The choice of a waterproofing membrane
is a critical construction decision for any building. Waterproofing is the key to preventing structural damage, eliminating ongoing remediation costs and providing many years of peace of mind.
Whether you are choosing a PVC, EPDM or TPO product the key is choosing the best one for your project. There are a number of factors to consider when evaluating each type of membrane for your application including:
The durability of a roofing system is the most important aspect for sustainability. This is particularly true when considering a waterproofing membrane, since it will need to withstand the uplift forces of a roof.
The elasticity of a waterproofing membrane is also an important factor. The more elongation (the ability to withstand tearing or stretching without ripping) the better it will perform.
A high elongation membrane like Wolfin IB will allow the structure to move without tearing or splitting the membrane and therefore maintaining waterproof integrity.
Several different types of PVC waterproofing membranes have varying levels of strength and elasticity. Ideally, you want a product that can withstand normal building movement such as ponding and positive falls to outlets with minimal damage.
Having NSF/ANSI 347 certification is another indication of quality, as it means the product has been tested and proven to meet the most demanding durability criteria. The certification requires two crucial components – a documented installer-training program and a post-inspection protocol that is actively practiced by the company that has earned it.