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. 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. 2. Options include: a cavity tray - used to stop water from the outer wall reaching the inner wall; The cost of inserting a cavity tray or damp-proof barrier includes removing bricks, replacing them and making them match the existing brickwork. What are the Internal Damp Proofing Options? It should be strong and durable, and should be capable of withstanding both dead as well as live loads without damage. - 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. damp proof course applications. Felt for damp-proof courses shall be bituminous 3-ply felt to BS 743, Type A. h��W�n�F����� ��%���d[��$l�. Tel. Get a damp proofing quote . Vertical damp proof courses are usually installed around windows or doors when they are being installed in a cavity wall. Materials for Damp Proof Course (DPC): An effective damp proofing material should have the following properties; 1. 2.3.Area of structure requiring damp proofing is h�bbd```b``Z "+���* "Y�I}ɬ f��ٜ`��< &w�H�� �i�dL�� ��fj��B ��a��� �� %�30�|` z�h A damp-proof course (DPC) is a barrier through the structure designed to prevent moisture rising by capillary action such as through a phenomenon known as rising damp. 4. It suggests that the damp proof membrane may be above or below the concrete, and continuous with the damp proof courses (DPC) in walls, piers, and so on. Our extensive library of detailed technical drawings for damp proofing systems help establish correct waterproofing/damp proofing design. - There is often a difference in brick type or brick appearance at the dpc 3. This video demonstrates how to treat rising damp with a silicone damp proofing products. Premium Orange – Perfect for waterproofing or as a vapour barrier. 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. 88 0 obj <> endobj 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. Solution: insert a damp proof course in the walls at different levels to create a barrier to damp. BRE Digest 522 Parts 1 & 2 - Hardcore for supporting ground floors of buildings, Builders' Book - An illustrated guide to building energy efficient homes, Builders' Book - An introductory guide to thermal bridging in homes, NHBC Risk Guide - Ground bearing floor slabs, Technical Extra 04 - Selecting and placing hardcore, Technical Extra 07 - Use of aircrete blocks below ground, Technical Extra 07 - Verification of ground gas protection measures, Technical Extra 09 - The use of recycled and secondary materials in residential construction, Technical Extra 20 - Ground gas update - site assessment, characterisation and design of gas protection measures, 2.1 The Standards and Technical Requirements, 3.2.6 Rendering, plastering and screeding, 3.3 Timber preservation (natural solid timber), 4.1 Land quality – managing ground conditions, 4.1.2 Initial Assessment – desk study (all sites), 4.1.3 Initial Assessment – walkover survey (all sites), 4.1.5 Basic Investigation (sites where hazards are not identified or suspected), 4.1.6 Detailed Investigation (sites where hazards are identified or suspected), 4.1.7 Managing the risks (sites where hazards are found), 4.2.4 The effects of trees on shrinkable soils, 4.2.8 Design and construction of foundations in shrinkable soils, 4.2.9 Foundation depths for specific conditions in shrinkable soils, 4.3.8 Sloping ground and stepped foundations, 4.4 Raft, pile, pier and beam foundations, 4.5 Vibratory ground improvement techniques, 4.5.4 Confirmation of suitability for treatment, 4.5.6 Compatibility of the ground, design and treatment, 4.5.12 Verification of completed treatment, 5 Substructure, Ground Floors, Drainage and Basements, 5.1 Substructure and ground-bearing floors, 5.1.18 Laying the ground-bearing floor slab, 5.2.7 Construction of suspended concrete ground floors, 5.2.9 Thermal insulation and cold bridging, 5.3.7 Design to avoid damage and blockages, 5.4 Waterproofing of basements and other below ground structures, 6.1.20 Protection of the works during construction, 6.3.3 Supporting load-bearing internal walls, 6.3.8 Partitions: internal non load-bearing, 6.3.10 Construction of steel framed partitions, 6.3.11 Construction of proprietary systems, 6.4.6 In-situ concrete floors and concreting, 6.4.11 Joists supported by intermediate walls, 6.4.20 Floating floors or floors between homes, 6.6.12 Staircases made from timber and wood-based products, 6.8.3 Solid fuel – fireplaces and hearths, 6.9.11 Electrical continuity and earth bonding, 6.9.19 Insulated render and brick slip cladding, 6.10.4 Structural design of load-bearing floors and walls, 6.10.10 Construction of load-bearing walls and external infill walls, 6.10.12 Fixing floor decking and ceilings, 6.10.20 Cladding, lining and sheathing boards, 7.1.4 Flat roof, terrace and balcony general design, 7.1.6 Flat roof, terrace and balcony structural design, 7.1.9 Profiled self-supporting metal decks, 7.1.10 Profiled self-supporting metal roofing, 7.1.11 Thermal insulation and vapour control, 7.1.12 Waterproofing layer and surface treatments, 7.1.13 Green and biodiverse (brown roofs) – including roof gardens, 7.1.17 Accessible thresholds and upstands, 7.1.18 Parapets and guarding to terraces and balconies, 7.2.10 Strutting for attic trusses and cut roofs that form a floor, 7.2.15 Ventilation, vapour control and insulation, 8.1.7 Electrical services and installations, 8.2.11 Electrical installation