When designers started to plan what would become North America’s largest man-made waterfalls (World Trade Center Memorial -WTC) in New York City, they faced a number of challenges. One of the biggest concerns was how to contain vast quantities of water while preventing infiltration into underground structures.
Waterproofing membranes, waterproofing coatings, and waterproof linings are terms that can be applied to a wide range of products. They can be cold-applied liquid products, hot-applied products, peel-and-stick membranes or thermoplastic linings to name a few. All these products provide a good barrier to water when used under proper circumstances. So, why do so many installations leak?
Left image: reinforcing fabric installation on a roof
The presence of leaks can almost always be attributed to poor attention to the waterproofing details, including:
Experienced contractors know that documenting the activities of a coating, lining or waterproofing application can be the key to a successful job. The purpose of documentation is twofold: