Why Adhesion Important Roof Coating Material

Why Adhesion Is Important in a Roof Coating Material

Roof coating materials are designed to enhance the performance of a roof, bolster its integrity, and extend its longevity. There are several types of roof coatings available, including acrylic, asphalt, polyurethane, and silicone roof coatings. They offer different advantages, but they all have one thing in common: They all rely on adhesion.

Overview of Adhesion

The adhesion of a roof coating material refers to the bond it creates with the substrate. The substrate is the roofing material that underlies the coating. For example, the substrate may be a metal or asphalt shingle roof. In fact, adhesion may be the single most important attribute when considering the value of roof coatings.

Importance of Adhesion in Roof Coatings

Without proper adhesion, the roof coating will simply not perform as expected. Over time, the coating will begin to peel as it separates from the roof substrate. When this happens, replacement is necessary. Ensuring proper adhesion will improve the longevity of the roof coating.

Factors that Affect Adhesion

A number of factors can influence adhesion, including the selection of the coating itself. It’s important for building owners to work with a qualified contractor who understands the ins and outs of roof coating materials. An experienced contractor can choose the right roof coating for the particular type of roof. Next, the substrate material should be free from damage. Any loose shingles, for example, will need to be repaired or replaced. The substrate should be clean and ideally textured. A completely smooth roof does not lend itself to proper adhesion. However, the roof shouldn’t be too rough, either, as the coating will fail to adhere properly.

Methods of Enhancing Adhesion

To improve the adhesion of the coating, the contractor should power-wash the roof prior to application. Some manufacturers recommend using special cleaners before applying their roof coatings. After the roof dries, the contractor should check for cleanliness by pressing a strip of clear packing tape to the roof. Once peeled off, the tape should be free of debris. The contractor should perform this test on several areas around the roof. To complete the surface preparation, a base coating or primer should be applied to improve adhesion of the roof coating.

Consumer Roof Coating Reports is here to improve public understanding of the use and benefits of roof coatings. We offer objective information based on scientific, independent roof coating tests so you can make an informed decision that is right for your building. If you have any questions, you can reach our office in Phoenix at (866) 599-1354.