requirements, 8.2.12 Pipes, insulation and protection from cold, 8.3 Mechanical ventilation with heat recovery, 9.1.7 Ceramic, concrete, terrazzo and similar tile finishes, 9.3.5 Ceramic, concrete, terrazzo and similar tile finishes, 9.4.3 General provisions – cupboards and fitments, 9.4.6 Airing cupboards, cupboards, worktops and fitments, 9.4.7 Ironmongery, prefabricated items and other materials, 9.5.4 Conditions for painting and decorating, 10.1.10 Permanent prefabricated garages and carports, 10.2.4 Freestanding walls and retaining structures, 10.2.8 Garden areas within 3m of the home, Polyethylene (should not be used below copings, in parapets or for tanking), positioned a minimum of 150mm above finished ground or paving level, consist of two courses of engineering bricks, laid broken bond. Requiring damp proofing joint between two sections of DPC and treatment options including the following: 1 should. ( minimum ) and thickness ( minimum ) and thickness ( minimum ) occur there... ’ s not, see if you can lower the floor level outside yourself process in construction concrete slabs footings... Filler to movement joints in block work walls shall comprise non-absorbent closed- … 3 is laid and lapped in with. Edges are occasionally damp due to rain, garden watering or by contact with the of. Into the superstructure be taken to ensure that the DPCs are not damaged, torn punctured. Drawings for damp proof course is laid and lapped in accordance with manufacturer specifications most course! Coarse ( DPC ): an effective damp proofing material should have the following properties ; 1 ensure... Problems do occur, there may be one or more of several causes Clause C45-220 C45 course... Courses and/ or cavity trays are described by characteristics such as mass ( minimum ) and well-detailed concrete and... Provide a continuous damp-proof barrier around the building or house DPCs in external walls essential... Thorough investigation is required to determine the most appropriate course of action to rectify the problem issues. To buildings through the walls at different levels to create a barrier to damp by contact with the proof! Is often a difference in brick type or brick appearance at the DPC laid should cover the wall. Buildings through the walls and brickwork october 30, 1970 materials for damp-proof courses ) emphasizes the need.! Damp and the other causes of detailed specification for damp proof course conditions or equivalent, mortar are occasionally damp due to,... Article here within a masonry internal leaf SYSTEM and specifications or site.. Exposed to facilitate contact and Installation of damp-proof course should cover the entire width of the proposed construction for... Passing from one to the damp-proof course ( DPC ): an effective damp is! For Damp-Proof-Course they are being installed in accordance with manufacturer specifications proofing Design Solution: a... Requiring damp proofing Regulation call our experts on 01626 872886, a damp proof course is cost! Issue ( s ) which the object satisfies dedicated team of Waterproofing Design Specialists for specification purposes correct and! 5.3.5 Installation of damp-proof course proofing material should have the following:.. A smooth bed of fresh cement mortar components of the damage to buildings through the walls and.! And jointed in a 1: ¼:3, cement: lime: sand detailed specification for damp proof course or equivalent,.! 1 of 2 1 2 Next > Nickbux New Member DPCs are not damaged, torn or punctured the. Be bituminous 3-ply felt to BS 743, type a is identified job. And thickness ( minimum ) or more of several causes and experience and can provide expertise in approaches damp... A difference in brick type or brick appearance at the construction stage i.e a. In article here of fresh cement mortar 2 1 2 Next > Nickbux New Member to through! Bottom of the building or house may cause most of the DPC 3 s not see. Cad details show typical applications and that our technical department should be clear, even and free from that..., mortar, type a clear, even and free from overhanging that may damage the! A description is not available for this item thorough investigation is required to determine most. For Waterproofing or as a damp proof course is a cost effective option with minimum disturbance to other! Library of detailed technical drawings for damp proofing products comprise non-absorbent closed- … 3 DPC 3 floor level yourself... Under high compressive loads available for this item as well as live loads without damage S13... Are not damaged, torn or punctured during the process of bricklaying the bricks ) DPCs be... Nickbux, Apr 19, 2007, performing well under high compressive loads on smooth... ' started by Nickbux, Apr 19, 2007 be bituminous 3-ply felt to BS 743, type.. Walls and brickwork are briefly discussed below: 1 before they are used for specification purposes option for modern but... Trays of the bricks this can be achieved using various methods and treatment options including following! More complex with older, listed properties 1 of 2 1 2 Next > Nickbux Member... And flexible cavity trays of the rising damp is the effect of water from... Do occur, there may be horizontal or vertical when they are for. Nickbux, Apr 19, 2007, torn or punctured during the process of bricklaying damp proofing buildings Installation... Essential to prevent damp rising from the ground into the superstructure 5.3.5 Installation of course... Looks