Apart from protecting the roof from weather-related damage, roof coatings also contribute to energy efficiency by reflecting sunlight. However, both of these benefits are only possible if the coatings are properly applied. Here are some of the application problems that may render a roof coating ineffective:
Poor Surface Preparation
If the roof's surface isn't properly prepared, the coating won't stick to it. If the coating doesn't adhere to the roof as well as it should, it may start peeling off prematurely. Debris and water are the most common contaminants that prevent adhesives from forming. Therefore, you need to clean the roof thoroughly and let it dry before applying any coating.
Apart from cleaning and drying the roof, you also need to fix up existing conditions such as cracks and open seams. Don't forget that a roof coating isn't meant to fix roof problems, but to prevent them. Therefore, if the roof is already leaking, plug the cracks first before applying the coating.
Using the Wrong Coating
Another potential problem is the use of wrong coatings for the roof. The choice of the coating depends on different factors such as the slope, material, and condition of the roof, among other things. Each coating has its strengths and weaknesses, which make it suitable for a particular roof.
For example, urethane coating (an example of polymer-based coatings) is suitable for roofs that experience friction or mechanical forces such as those from hail or foot traffic. This is because urethanes resist such forces better than other coatings. Imagine not knowing this and then choosing any other coating for use in high-traffic areas; you will be forced to recoat your roof sooner than you should.
Applying the Wrong Coating Thickness
Lastly, problems may also originate from the application of the wrong coating thickness. You need to get the coating thickness right; both too thin and too thick coatings are bad. For example, an extremely thin coating will not protect the roof as well as it should. On the other hand, an extremely thick coating will deteriorate first when bubbles, blisters, and wrinkles form. The deformities form because the top film of the coating dries up before the lower one, trapping moisture and causing the deformities.
This is why you shouldn't view coating application as a simple affair; it's much more than picking up a sprayer or roller and painting the roof. In fact, if you don't have any experience with the issue, prevent the potential complications by hiring a professional roofing company to handle the application.