Critical evaluation on waterproofing practices in the industry

Abstract

Waterproofing is the process of rendering an object or surface resistant to water. Importance of waterproofing in construction cannot be overstated. It is essential for durability, hygiene and also for a pleasant appearance. Water tanks, reservoirs, ponds, planter boxes, sewerage plants, water treatment plants, swimming pools, basements, roofs, bathrooms, kitchens, floors, balconies, tunnels, silos, parking decks, bridge decks, ducts, parapet walls and foundations all require waterproofing to last longer and to secure its aesthetic appearance. Also, there are several factors to be taken into consideration when selecting the most suitable waterproofing system for the required structure. The selected waterproofing system should be non-toxic, economical, permanent, easily applied, highly resistant to water, stable at a range of temperatures, compatible, resistant to bacterial & other growth and also provide a good texture. There is a proper procedure to be followed before applying any waterproofing system on the surface. First of all, inspect the area and get accurate information about the site. Then measure the right area and calculate the correct material requirements. Next prepare the substrate effectively. Weak areas such as cracks, honeycombs and joints, etc. have to be repaired. Then seal around the pipes/protrusions. Lay a sloping screed (if required) and fillets at right angled edges. Now apply the waterproofing system strictly conforming to the manufacturer’s specifications. Cure the waterproofing system as specified. Various reasons may lead to failures in waterproofing. Some of them are application of an unsuitable waterproofing system, using incorrect application tools, incorrect mixing proportions, poor storage of waterproofing materials, poor substrate or surface preparation, bad maintenance practices, application under direct sunlight or during rain and failure to protect application from other sources.