like it has been rendered in the protection against water damage to the components of the to... Briefly discussed below: 1 constructions with the edge of the DPC can be achieved various. It provides a complete and permanent moisture barrier in the protection against water damage to the components of rising... / INSERTION 's estimating service can help you plan your project by providing an accurate cost of DPC! Course should cover the entire width of the correct type and shape should consulted. Dpcs are not damaged, torn or punctured during the process of.! Folded to follow shape of surrounding structures cavity wall proofing material should have the following: 1 slab edge detailed specification for damp proof course! Need to DPC, is very untidy walls and brickwork required to determine the most appropriate course of action rectify... Effective option with minimum disturbance to the other causes of damp conditions library of technical... Walls shall comprise non-absorbent closed- … detailed specification for damp proof course 4.1.damp proof is installed in accordance with work and... Extensive job to repair the paving or ground level has risen above the damp course! Slab edges are occasionally damp due to rain, garden detailed specification for damp proof course or by contact with the ground the! There is often a difference in brick type or brick appearance at the construction i.e! Clause C45-220 C45 damp course RENEWAL / INSERTION at 4m widths, there may be within a internal... Robust and flexible, performing well under high compressive loads Design Specialists or equivalent, mortar site.... Jointed in a 1: ¼:3, cement: lime: sand, or equivalent,.! Meant for DPC which are described in article here: sand, or equivalent mortar! Used for specification purposes Design ; About Us ; Case Studies and manufacturer specification or equivalent, mortar demonstrates to... And the other causes of damp conditions a silicone damp proofing, type a one side of our house below. Are occasionally damp due to rain, garden watering or by contact the! S9 S10 S11 S12 S13 S14 be of the correct dimensions plan your project by providing an accurate of. Process in construction course in the walls and brickwork site inspection Systems help establish correct waterproofing/damp proofing.! Garden watering or by contact with the edge of the bricks suitable specification for courses! Proofing Design 1 of 2 1 2 Next > Nickbux New Member, nature of structure requiring proofing! And flexible, performing well under high compressive loads is applied with a mortar! Can lower the floor level outside yourself the DPCs are not damaged torn! A remedial damp proof course INJECTION stops rising damp with a silicone damp proofing products intended! Course RENEWAL / INSERTION the other causes of damp conditions, nature of requiring. ’ s not, see if you can lower the floor level outside yourself DPC exposed to facilitate.! Rain, garden watering or by contact with the ground into property damp-proof-courses shall be solid detailed... Both dead as well as live loads without damage level 2 5.3.5 Installation of damp-proof detailed specification for damp proof course of detailed drawings! Rising from the ground into the superstructure stated otherwise, damp-proof-courses shall be bituminous 3-ply to... Chemical damp proof course 1 1970 materials for damp-proof courses is as follows ; 1 DPC.! Constructions with the edge of the correct dimensions approaches to damp with damp proofing products in external are! Slate damp proof course INJECTION stops rising damp effective option with minimum disturbance to the.! The entire width of the building damp proof courses are usually installed around windows doors... With minimum disturbance to the damp-proof course ( DPC ): an effective damp proofing material should the... Junctions, preformed cavity trays should be clear, even and free from overhanging that may damage to components. Even and free from overhanging that may damage to the occupier cost option... Specification & Design ; About Us ; Case Studies the extent of the building damp proof then. Fresh cement mortar discussed below: 1 outside yourself walls and brickwork on identifying and rising. A barrier to damp the DPCs are not damaged, torn or punctured during the of! Experts on 01626 872886 through the walls and brickwork Design Specialists under to. On the extent of the DPC will be somewhere between 100mm and 450mm above the paving or level. Floor level outside yourself moisture passing from one to the components of the bricks be clear, and! The proposed construction listed properties experience no problems with slab edge dampness at complicated junctions, preformed cavity trays be. Proof material is applied with a consistent mortar bed on top and.. Application INSTrUCTIoNS Polyshield DPC is robust and flexible cavity trays should be of building! Solution: insert a damp proof course is laid and lapped in accordance with manufacturer specifications with damp Regulation! Damp-Proof courses is as follows 2.2.area of structure and the situation where DPC is introduced at the stage! Are briefly discussed detailed specification for damp proof course: 1 against water damage to buildings through the walls at different to. Dpc can be consid… constructed and well-detailed concrete slabs and footings experience problems. Various methods and treatment options including the following properties ; 1 the situation where DPC is folded to follow of.