System Information And Method Statement

N : 850 64 03Author: H-J. StichDate: Apr. 02 2008System Information andMethod StatementCorporate ConstructionBasement waterproofing with membranesScope:Installation ofSikaplan WP 1100 – 15HL, -20HL, -30HL(Sikaplan - 9.6, -14.6, -24.6)Sikaplan WP 1100 - 15HL2, - 20HL2, 30HL2The information, and, in particular, the recommendations relating to the application and end-use of Sika products, are givenin good faith based on Sika’s current knowledge and experience of the products when properly stored, handled and appliedunder normal conditions. In practice, the differences in materials, substrates and actual site conditions are such that nowarranty in respect of merchantability or of fitness for a particular purpose, nor any liability arising out of any legalrelationship whatsoever, can be inferred either from this information, or from any written recommendations, or from any otheradvice offered. The proprietary rights of third parties must be observed. All orders are accepted subject to our current terms ofsale and delivery. Users must always refer to the most recent issue of the Technical Data Sheet for the product concerned,copies of which will be supplied upon request.Sika Services AG, Speckstrasse 22, CH-8330 Pfäffikon / SwitzerlandTel: 41 (0)58 436 23 61 / Fax: 41 (0)58 436 23 77e-Mail: stich.hans-joerg@ch.sika.comPage 1 of 51

N : 850 64 03Author: H-J. StichDate: Apr. 02 2008Table of Contents:1.Introduction31.11.21.3General informationConstruction requirementsWaterproofing system3452.Products62.12.2Product characteristicsAncillary .9General information for installationSubstrate preparationProtective layerGeneral membrane installation recommendationsWaterproofing termination detailsFixings on vertical areasWaterproofing details in horizontal and vertical areasInstallation of waterproofing membranesCompartment waterproofing with waterstops89111113151619204.Welding methods235.Quality control246.Cleaning and inspection of completed waterproofing267.Protection of completed waterproofing268.Proposal for bills of quantities289.Standard details41Sika Services AG, Speckstrasse 22, CH-8330 Pfäffikon / SwitzerlandTel: 41 (0)58 436 23 61 / Fax: 41 (0)58 436 23 77e-Mail: stich.hans-joerg@ch.sika.comPage 2 of 51

N : 850 64 03Author: H-J. StichDate: Apr. 02 20081. INTRODUCTION1.1 General background informationBuilding structures with basements below ground usually need to be watertight.Waterproofing works dependant on the basement’s structure are required to preventleaks into the structure and to protect the structure against the harmful influences ofaggressive ground- or seawater.Highly flexible single layer, or if required double layer Sikaplan WP waterproofingmembranes can protect a structure against water from damp soil contact, percolatingwater and groundwater under hydrostatic pressure.In situations with leaking waterproofing membranes caused by mechanical damage tothe membranes, whether a loose laid and single, or double layer systems, infiltratingwater might underflow and spread uncontrolled between the installed membrane andthe structure.A compartment system with waterstops and specially welded single or double layermembranes, combined with injectable hoses provides the possibility of control andrepair by injection if required during service life.Additional advantages are fast installation procedures, the high crack bridging ability ofthe installed membranes, plus minimal requirements for substrate preparation.This Method Statement describes the installation procedure and details with theSikaplan WP waterproofing membranes based on plasticised PVC.Limitations of membrane installations:A successful waterproofing system requires detailed design and specification bythe engineer prior to the membrane installation works being carried out onsite.The structure must be designed and built in such a way that the Sikaplan WPwaterproofing membrane system can adequately fulfil its function during its longservice life.Installation procedures must only be performed by skilled and experiencedmembrane waterproofing contractors. The site personnel must be trained in correctlywelding of the Sikaplan WP sheet membranes.Sika Services AG, Speckstrasse 22, CH-8330 Pfäffikon / SwitzerlandTel: 41 (0)58 436 23 61 / Fax: 41 (0)58 436 23 77e-Mail: stich.hans-joerg@ch.sika.comPage 3 of 51

