African Design Magazine March 2016 | Page 68

Feature Waterproofing NAMIBIA When a Russian billionaire with a passion for nature and wildlife recently purchased almost 30 000ha of land in Namibia, it resulted in the construction of the luxury Marula Game Ranch. It was here, 80km southeast of Windhoek in the Khomas region, that RBL Architects specified several of Sika’s high performance waterproofing products for the lodge’s one million-litre swimming pool. N MC Construction Namibia was awarded the contract to apply Sika Waterbars, SikaSwell S-2, SikaPrimer-3N and Sikasil-Pool. The waterproofing process commenced with the application of SikaSwell S-2 to the 60m of construction joints on the floor of the pool. Highly economical and easy to apply, SikaSwell S-2 is a one-part polyurethane waterstop that swells in contact with water. It provides permanent water resistance and its optimised expansion rate prevents damage to fresh concrete during curing. Sika Waterbar Type O-20 was used as a centrally placed waterbar in all the expansion joints. Manufactured from virgin thermoplastic PVC for easy, on-site welding, internationally tested Sika-Waterbars are used to seal construction and expansion joints in all water retaining structures. They are designed to withstand high water pressure and are supp YY[