4 Types of Roof Coatings: How to Pick the Best for Your Facility Match the roof coatings with the best properties for your particular application. There are several types of coatings available on the commercial roofing market. The material formulations, uses, and application methods are all different, so facility managers should examine the manufacturer’s material data sheets to determine which product is suitable for their specific project.
- Not all coatings are acceptable or compatible on all roof surfaces.
- Also, all pre-application preparation should be completed in accordance with the roof coating manufacturer’s requirements.
- As with all liquids and adhesives used in the roofing industry, proper on-site material storage is important, and all of these products have a specified shelf life.1.
Acrylic coatings: Acrylic coatings were originally developed to provide ultraviolet protection for sprayed urethane foam applications. These types of coatings are now used on a variety of roof membrane surfaces, including single-ply membranes and metal systems.
Acrylic-based materials provide excellent resistance to radiation and hail damage and have the inherent flexibility required to withstand dimensional instability of most roof membrane surfaces. Some studies have indicated that properly formulated acrylic coatings can reduce surface temperature as much as 20 degrees F when exposed to direct sunlight at 85 degrees F.
Acrylic coatings are manufactured of 100 percent acrylic and can be applied in one or more coats. Most manufacturers provide warranties based on the coverage rates; extended warranties require additional coverage. Acrylic coatings should not be applied in freezing temperatures or when precipitation may occur within a specified period from application.
Cure time of these products is highly weather-dependent and cold weather or high humidity will impede curing. Ideal curing takes place with warm weather and low humidity. Acrylic coatings are economical, provide excellent reflectivity, and are easy to work with. These coatings also, however, lose mil-thickness from weathering, require application in ambient temperature of above 50 degrees F, and cannot withstand ponding water.
Several acrylic coating manufacturers now offer instant-set materials. This reduces the cure time of the acrylic coating to a few minutes, thereby eliminating the possibility of coating run-off if there is precipitation directly after application.2. Silicone coatings.
Silicone coatings are manufactured with a high solids’ dispersion of 100 percent silicone. It is a highly elastic material that provides excellent adhesion to the existing surface. Silicones provide good weather resistance and rarely become hard or brittle. Silicone coatings have gained market share on the commercial roof market in the last decade.
The rise in applications is primarily due to the material’s ability to withstand long-term exposure to ponding water, as most of the other coatings cannot withstand ponding water. Silicone coatings also provide excellent ultraviolet protection in extreme temperatures and harsh environments and can resist oxidation.
- Silicone is available in a variety of colors and provides high reflectivity and emissivity ratings.
- Some of the drawbacks are cost, application requirements, and the fact that there are only a few materials – other than silicone – that can be applied directly to the silicone surface.
- Silicone also holds dirt on the surface and loses reflectivity over time.3.
Polyurethane coatings. Polyurethane coatings were initially developed to be applied over sprayed-in-place foam roofs. They are now used as coating applications over a variety of existing roof membranes. Polyurethane coatings provide the best rates of all coatings for impact resistance and for foot traffic.
There are two types of polyurethane roof coatings: aromatic and aliphatic. These types of materials are typically used in combination of base coat and topcoat. The base coat material is durable but does not offer high UV resistance. The aliphatic coating is used as a top surface because it is UV stable, stays clean, and holds color longer than other coatings.4.
Fluid-applied asphaltic rubber membrane system. Technological advances and labor shortages have led to the development of fluid-applied materials that can effectively extend the service life of the existing roof system at economical rate. An asphaltic rubber membrane system has been developed that can be applied in cold-process fluid-applied applications in use for life extension repairs.
- The asphaltic rubber material combines the elastic properties of rubber with the waterproof/weatherproof characteristics of a highly refined emulsified asphalt.
- The resulting formulations are proprietary materials that form a fully adhered monolithic, seamless, rubber membrane.
- The resulting membrane can be applied to range from 20 mils to 200 mils dry.
Unlike coatings that only provide a film surface or adhesives that require reinforcements for waterproofing capacity, the asphaltic rubber forms a monolithic, seamless membrane that provides instant waterproofing/weatherproofing capabilities. The use of these materials in combination with coatings provides a long-term, economical repair system.
What is the best paint to use on a roof?
Disclosure: This post contains affiliate links and I may earn a small commission if you purchase through these links. Metal roofs are trendy, durable, and visually appealing when they have the right color. If you are looking to enhance the curb appeal of your home, you can paint the metal roofs. Painting has to be done right, and you need to first choose the right paint to achieve quality results.
