How Are Roof Coatings Applied?

Commercial roof coatings, which include materials such as elastomeric, silicone, and polyurethane, provide essential protection against weather, UV rays, and mechanical damage. Applying roof coatings in a commercial setting requires precision and attention to detail to ensure optimal performance and durability. At Unicoat Industrial Roofing, we are experts at applying roof coatings, so you don’t have to go it alone. But just in case you were curious as to the process, you’ve come to the right place. Here are the basic application techniques you can expect when having commercial roof coatings applied by a professional contractor.

1. Surface PreparationThe first step in preparing the roof for coating is a thorough cleaning. Contractors will remove all dirt, debris, and loose materials, typically using a pressure washer and broom. It may be necessary to use cleaners for stubborn stains or residues. The roof must be dry before the application of any coating.After cleaning, a detailed inspection of the roof surface should be conducted. The inspector will check for cracks, blisters, and other damage. Any issues will need to be repaired with suitable materials before applying the coating. For optimal adhesion, the surface should be slightly roughened, especially smooth surfaces like metal or single-ply membranes. This can be achieved through light sanding or abrasive blasting. Ensure all contaminants like oil or grease are removed, as these can hinder adhesion.
2. Choosing the Right CoatingThe best coating will be selected based on the roof’s material and specific needs. For instance, elastomeric coatings are ideal for flexibility and waterproofing, silicone coatings are excellent for UV resistance and ponding water, and polyurethane coatings offer high durability and chemical resistance.The chosen coating will need to be compatible with the existing roofing system and any previous roof coatings applied. A professional roofing contractor familiar with roof coatings can perform a compatibility test.
3. Application Conditions Coatings must be applied in suitable weather conditions, with ideal temperatures ranging between 50°F and 85°F (10°C to 30°C). Application during rainy or excessively windy conditions should be avoided, as the surface must be dry. Property owners should be mindful of humidity levels, as high humidity can affect drying times and overall coating performance. The manufacturer should provide guidelines to ascertain acceptable humidity ranges for each type of coating.
4. Application TechniquesDepending on the type of application, roofing contractors may use rollers, brushes, or spray equipment, each of which has its own advantages. Rollers are best for smaller areas and detailed work and brushes are useful for edging and touch-ups. Spray equipment is ideal for large areas and even coverage.Coatings are applied in the recommended thickness to ensure proper performance. Most coatings require multiple coats for full coverage. Your roofing contractor will follow the manufacturer’s guidelines for dry film thickness and the number of coats required.

   Some coatings require extended curing times to reach their full strength. Your contractor will be aware of these times and plan accordingly to avoid interference with any other ongoing roof operations. The good news is that roof coatings are one of the least intrusive ways to repair your roof.

   Once the coating is fully cured, they will perform a final inspection to check for any missed spots, inconsistencies, or defects.

   For best results and to optimize longevity, property owners should schedule regular inspections and maintenance to ensure performance. Any damage or wear should be addressed promptly to extend the life of the roof coating.

   By following these steps, your roofing contractor can help to ensure excellent protection for your commercial property.

   Hiring Unicoat for Your Roof Coating Project

   With over 75 years of hands-on experience and 4 million gallons of roof coatings installed, Unicoat is one of the country’s most trusted and reputable roofing restoration contractors. For more information or a consultation, call us today.