5 Considerations When Evaluating Spray-Applied Waterproofing Solutions

5 February 2020
 Categories: , Blog

Today, many contractors are using spray-applied waterproofing, which is essential in accelerating project timelines. The latest waterproofing solutions require only one spray coat without the use of reinforcements. After application, the liquid waterproofing cures faster and forms a solid membrane, which significantly reduces installation time. Besides the time factor, here are five vital factors to consider when purchasing your spray-applied waterproofing products. 


You require a waterproofing solution comprising of Shore A hardness (endurance of a material to permanent indentation), high tensile strength and high elongation. Tensile strength defines the force necessary to cause full separation of elements linearly. Elongation is essential for waterproofing fixtures like roofs, since the membrane contracts and expands with temperature changes. Therefore, you'll require a waterproofing solution with exceptional elongation to prevent cracking and tearing.

Ability to Bond Seamlessly

In the process of bonding to a substrate, there is a need to ensure the product bonds tightly with the type of material you intend to waterproof. Hence, fully bonded material inhibits water from infiltrating beneath the membrane. In turn, this promotes the material's lifespan and functionality. 

Time Taken to Cure

Different spray-applied waterproofing solutions have different curing times. The faster the curing time, the quicker you'll complete the work. Current technology has allowed for the manufacture of waterproofing solutions that only take seconds to cure completely. Therefore, they are superior solutions compared to hand-applied alternatives that take days to cure. As such, these alternatives are not appropriate as longer cure durations make them susceptible to elements.

Their Track Record

Liquid waterproofing membranes have been around for decades now. Before buying, confirm that the manufacturer has a solid history with these types of products. Besides, confirm that they hold proper licenses and certifications. Ask for some recommendations and whether they can provide case studies.

UV Stability

For many liquid-applied waterproofing solutions, their membranes may lose a certain amount of physical strength when exposed to the sun. This exposure can cause them to become fragile and end up cracking. Some sheet-applied solutions can endure UV exposure, but since they are black, they absorb more heat and scorch the roof. In turn, this compromises the waterproofing membrane and roof colour and depreciates your roof's energy efficiency.

In a nutshell, it's essential to consider heat absorption, aesthetics and roof activity you require protecting. It is crucial to ask your manufacturer if the product requires topcoat protection and how fast you should apply it. Additionally, ask for available colours and if the product can retain the colour after exposure to the sun.

To learn more, contact a waterproofing contractor.