Fairway Close

The client required a concrete waterproofing system that not only offered optimum protection against flooding and other damp-related issues but was also accompanied by a single-source, 15-year warranty. Sika was able to comfortably satisfy both requests.

The first waterproofing element was contained in the concrete, with Sika® Watertight Concrete added to the concrete mix as an additive. An integral system, Sika® Watertight Concrete is the most widely-used waterproofing solution in the UK due to its inherent buildability, repairability and reduced cost. State-of-the-art Sika admixtures are added to the system to prevent water penetration.

The simple and rapid-apply Type B system is completed with carefully selected water-stops for construction and movement joints to produce a durable, fully-waterproof structure.

To compound the system’s waterproof properties, TK Waterproofing Solutions, the contractors selected by Tilsworth Development, applied Sika® BentoShield® MAX LM to retaining walls and under floor slabs throughout the structure. Comprising a factory prehydrated, needle punched and PE flexible membrane, the fully-bonded, self-healing product is ideal for basements and other below-ground structures that are exposed to aggressive ground conditions and stress, or spaces requiring a completely dry internal environment.

The sealing technology of Sika® BentoShield® MAX LM combines the unique swelling performance of sodium bentonite with high-strength polypropylene geotextiles. It forms a tenacious mechanical bond to freshly-poured concrete to fully-eliminate water tracking. For the basement’s walls, Sika® Drain-850 Geo, a dimpled drainage and protection sheet with filtration layer, provided a smart, high performance waterproof finish.

The basement’s waterproof concrete system was installed in three weeks. With the installation carrying a 15-year warranty the client is reassured the structure’s watertightness will remain as reliable and robust as the day Sika’s dual solution was implemented