National Coatings Blog

Why the US Coast Guard Choose AcryShield Metal Roof Coatings

Posted by Nicole Gale on Tue, Sep 02, 2014 @ 10:00 AM

004The United States Coast Guard hangar at the Los Angeles Airport (LAX) was worn and aging. Facility maintenance employees were looking for a long-term solution that would provide cost savings, Title-24 approval, energy efficiency and they wanted to avoid a costly and timely roof replacement.

The 39,300 square foot hangar had several challenges that needed to be met. There were metal panels that required repair and maintenance. There were sections where rust needed to be removed, replaced and re-coated with a rust-inhibitive acrylic primer – RustShield A120. This ensured proper preparation of the rusted surfaces in order to provide excellent resistance and protection against flash rusting and corrosion. The hangar also required a durable coating that could withstand updraft from helicopter rotor blades during take off and landing.

National Coatings provided the US Coast Guard with the AcryShield® Roof Management (ARM) System along with the replacement and re-coating (RustShield A120) of heavily rusted sections. The metal roof coatings used in the ARM System provided additional protection to the metal roof from the harsh conditions of jet fuel and salt water in the air from the nearby ocean. The white reflective topcoat was Title-24 compliant and provided the US Coast Guard with a cooler temperature inside the large metal hangar.  036The AcryShield metal roof coatings are able to to reflect a majority of the heat away from the structure, prohibiting the building from absorbing much of the sun’s heat, resulting in a cooler environment inside the building. The US Coast Guard was pleased with their decision to use metal roof coatings to restore their hangar opposed to a full roof replacement which would have been much more costly and time intensive.

The AcryShield Roof Management System allowed the US Coast Guard to maintain their existing roof, eliminating any tear-off costs and loss of time due to tear-off procedures. This metal roof coatings system provided a sustainable and renewable solution allowing the US Coast Guard to extend their roof service life and lower roof maintenance costs indefinitely.

FREE GUIDE: Metal Roof Coating Systems

For more information on metal roof coatings or systems, download our FREE METAL COATING GUIDE!

Tags: Coating Metal Roofs, Metal Roofs, Metal Roof Coating Systems, Metal Roof Coating, Metal Roofing Systems, Metal Roof, Metal Roof Paint, Restore Metal Roof

Coating Metal Roofs

Posted by Nicole Gale on Thu, Jun 05, 2014 @ 08:00 AM

Can I Coat Metal Roofs?

How Do I Coat Metal Roofs?  

Coat Metal RoofsCoating metal roofs using the AcryShield Roof Maintenance System, ARM, is relatively easy.  But first, it is vitally important that the roof be evaluated for the type of metal and original coating used (if any).

If the roof is not coated, it is important to know the metal type.  If the roof is galvanized steel, aluminum, or Galvalume, the roof can easily be coated after a thorough pressure wash, rinse and drying.  Weathering of these metals causes a tough "scale" to develop on the surface which actually increases the adhesion of the coating to the metal.  Two coats of AcryShield roof coating are then applied.  AcryShield A500 or A510 is recommended for colder climates, while A400 is recommended for warmer more temperate climates. (See Metal Roof Membranes for more information.)

If the roof is steel and there is no "red rust" (iron oxide), then the roof can be coated as above.  However, if there is "red rust" present, this must be removed with a wire brush or wire wheel fitted to an electric drill.  After the rust is removed and wiped clean, RustShield A120 primer is immediately applied.  The RustShield primer contains a unique additive that prevents "flash rusting", discoloration of the coating due to the fresh steel's chemical reaction with the waterborne coating. 

If the metal had been previously coated, the roof is first cleaned as in the uncoated metal coating procedure above, and then coated with the AcryShield coatings.One key distinction: If the coating is Kynar or other PVDF coating chemistry, then AcryShield A130 normally recommended for coating PVC roofing is applied at 0.5 gallons/ SQ.  This acts as a primer to provide adequate adhesion of the AcryShield topcoat to the underlying coated metal.   

Details Seams and Penetrations:
After cleaning, details such as fasteners, penetrations, lap seams and standing seams are made watertight using butyl caps (applied to exposed fasteners) and butyl tape applied to lap and standing seams.  As an alternative, AcryFlex A150/151 and polyester mesh T272 can be applied to seams.

For additional information on metal roofing, download our FREE Metal Roofing Brochure and check out some of our Metal Roof Case Histories – U.S. Coast Guard Hangar at LAX, Hundley Hardware Co., GateGourmet, and Sears Warehouse.

Coat Metal Roofs

Tags: Roof Coating, Metal Roofs, White Roof Coating, Roof Coating, Roof Coating Membranes, Roof Coating Systems, Metal Roof Coating Systems, Metal Roof Coating, Metal Roofing Systems, Metal Roof, Metal Roof Paint, Restore Metal Roof

Does Metal Roof Paint - aka Metal Roof Coating - Reduce Corrosion on my Metal Roof?

Posted by Nicole Gale on Tue, Apr 29, 2014 @ 08:00 AM

Metal roof paintTo begin this article, we’d like to explain the term metal roof paint and metal roof coatings often referred to each other as the same. While this is fine with us, we will use the term metal roof coating because the word “coating” is the proper terminology as these products are thicker, more flexible and last longer than traditional paint. A paint could not provide the protection and durability a roof needs in order to survive the sun’s UV ray exposure, as well as, other harsh elements a roof endures throughout the year.

Now, back to the question – Do metal roof coatings reduce corrosion on my metal roof? YES! Coatings are excellent at reducing and inhibiting further rust from developing. The RustShield A120 is an excellent primer for metal roofs because it was specifically engineered to combat flash rusting and provide outstanding corrosion protection.

Metal roof paintNext you are probably wondering how do you restore a metal roof that has rust corrosion? Well, on a typical aged metal roof, rust exists. In these areas, the rust must be removed either by cutting the sections of metal out that have rusted all the way through or by using a rust-inhibiting primer (RustShield A120) to stop the rust from spreading further. Butyl tape is then placed on all seams and screw penetrations and a polyester fabric is then embedded into the base coat at these areas to ensure a fully sealed and waterproof roof membrane. Lastly, an AcryShield acrylic topcoat with high reflectivity and durability is applied.  These topcoats can be color matched to your liking (see the picture below). Our topcoats provide excellent UV protection, longevity and are formulated for superior dirt pick-up resistance.

Metal roof paint

For additional information on metal roofing, download our FREE Metal Roofing Brochure and check out some of our Metal Roof Case Histories – U.S. Coast Guard Hangar at LAX, Hundley Hardware Co., GateGourmet, and Sears Warehouse.

Tags: Metal Roofs, Metal Roof Coating Systems, Metal Roof Coating, Metal Roofing Systems, Metal Roof, Metal Roof Paint