Metal Roof Coating
Metal Roof Coating Recommendations When coating a metal roof with a painted finish we strongly recommend that you remove any loose or peeling paint and apply one coat of our Bonding primer to the entire roof surface to ensure 100% bonding between the Roof coating and your metal roof. If your metal roof has rust spots, you need to wire brush them to remove as much of the rust as possible then prime them with a heavy Zinc primer. If you have corrosion around your bolts or screws we suggest you hit them with a zinc primer also and apply a dab of our Roof Mastic over them for added protection. That goes for any seams also. Once your roof is properly coated it should be maintenance free for many years. We would just suggest you keep an eye on the screws and joints. This is where many problems with metal roofs occur. If you’ve followed our direction you should not have this problem. Coating must be applied to entire roof for warranty coverage. Guarantee shall consist of coverage for delamination or erosion of the coating during the warranty period, coating must be applied to entire roof surface, there is no guarantee for partial roof coverage. We have never had an actual product failure but should you feel that the product has failed for any reason we request that the property owner notify ArmorGarage by email or fax with a description and nature of failure. On substantiation of a product defect, ArmorGarage, as its sole liability and the property owner
Metal Roof Coating
“Re-coating systems help extend the life of a metal roof, and that’s money in the bank,” says Kate Baumann, director of marketing and procurement at Mule-Hide Products Co. Inc., Beloit, Wis. “Only positives come from restoring a coating on a metal roof and then maintaining that coating by re-coating the roof as necessary. An elastomeric acrylic coating acts like a shield, protecting the metal roofing system from the elements, including ultraviolet (UV) radiation, and ice and hail storms. It encapsulates existing rust, even if the roof is heavily rusted. It helps keep the roof weathertight by repairing leaks, cracks and seams. Re-coating also keeps the roof sound by moderating thermal shock that can elongate screw holes.”
Metal Roof Coating
Metal Roof Coating Application Thoroughly clean and remove all dirt, mold, mildew or rust from roof, for heavily rusted metal roofs we recommend that you apply a paint compatible rust inhibitor let dry thoroughly according to manufacturer’s instructions, then apply coating.Always test for adhesion, apply ArmorGarage Special Primer if Metal is painted or if coating does not bond to rust inhibitor. Perform any repair work needed and coat all bolt heads and lap joints on metal roofs with Armor Roof Patch Mastic and let dry.For wood and concrete roofs we recommend putting a thin coat of the Roof Mastic on each joint then embed roofing mesh into that then apply a second coat to fully cover the mesh. This will act as a reinforced expansion joint over the joints. Let the mastic dry overnight. Next mix coating with heavy duty mixer in a 1/2″ drill then apply coating by roller or spray gun. Use a Commercial Sprayer with 3000 psi, .75-1 gpm minimum with a .027 – .031 tip with 3/8″ ID hoses. For hose length greater than 60′ use 1/2″ ID hoses. Graco models-Ultra Max 695 or Graco GMax 3400 or higher. Maintain the 100 sq ft/ 1 gallon spread rate. Let first coat dry 24 Hrs and then apply second coat. Maintain 1 gallon per 100 sq ft. Allow coating to dry 24-48 hrs. Do not start job if temperature will fall below 40 degrees or if rain is forecast within the curing time frame. Do not use on EPDM roofs.
Metal Roof Coating Features UL and Factory Mutual Fire Rated Mold & Mildew resistant UV & Ozone resistant with no sign of pitting or wearing under ASTM 9000 HR Accelerated Weather Test 65% Solids and not water based! Means more of the coating you apply to your roof will still be on your roof after it dries. Many coatings have more than 50% of the coating you apply evaporate away as it dries. Elongation rating of 500% with 99.999% memory retention factor. Means it stretches and contracts more than standard coatings and will maintain it’s original shape better and longer. That’s a big issue with bargain coatings they stretch out after a few years and once they do that they are not as effective at keep water out of your building! Flexible down to -40 degrees Shore A Hardness of 50 is rated for normal foot traffic, very cut and impact resistant Heat reflectivity of 90% save up to 30% on cooling costs 12 Year Guarantee! Routinely lasts 15-20 years till recoat is required. This roof coating can be recoated when needed, usually with just one coat! The new coating will reactivate the old coating and they will bond together forming a renewed roof surface with a new guarantee.