The painting process and the products you choose are dependent on the metal type and whether the rust is present or not. Read on to learn more. There are hundreds of colors to choose from and a handful of paint types for your metal roof. Choose metal paint based on the type of metal that forms the roofing.
The roof may be made of zinc, aluminum, steel, tin, and rib metal among others. If you have a bare metal roof, you should go for acrylic latex paint. You can also use acrylic paint if you are painting over old paint. If you have a classic home with a terne metal roof, you will need oil-based paint.
The galvanized roof paint is basically acrylic paint. You can also use a galvanized metal primer and then use an oil-based alkyd paint. If you are looking for a more general metal paint, you can use Sherwin Williams’ metal roof. The results you hope to achieve will also determine the type of metal paint you go for.
For instance, if you are looking for energy-efficient paints, choose an option that can reflect heat and sunlight so choose lighter colors. You can also go for paints with insect repellent capabilities, water resistance, and fire resistance among other qualities.
What is the best waterproof roof paint?
Epoxy Waterproofing Paint – Epoxy paint is made from resins, and the chemical name of this paint is poly-epoxides. This is best suitable as a waterproofing paint for roof ; when you face the struggle of damps on your roof. Hence, epoxy paints are known as damp-proof paints. Applying this paint on the surface of your roof can protect it from water penetration, chemicals, and even from the concentric acids.
Do you need to clean a roof before painting?
Surface Preparation – Preparation is the most crucial step in painting your roof. Your roof should be free of any dirt or debris as this may hamper paint adhesion and their overall results. This can be done by brushing it lightly with a stiff bristle brush and thoroughly cleaning it with high-pressure water.
How long does roof paint last?
HOW LONG DOES ROOF PAINT LAST? – When you use the right high quality paint for the job combined with accepted application techniques on top of adequate surface preparation you can expect roof paint to last for 15 years and more. If you neglect the surface preparation your paint performance will never last as long no matter how good the paint is.
- Drying times and conditions also play a big role in how well your paint will perform.
- This is especially important given the highly variable weather conditions that can occur throughout Australia.
- It’s critically important to follow the manufacturer’s instructions around preparation, temperature and drying times for all paint types.
The Roofbond by Shieldcoat range of roof coatings come with a 10 year to 15 year warranty. Shieldcoat products also come with a warranty against significant loss of gloss or colour. Colour fade is an important part of the equation when choosing the best roofing paint for your setting.
What is the most weather resistant paint?
Acrylic Paint Lasts Longest – You don’t have to take our word for it. Numerous professional painters agree that acrylic exterior paint gives the longest-lasting finish. Pamblanco Painting gives a great summary of the benefits of acrylic exterior paint: “Acrylic paint lasts the longest and is also known for resisting all sorts of damage caused by weather and other natural variables.
Acrylic Latex: Great for most outside surfaces including wood, masonry, siding, metal, and exterior trims. These paints are especially resilient against temperature fluctuations. Acrylic Enamel: Exterior walls are where these paints do their best work, offering high durability. Acrylic Latex Enamel: These paints offer the strength benefits of acrylic enamel with added gloss for a more high-impact finish.
If your home or managed property paint job isn’t standing up to the California heat, we recommend asking your for their preferred acrylic exterior paints ahead of your next painting project.
How long will roof coating last?
Summary: roof coating systems last 10-20 years, but once they reach the end of their warranty, they can be recoated and a new warranty begins. The process can be repeated, making roof coating systems a renewable and sustainable roofing system. Do you have a commercial roof that needs to be restored? Perhaps your warranty ran out, but your roof is still in good condition? Did you know you can add an elastomeric roof coating over your existing roof to extend its life? But for how long? Elastomeric roof coatings can last between 10 and 20 years.
This all depends on the thickness of the coating applied to your roof. A 10-year warranty requires 20 mils of coating. A 20-year warranty requires 30 mils of coating. At West Roofing Systems, we’ve been extending the life of well-conditioned roofs through elastomeric roof coatings since 2007 (roofing in general since 1979).
Is it OK to paint roof over existing shingles?
Can You Paint Asphalt Shingles? – You can absolutely paint roof shingles! However, many professionals recommend against it; consequently, you need to think about what exactly you want to accomplish while taking the current state of your roof into account.