National Coatings Blog

What is Reflective Roof Paint?

Posted by Nicole Gale on Tue, Mar 10, 2015 @ 08:30 AM

reglazing-windows-10Reflective roof paint is actually not paint. The proper terminology is “reflective roof coating”. While roof coatings resemble paint, they are much more durable and the thickness and strength is unmatched to what paint is capable of.

At first look, paint can be mistaken for a roof coating because it has the same viscosity and the application is similar – both can be brushed, sprayed, or rolled on. However, reflective roof paint would not provide the following benefits a reflective roof coating delivers:

  • Resistance to Ponded Water
  • Reflectivity Properties
  • Flexible at Low Temperatures
  • Ability to Expand and Contract with the Buildings Movement
  • Resistance to Foot Traffic

Reflective roof coatings are designed to be installed on a horizontal surface, such as a low-sloped roof, tolerating many external stresses and having contact with water for extended periods of time. Reflective roof paint would not possess the ability to be a protectant to your roof or be used as a waterproofing mechanism to your building. Roof coatings protect the building from water penetration during wet weather, dew, fog, and ponded water situations. The coating is able to repel the water, absorbing none of it into the roof substrate below. These coatings are tough enough to be walked on when roof maintenance and equipment on the roof top needs to be serviced. Roof coating systems have a required mil thickness that provides strength and durability, offering adequate protection to the roof’s surface. The thickness also allows for the membrane to expand and contract sufficiently, without cracking or splitting. This flexibility allows the roof to move with the building during different temperature fluctuations.

Click me The next biggest difference between a paint and a roof coating is a roof coating has the ability and ingredients to reflect the sun’s heat away from the building, blocking UV rays from being absorbed into the structure. This allows the building and roof to remain at a cooler temperature, reducing air conditioning usage and cost and reducing roof degradation and deterioration, enabling it to last longer. 

There are many different roof coatings available, some are tougher and more durable and others are better at reflecting the harmful heat from the sun. We have a list of different organizations on our website that offer unbiased tests and ratings for you to research, to determine and guarantee you are getting the best roof coating product that meets your needs.

Contact National Coatings and speak to one of our roofing professionals for any questions you may have. We are here to help!

Tags: Reflective Roof Coating, Ultra High Reflectance Roof Coating, white roof paint, Reflective Coatings, Metal Roof Paint, aluminum roof paint

Downside to Aluminum Roof Paint (aka Coating)

Posted by Nicole Gale on Tue, Jul 01, 2014 @ 09:00 AM

Aluminum Roof Paint When considering a roofing system for your commercial roof, longevity, waterproofing, sustainability and durability are all necessary and important factors to research. While aluminum roof paint can provide durability and waterproofing, it poses some issues with sustainability and longevity. 

What is Aluminum Roof Paint

Aluminum roof coatings are solvent based formulated with asphalt, aluminum paste, moisture scavenger, fillers and hydrocarbon solvents. High quality aluminum roof paint options will contain high amounts of aluminum pigment to increase the reflectivity values.  ASTM D2824 –Standard Specification for Aluminum Pigmented Asphalt Roof Coatings provides resources and assistance in selecting an aluminum roof coating that is suitable for roofing applications.

Downside to Aluminum Roof Paint

FREE GUIDE:  Restore Your Aging  Roof with SiliconeThe greatest issue we have with aluminum roof coatings is its inability to adhere to other waterborne and acrylic roof coating systems in the future. This hinders its ability to be easily sustainable and renewable.  The aluminum flakes in the coating interfere with adhesion, making delamination a potential issue, increasing roof failures from occurring. Solvent-based primers can be used to support adhesion to the aluminum flakes; however, the bond between the coating and primer can still cause issues and many roof coating manufacturers shy away from the idea. We recommend contacting the roof coating manufacturer before construction begins.

Unlike acrylic coatings, aluminum coatings do not provide any waterproofing properties. They do increase reflectivity and UV protection to the roof substrate but do not improve appreciable mil thickness to the roof.  Acrylic roof coatings form a seamless, monolithic membrane when applied, creating a watertight, durable roofing substrate. Lastly, due to aluminum coatings being solvent based, they are typically higher in Volatile Organic Content VOC’s, causing unpleasant and potentially harmful odors during application. (Click here for more information on low VOC Roof Products).  

Roof coatings or roof paints are continually increasing in popularity because of their ability to be restored and renewed the current roof. They provide lower life-cycle costs, fewer disruptions to your business, lower roof maintenance costs and less hassle compared to traditional roof replacement. The sustainability factor for these roof-coating systems offer great over-all value and provides you with excellent longevity to your roof substrate.  

National Coatings offers sustainable roof restoration and roof maintenance systems that provide ultra-high reflectivity, durability, waterproofing, as well as, sustainability. All of our elastomeric roof coatings systems can be renewed, allowing you to extend your roof’s service life indefinitely.

To find out more about renewing your current roofing substrate and avoid a costly and timely roof tear-off, download our Full Line Brochure or check out our individual substrate brochures:

Commercial Roofing Contractors

Tags: Roof Systems, Coating Systems, Roof System, Coating System, Roof Restoration, Roof Maintenance, Commercial Roofing, Metal Roof Coating, Metal Roofing Systems, Metal Roof, roof repairs, Metal Roof Paint, roof restoration system, aluminum roof coating, aluminum roof paint, aluminum coating