N : 850 64 03Author: H-J. StichDate: Apr. 02 20081.2 Construction requirementsThe main criteria for the correct design and execution of the Sikaplan WP flexiblesheet membrane waterproofing system against groundwater ingress in undergroundstructures are: type and purpose of structure waterproofing of structures in open cut excavation, or shafting between secant pileor diaphragm walls circumference of the waterproofing (the level of waterproofing and its terminations) type and design of the retaining walls piled foundations and the pile cap location lowering of groundwater level during construction (sump pumping methods) condition of the substrate to be waterproofed thermal insulation details and requirements dimensions of the structure (length, width, depth) groundwater levels (max., min., average, immersion depth of structure) condition of groundwater (aggressive water, salt water, polluted water) expansion joint details and design construction phases construction/day work jointing of structure(construction schedule) requirements for single, or double-layer waterproofing system with vacuum controlAll elements protruding from or through the waterproofing membrane and cast intothe concrete, i.e. well shafts, service pipes, anchors, etc. must be made ofcorrosion-free steel quality (i.e. stainless V2A or V4A steel), or other non corrodingmaterials. The elements must be designed with flanges in order to allow watertightsealing of the membranes around them.In order to avoid any kind of damage to the installed waterproofing membrane and toensure their performance the following requirements from the substrate must be met: the structure must be designed to minimise movement due to temperature,settlement and concrete shrinkage contraction etc. reinforcement bars in the concrete must be min. 30mm below surface all steel elements must be stainless, or anticorrosive materials (i.e. cast iron,V2A, V4A steel quality, aluminium) the surface of the substrate being waterproofed must be smooth to avoidpuncturing the membrane under the future influence of hydrostatic pressureSika Services AG, Speckstrasse 22, CH-8330 Pfäffikon / SwitzerlandTel: 41 (0)58 436 23 61 / Fax: 41 (0)58 436 23 77e-Mail: stich.hans-joerg@ch.sika.comPage 4 of 51

N : 850 64 03Author: H-J. StichDate: Apr. 02 20081.3 Waterproofing systemThe installation procedure for waterproofing membranes depends on the: chosen excavation system i.e. open with free access to external walls, orinternally with retaining walls project design damp soil contact, percolating water, or water under hydraulic pressure immersion depth below groundwater level chosen membrane type and its fixing methods chosen waterproofing system, i.e. drainage system, waterstop system, active controlsystemDrainage systemWaterstop systemActive control systemWaterproofing against damp soil contact andpercolating water using with single layer membraneswithout compartment. This system is not resistantagainst water under hydrostatic pressure.Waterproofing against water under hydrostaticpressure, combining single layer membranes andWaterstops – forming compartments (the mostcommon standard waterproofing solution).Waterproofing against water under hydrostaticpressure, combined with double layer membranesand waterstops – compartments (allows highestsecurity of water tightness – continual monitoringand vacuum testing).The following installation instructions are divided into single operations, applicableaccording to each kind of project. The operational sequences must then be definedaccording to the project design and the specification requirements.Membrane installation sequences:Single layer or double layer membrane systemInstallation sequence of theOpen with free access to external walls:membrane is in two phases: without retaining walls1. lining below the basement slab with retaining walls cast in place concrete structures(apart from the structure)(slab, walls, roof)2. lining of walls and roofInternally without access to externalInstallation sequences of membrane inwalls:one, or two phases: diaphragm walls lining below basement and at driven or cast pile wallsretaining walls cast in place basement, wall- androof structureSika Services AG, Speckstrasse 22, CH-8330 Pfäffikon / SwitzerlandTel: 41 (0)58 436 23 61 / Fax: 41 (0)58 436 23 77e-Mail: stich.hans-joerg@ch.sika.comPage 5 of 51

N : 850 64 03Author: H-J. StichDate: Apr. 02 2008Subject to other local requirements, the specification of the membrane thickness isaccording to estimated immersion depth and consequent potential water pressure.membrane thickness1.5 mmMoisture and water ingress(to be combined with a drainage system)Hydrostatic pressure 0m - 10mHydrostatic pressure 10m - 20mHydrostatic pressure exceeding 20m1.5 mm2.0 mm3.0 mm2. PRODUCTS2.1 Product characteristicsSikaplan WP 1100 -15HLSikaplan WP 1100 -30HL(with signal layer 0.6mm)(Sikaplan 9.6)Sikaplan WP 1100 -20HLStandardproductSikaplan WP 1100 -15HL2Sikaplan WP 1100 -20HL2Sikaplan WP 1100 -30HL2Standardproduct(with signal layer0.2 mm, available oninquiry)ColoursSpecials(Sikaplan 14.6)(Sikaplan 24.6)top layer: yellow / reverse layer: dark greySikaplan WP 1100 -20H transparent (Trocal T 2.00mm)(transparent acc. toFrench Standard, onrequest)MaterialUsePVC-p membrane, homogeneous, not bitumen resistantWaterproofing of all types of structures, situated below groundagainst groundwater ingressMembranethicknessand roll sizesaccording to the respective product data sheetsSuitable against ageing or weathering during installation worksagainst aggressive influences occurring naturally in groundwateragainst salt wateragainst accidental puncturingagainst algae and micro-organismsagainst hydrostatic pressureto be resistant against root penetrationsto remain flexible at low temperaturesSika Services AG, Speckstrasse 22, CH-8330 Pfäffikon / SwitzerlandTel: 41 (0)58 436 23 61 / Fax: 41 (0)58 436 23 77e-Mail: stich.hans-joerg@ch.sika.comPage 6 of 51