{"title":"Waterstops","description":"\u003cp\u003eA waterstop is a physical barrier installed within a concrete construction joint to prevent water migrating through the joint under hydrostatic pressure. Construction joints are a necessary part of reinforced concrete structures, occurring wherever a concrete pour is interrupted and resumed. They represent a potential weak point in an otherwise continuous structure, and without a correctly specified and installed waterstop, water can penetrate through these joints regardless of how well the surrounding concrete has been placed. Waterstops are used in below-ground reinforced concrete construction where joints are subject to hydrostatic pressures. They form part of the structural waterproofing system rather than a standalone solution, and their specification should be considered alongside the overall waterproofing strategy for the structure in accordance with BS 8102:2009.\u003c\/p\u003e\n\u003ch2\u003eHydrophilic Waterstops and How They Work\u003c\/h2\u003e\n\u003cp\u003eHydrophilic waterstops are an active type of waterstop, distinct from passive PVC or rubber waterbars that rely on physical embedment alone to resist water movement. Sodium bentonite hydrophilic waterstops work by swelling on contact with water, forming an impermeable barrier within the concrete joint that creates a permanent pressure seal, filling voids and cracks within the concrete and eliminating water migration over or along the waterstop.\u003c\/p\u003e\n\u003cp\u003eThis active swelling mechanism offers a practical installation advantage over passive PVC waterbar systems. Because the hydrophilic strip replaces PVC or rubber profiles, there is no requirement for fabricated junction pieces or site seam welding, simplifying installation and reducing the risk of errors at changes of direction and junctions. This type of waterstop has been independently tested to resist over 70m of hydrostatic water pressure under both continuous immersion and wet\/dry cycling conditions. To function correctly a hydrophilic waterstop must be fully encapsulated within concrete with adequate cover to all sides, allowing the swelling mechanism to develop into a confined pressure seal.\u003c\/p\u003e\n\u003ch2\u003eWhere Are Waterstops Used?\u003c\/h2\u003e\n\u003cp\u003eWaterstops are used in the construction joints of reinforced concrete structures where water exclusion is required. In accordance with BS 8102:2009, the product is suitable for both Type A and Type B waterproofing structures, where it forms part of the designed joint detail within the reinforced concrete construction. Applications include vertical and horizontal non-moving construction joints, joints between new and existing concrete, and puddle flange installations around cast-in through-wall and through-slab service penetrations. At penetrations, the waterstop is installed around the service prior to concrete being placed, providing a sealed junction between the penetration and the surrounding structure.\u003c\/p\u003e\n\u003cp\u003eThe product is designed for non-moving construction joints only. It is not designed or intended to function as an expansion joint sealant and must not be specified for joints where structural movement is anticipated.\u003c\/p\u003e\n\u003ch3\u003eInstalling a Waterstop in Concrete\u003c\/h3\u003e\n\u003cp\u003eConcrete joint surfaces must be clean and free of standing water before installation. Loose or flaking concrete and laitance should be removed from the joint face, but no rebates or chases need to be formed in the concrete surface. The waterstop is not a self-adhesive product. It is secured to the concrete surface using a mesh system that holds the waterstop in continuous contact with the substrate along its full length, including at irregular surfaces such as old-to-new slab junctions. Junctions and changes of direction are formed as butt joints. Waterstops must not be stretched to fit, and overlaps in the material must not be provided.\u003c\/p\u003e\n\u003cp\u003eThe waterstop must not be pre-hydrated before concrete is placed. If the product exhibits significant swelling before it is confined within the joint, for example from contact with rainwater on site, it must be replaced with new material before concreting proceeds. Once correctly installed and encapsulated, the product is designed to provide an effective barrier to water transmission for the life of the structure.\u003c\/p\u003e\n\u003ch3\u003eChoosing the Right Waterstop\u003c\/h3\u003e\n\u003cp\u003eCorrect waterstop specification begins with the waterproofing classification of the structure and the nature of the joints being detailed. For reinforced concrete structures designed to BS 8102:2009, the grade of water exclusion required and the structural waterproofing strategy determine whether a waterstop is required and what type is appropriate for each joint. Sodium bentonite hydrophilic waterstops are appropriate for non-moving construction joints in reinforced concrete within both Type A and Type B waterproofing strategies. They are not appropriate where joint movement is anticipated, and expansion joints require a different product and a different detail entirely. A hydrophilic waterstop must be fully encapsulated within concrete and is not suitable for surface-applied or exposed applications.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose Construction Supplies UK for Waterstops?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eHydrophilic waterstop for reinforced concrete construction joints:\u003c\/strong\u003e We stock BBA-certified sodium bentonite hydrophilic waterstop from RIW, suitable for non-moving construction joints in Type A and Type B waterproofing structures in accordance with BS 8102:2009.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTrusted industry brands:\u003c\/strong\u003e Shop waterstop from RIW, certified to BBA Certificate No. 02\/3953 for use as a waterbar in reinforced concrete construction joints.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCompetitive trade prices:\u003c\/strong\u003e Waterstops supplied at competitive trade prices with no minimum order value.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFast UK-wide delivery:\u003c\/strong\u003e Reliable nationwide delivery with free shipping available on orders over £300.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eExpert support when you need it:\u003c\/strong\u003e Our team can help with product selection and application guidance for your project. Get in touch @ \u003cstrong\u003esales@constructionsuppliesuk.co.uk\u003c\/strong\u003e or call us on \u003cstrong\u003e03300 55 32 02.\u003c\/strong\u003e\u003c\/p\u003e","products":[{"product_id":"riw-waterstop","title":"RIW Waterstop","description":"\u003cp\u003eRIW Waterstop is a simple yet highly effective solution for waterproofing construction joints in reinforced concrete structures. Rather than relying on a passive mechanical barrier, the sodium bentonite core swells on contact with water, generating a self-sealing pressure seal that tightens under hydrostatic load. This active swelling mechanism maintains an impermeable barrier throughout the life of the structure and accommodates minor joint movement without compromising performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBenefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSwells on contact with water\u003c\/li\u003e\n\u003cli\u003eResists 70m head of hydrostatic water pressure\u003c\/li\u003e\n\u003cli\u003eSimple and quick to install\u003c\/li\u003e\n\u003cli\u003eReplaces passive PVC\/rubber waterbars — no special pieces or seam welding required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eGood to know\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eUsed as part of the RIW Structureseal sodium bentonite waterproofing system\u003c\/li\u003e\n\u003cli\u003eRIW Waterstop is not designed or intended to function as an expansion joint sealant.\u003c\/li\u003e\n\u003cli\u003eFor construction joints within reinforced concrete basements and sub-structures\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RIW","offers":[{"title":"Default Title","offer_id":57127688569164,"sku":"BM05723","price":91.35,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/files\/riw-riw-waterstop-1232467470.jpg?v=1776259955"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1046\/6715\/2716\/collections\/riw-riw-waterstop-1232467470.jpg?v=1780046789","url":"https:\/\/www.constructionsuppliesuk.co.uk\/collections\/waterstops.oembed","provider":"Construction Supplies UK","version":"1.0","type":"link"}