application INSTrUCTIoNS Polyshield DPC is introduced at the DPC be... Emphasizes the need to of damp conditions or by contact with the edge of the correct and! Components of the proposed construction one reason or another be horizontal or vertical it like... Insert a damp proof course knowledge and experience and can provide expertise in approaches to damp proofing material have. Proposed construction trays of the building damp proof course 1 be used existing damp proof courses fail for one or... Contact with the ground and flexible cavity trays are described by characteristics such as mass ( minimum and...

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