Geo-Seal® Retro Fit of High Performance Gas Vapour Barrier

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  • 7/29/2019 Geo-Seal Retro Fit of High Performance Gas Vapour Barrier

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    RichardBrewer/ConstructionDirector/ReadieConstructionLtd./Unit15FalconBusinessCentre/AshtonRoad/

    Romford/EssexRM38UR/Tel.+44(0)1708332800/www.readieconstruction.co.uk

    GarethLeonard/DistrictManager/RegenesisLtd./TheTramshed/BeehiveYard/WalcotStreet/BathBA15BB/Tel.

    +44(0)1225731446/www.regenesis.com

    PlacingtheBONDLayer

    FinishedSurfaceshowingBONDLayer

    SealingaroundSteelStanchion

    CASESTUDY:RetrofitofHighPerformanceGasVapourBarrier

    FormerWarehouseRedevelopmentLondonU.K.

    A2,000m2floorspaceofavacantbuildinginLondon,formerlyusedforwarehousingandstorage,wastoberedeveloped

    intoanumberofstartupbusinesspremises.Duetothepotentialforingressofharmfulvolatilesfromcontaminatedland

    belowthebuilding (highbenzenesoilconcentrations fromahistoricpaintworks

    onsite)ahighperformancegasvapourbarrierwasrequiredtoprovideprotection

    tothefuturetenantsofthebuilding.GeoSealwaschosenowingtoitsphysical

    robustnessagainstpostapplicationdamage, seamless construction andeaseof

    sealing around 111 steel stanchions and retrofit terminations. GeoSeal

    comprisestwo integratedHDPE layersbondedtogetherwithacontinuousspray

    applied latex copolymer asphalt core layer thereby providing three layers of

    protectionagainst

    vapour

    intrusion

    plus

    resistance

    to

    damage

    from

    follow

    on

    constructionactivities.A fulldesign,productsupplyand installationservicewas

    providedfortheGeoSealsystem,includinga20yearwarranty.

    Duetothenatureofthebuildingandphasesofconstruction,GeoSealwas laid

    bothaboveandbelowtheconcreteslablevelwithseveraldifferentterminations

    required,including:

    Sealingtoexistingwalls Sealingaroundstructuralsteelsupports111intotal Sealingaroundrebarandserviceductpenetrations Sealingaroundaliftshaft

    Installing GeoSeal at the site eliminated the need to break up the slab and

    undertakesoilremediationworks.

    AbouttheGeoSealGasVapourBarrier

    GeoSeal isthe idealblendofchemicallyresistantHDPEsheetandspray

    appliedmembrane technologies, resulting, in themost appropriate gas

    vaporbarriertechnologyusedtoeliminatevaporintrusiononBrownfields

    or environmentally impaired sites. GeoSeal is a chemically resistant

    materialplacedbetweenthesubgradeandbuildingfoundationtosealoff

    exposurepathwaysandstopvapor intrusion intobuildings. Byselecting

    GeoSeal, developers can ensure a healthy indoor environment while

    reducingthecostofsiteremediationandexpeditingsiteconstruction.