Can you coat a metal roof?

metal sheet roofing

How do you restore a metal roof?

Metal roof coating for commercial and industrial buildings has been used for years, yet there are still questions about the pros and cons of metal roof coating. Like, “Does roof coating stop leaks?”, which the answer is: Yes.  A metal roof coating is a seamless roofing that is applied in liquid from and is designed to renew existing roof systems that are aged, weathered, and have developed small leaks. The elastic properties of this liquid ember allow existing roof to stretch without further damage, returning to their original shape.

May you just bought building with metal roofing that needs repairs, or you own building with a metal roof that is at the end-of-life and needs help. Either case, right now isn’t a good time to have a new metal roof installed, so you’re considering a metal roof coating. Before you spend that money, you’re wondering if that will that suffice? 

Metal roof coating is an excellent way to restore your roof cost-efficiently with two factors: Choose a reputable contractor and choose the right product for your roof. Both metal roof coating restoration process will save you money now and is eco-friendly too. 

  1. Stopping Leaks. The first step in this project is to replace any roofing panels that are compromised, then refasten loose panels and parts. Next any holes or loose seams need to be patched with an acrylic mastic metal roofing base coat or thick-bodied sealant.  
  2. Prepare the Surface. Clean the roof surface thoroughly and apply a rust inhibiting product if the existing roof has roof.  This can also be applied after you have completed the metal roof coating.
  3. Apply Metal Roof Coating. You should look for metal roof coating that offers rebates for being a green building upgrade.

How do you seal coat a metal roof?

Using an elastomeric rubber coating for a metal roof coating will provide flexibility and resistance against harsh weather. There are different metal roof coating products for every type of metal: Aluminum, Corrugated, Standing Seam, Tin, and more, even rusty metal. The process is the same in general, each brand of metal roof coating products will have specific instructions: 

  • Surface Preparation: If possible, pressure wash with clear water and allow to completely dry. Make any repairs needed and check the drainage system. Apply adhesive seam tape as needed around and on deteriorated fasteners, joints, rubber washers, seams, and around roof penetrations like vents. 
  • Applying Coating: After you have cleaned, patched, repaired, and taped, using a heavy duty paint brush, apply the metal roof coating, allow to thoroughly dry, then apply a second coating. 
roof coating

What is the best coating for metal roof?

A variety of metal roofs can benefit from an elastomeric metal roof coating and sealer to protect and seal the existing and underlying roofing material. Not only to stop any present leaking, but prevent more leaks, and limit the weathering that is normal. Metal roof coatings are designed to move with the roof  instead of being rigid and stiff. 

Some metal roof coatings are designed to keep a structure cool while others are designed to keep a structure warm.  While metal roof coating isn’t as expensive as a new roof, it is an expense with long-term implications. Ask your roofing contractor about the various type of metal roof coating products they use and recommend for your particular situation. The real physical properties you have should be considered in addition to the metal roof coating  manufacturer’s claims to get the maximum benefits. 

Among the various metal roof coatings you can choose, the following should be considered, taking into consideration your roof’s age, roof type, typical weather conditions, and environmental concerns. 

  • Acrylic: A durable and inexpensive elastomeric metal roof coatings that is comprised of high solids emulsion polymers with potent biocides, making a high-reflective coating that is ideal for extreme UV climates. The biocides give the resistance to dirt accumulation that creates mildew. Ponding water is a weakness for acrylic metal roof coatings, so making sure the roof has proper working drainage is a must. 
  • Asphalt Emulsion: Asphalt emulsion contains of asphalt particles distributed in water with clay for the bonding element.  Available in black or brown, this durable metal roof coating contains inorganic and organic compounds, with fillers. An easy and inexpensive material to use, ideal for leveling any “alligatoring” issues or other irregularities that are common BUR or modified bitumen metal roofs. 
  • Silicone: When ponding resistance and UV protection are the focus for a metal roof coating, this is the recommended material. Slow to erode without betting brittle or hard.  Silicone formulations contain more than 90% high-solid requiring less product needed for good coverage. Because dirt is attracted to this material, it required periodic cleaning to maintain its reflectivity.  
  • Urethane: Known for being the best adhesive, durability, and strength, with an impact-resistance that is above other metal roof coatings that is foot-traffic strong. Naturally contracts and expands with the temperature and building movements. 

So, do roof sealers work? The metal roof coating and sealants can provide a protective seal that keeps moisture out wile reflecting the sun’s UV rays. Applying metal roof coating to stop leaks is one of the best ways to repair any minor roof leak, keeping expensive and serious damage away. Call 740-273-8539 today for roof coating in Cincinnati, OH.

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