Re-coating a metal roof helps keep the building weathertight, which lowers energy consumption and costs. White roof coatings are highly reflective and can reflect up to 87 percent of the sun’s damaging rays, helping to keep the building cooler. This “cool roof” lessens the building’s environmental impact, decreases the urban heat island effect and enhances the comfort of building occupants. It also reduces the constant thermal movement of the roof that eventually leads to leaks in the roofing system. Typically, re-coating can reduce the surface temperature of a metal roof by 35 to 40 percent.
Also, “When a metal roof coating is pealing or there is surface rust, re-coating a roof will increase its longevity by increasing its corrosion resistance,” says Michael Endredi, project engineer at The Garland Co., Cleveland. “Re-coating a roof is a less costly option than re-roofing for scenarios where the roof still functions, but lacks the appeal it once had and is in danger of corroding.”
In spite of its many redeeming and rejuvenating qualities, re-coating is not a miracle worker. A metal roof should be replaced if it has not been maintained properly and has deteriorated beyond what a coating renovation can sufficiently remedy. “A coating system would not be beneficial when the roof has deteriorated to the point that it is no longer structurally sound, metal panels have started to rust through- pin holing or worse-and/or multiple roofing panels need to be replaced,” Arnold says. “Continuous attempts to repair the roof with improper or inferior products may also result in premature deterioration, requiring replacement over restoration.”
Armor Metal Roof Coating is a self plasticizing epoxy and rubber fortified acrylic that provides a monolithic encapsulating coating. Cannot be compared to water based or Home Improvement store brands. It is extremely durable and can handle large amounts of expansion and contraction without cracking or splitting! This is not your standard water based or siliconized based acrylic coating! It’s extra thickness together with our extra heavy duty epoxy additive results in a roof coating system that also works great on concrete, foam and tile roofs by filling in microscopic holes, small cracks and voids.
Baumann contends a white elastomeric acrylic coating can reduce the temperature on a metal roof by as much as 50 F and lower indoor temperatures by as much as 15 F, reducing energy consumption by 10 to 20 percent. “Energy is the single biggest expense for commercial building owners today, accounting for nearly one-third of operating costs, so the savings can be considerable,” she says. For additional savings, metal roof re-coating, when used as part of an on-going maintenance program, may bring tax advantages to building owners. “One of the key advantages of a restoration system over a new roof system is in how it is classified by the IRS,” says White. “Restoration is classified as maintenance and in most cases it can be expensed in the accounting period in which it is incurred. On the other hand, a new roof system is a capital asset that must be amortized over a 39-year life.”
Fluid Applied Metal Roofing Systems Firestone Fluid Applied Metal Roofing Systems provide two restoration options that save money and conserve energy. Saving time, material and tear-off costs, these sustainable systems also provide reflective product options that lower cooling costs for your facility. Firestone Aluminum Coating renders a cost effective solution to seal and protect metal roofs. Firestone Industrial Elastomeric White Coating assures a high level of reflective properties that keeps the roof near ambient air temperature, while minimizing the stress to fasteners and seams caused by thermal expansion and contraction. Additional elastomeric color options are gray, tan and black. Formulated with a 100% acrylic polymer, the elastomeric system provides outstanding durability, excellent adhesion and superior water protection, while improving the life and appearance of your building. Some other benefits include: ENERGY STAR® certified product that may be eligible for tax and utility credits Ease of installation, meaning minimal disruption for building tenants Single-source supplier of all needed building products Sustainable – Prolongs the need for roof replacement Firestone Fluid Applied Metal Roofing Systems are eligible for Firestone 10-year System Warranty backed by an industry leader. Watch our video to learn more about the benefits of installing Firestone Fluid Applied Metal Roofing Systems.