Know the different types of roof coatings?
What suits your building best?
Having a roof to your name is one of the greatest accomplishments you can achieve in business. One of your most important responsibilities is taking care of that roof. This may mean that you need to learn all you can about roof coatings, the options available and which suits your building best.
Whether you are a CEO or facilities manager, you need to know your roof. After all, everything inside your building depends on its sturdiness and dependability. That’s why it’s vital for you to maintain your roof, have it inspected regularly and choose the roof coatings that are right for your building.
What are the different types of roof coatings?
A good roof coating and restoration plan can add new life to your existing roof. Unlike a roof tear-off or replacement, roof coating applications can take place during normal business hours with almost no interruption in your workday or productivity. In addition, it’s an environmentally friendly, sustainable way to protect your building and real estate investment.
Acrylic roof coatings – this type of coating contains different kinds of the acrylic polymer. While they come in a number of colors, most companies choose white for its reflective properties. It’s durable and inexpensive and is perhaps the most common type of roof coating. Acrylic roof coatings are usually applied in two coats, so it doesn’t need to be as thick as other types. It does, however, need reapplication within 2-3 years.
Asphalt emulsions – this coating consists of asphalt fragments dissolved in water. Clay is used as an emulsifier. It also includes fibers and fillers to give it additional strength. You can find it in black or brown. Also, it’s available with titanium dioxide or aluminum pigment, which makes it reflective. Asphalt emulsion coatings require very little material and need nothing more than a push broom for the application. As a result, installation is easy, making it a popular choice for commercial roofs.
Polyurethane coatings – the chemistry of this coating is a bit more complex than some of the others. It’s made from a polyol (a type of alcohol) and reacting organic compounds. Most are thermosetting polymers that do not melt when heated, which make it an ideal material for roof coatings. These coatings are available in two categories: aromatic and aliphatic urethanes. The aromatic version is typically cheaper but not UV stable and the aliphatic type is more expensive but it holds color well and offers more UV protection. It has an option for application as a foam spray, which some roofers find easier to handle.
Solvent-based asphalt – this is a coating in which the asphalt is diluted with solvent to liquefy it and make it easier to apply. Roofers often refer to it as a cutback coating. You can find it in black or with a reflective aluminum finish. These coatings require an application with heavy nap rollers. It’s important to note that these types of coatings may also contain asbestos, which can cause lung scarring, inflammation, and certain cancers if inhaled. Therefore, roofers should take extreme caution when working with this material.
Solvent-based silicone – the creation of this coating starts with a silicone base and then adds a catalyst and solvents. Since silicone is natural, it’s also eco-friendly and recyclable. There are many different ways to apply this coating, such as spraying and rolling. It comes in various colors, including translucent. Many commercial roofers prefer this material due to its numerous advantages. For instance, solvent-based silicone is known to reduce ponding and it will stick to substrates without needing a primer.
How do you know which roof coating is right for your building
The right roof coating will protect your roof and building from harmful UV rays of the sun and help you save on energy costs. In addition, it helps to reduce the effects of the natural expansion and contraction cycles which can lead to premature roof failure if not managed properly. It should also be water resistant.
Roof coatings are great for providing an additional level of safety and security for your roof, but only if you choose your materials carefully. To find the roof coating that best suits your building, you must take several factors into consideration. These include location, foot traffic, weight and exposure to a variety of chemicals. You must also think about the slope of your roof. If you have a steeply pitched roof, it will take more passes to complete a coating installation, which can add to the cost.
The current condition of your roof is also a major factor. If your roof is already in danger of failure, no coating will be good enough. By maintaining your roof with regularly scheduled inspections and roof coating applications, you can significantly extend the lifespan of your commercial roof and put off an expensive roof replacement.
Acrylic roof coatings are water-based so they work well in most climate conditions, although they work best in a dry area. They are easy to work with and offer a cost effective solution to your commercial roofing needs. Among its disadvantages, acrylic coatings can lose thickness from weather exposure and is less than effective for handling ponding because they break down in these conditions. Also, temperatures need to be 50 degrees or above for application.
Polyurethane coatings, if you use both types together, are durable and more impact-resistant. Even if you choose the white version, it looks and stays clean longer. Some of the drawbacks of this material include a more expensive cost than acrylic coatings and a stronger odor. Also, it offers excellent adhesive properties on most substrates, even without using a primer.
Silicones based coatings, which are solvent-based, are better at dealing with different weather conditions and generally perform well in ponding situations. This makes it just right for wet or humid conditions. It experiences almost no erosion and doesn’t get stiff or tough. It does have the downside, however, such as losing its reflective properties over time. Also, it is hard for anything to stick to silicone, so when it’s time for re-coating, you must either remove all the old coating first or re-coat with a different kind of silicone. In addition, they show dirt more than other options, so this might not be the best choice if aesthetics are a chief concern.
Blog Source: Peck Brothers Roofing | What are the different types of roof coatings?