Metal roofs have gained a reputation for their durability, energy efficiency, and aesthetic appeal. However, like all roofing materials, metal roofs require maintenance to ensure they continue to perform at their best for decades.
One of the most effective ways to prolong the life of a metal roof is through roof coating. We’re here to walk you through everything you need to know about roof coating for metal roof systems, including:
- What it is
- It’s benefits
- It’s cost
What is Roof Coating?
Roof coating is a protective layer applied to the surface of a roof. It serves multiple functions, including sealing leaks, reflecting UV rays, and preventing corrosion. Roof coatings are typically elastomeric, meaning they have elastic properties that allow them to expand and contract with the roof’s movements. This flexibility is crucial for metal roofs, which can expand and contract significantly with temperature changes.
Benefits of Roof Coating for Metal Roofs
Metal roofs are known for being durable. Is a roof coating system really going to make that much difference? We think so! Here are a few of the benefits
Extends Roof Lifespan
One of the primary benefits of applying a roof coating to a metal roof is that it significantly extends the roof’s lifespan. The coating acts as a protective barrier against the elements, such as UV radiation, rain, snow, and wind. By shielding the metal from these elements, the coating prevents rust and corrosion, which are common issues for metal roofs.
Enhances Energy Efficiency
Roof coatings can also enhance the energy efficiency of a building. Reflective roof coatings reflect a significant portion of the sun’s rays, reducing the amount of heat absorbed by the roof. This can lower the building’s cooling costs, making it more energy-efficient. For commercial properties, this can translate into substantial savings on energy bills.
Improves Aesthetics
A fresh coat of roof coating can rejuvenate the appearance of a metal roof, giving it a new lease on life. Roof coatings come in various colors, allowing property owners to choose a shade that complements the building’s overall aesthetics.
Reduces Maintenance Costs
Regular maintenance of a metal roof can be costly and time-consuming. However, applying a roof coating can reduce the frequency and extent of maintenance required. The coating seals minor leaks and cracks, preventing them from developing into more significant issues that would necessitate costly repairs.
Environmentally Friendly
Many modern roof coatings are environmentally friendly and contain low levels of volatile organic compounds (VOCs). Additionally, by improving the energy efficiency of a building, roof coatings help reduce the building’s carbon footprint.
4 Types of Roof Coatings for Metal Roofs
Several types of roof coatings are suitable for metal roofs. Each type has its unique properties and benefits, making it essential to choose the right one for your specific needs.
1. Acrylic Coatings
Acrylic roof coatings are water-based and are known for their excellent reflectivity and UV resistance. They are easy to apply and are cost-effective. Acrylic coatings are ideal for climates with moderate temperatures but may not perform as well in areas with extreme temperature fluctuations.
2. Silicone Coatings
Silicone coatings are highly durable and provide excellent waterproofing capabilities. They are resistant to ponding water, making them suitable for flat or low-slope metal roofs. Silicone coatings also have good UV stability and can withstand extreme temperatures. However, they can be more expensive than other options.
3. Polyurethane Coatings
Polyurethane coatings are known for their toughness and resistance to impact and abrasion. They are ideal for roofs that experience heavy foot traffic or are exposed to harsh weather conditions. Polyurethane coatings come in two types: aromatic and aliphatic. Aromatic polyurethanes are less UV stable and may yellow over time, while aliphatic polyurethanes offer better UV resistance and color retention.
4. Asphalt Coatings
Asphalt coatings are bitumen-based and provide good waterproofing properties. They are typically used on older metal roofs that need a cost-effective solution. However, asphalt coatings are not as reflective as other coatings and may not offer the same energy efficiency benefits.
How to Choose the Right Roof Coating
Choosing the right roof coating for your metal roof involves considering several factors, including the roof’s condition, the climate, and your budget. Here are some tips to help you make an informed decision:
- Assess the Roof’s Condition: Before applying a roof coating, it’s essential to assess the current condition of the metal roof. Look for signs of rust, corrosion, leaks, and other damage. If the roof is in poor condition, it may need repairs before a coating can be applied.
- Consider the Climate: The climate in your area plays a significant role in determining the best type of roof coating. For example, if you live in an area with hot summers, a reflective coating that reduces heat absorption would be beneficial. In contrast, if your region experiences heavy rainfall, a waterproof coating like silicone may be more suitable.
- Evaluate Durability and Longevity: Different roof coatings offer varying levels of durability and longevity. Consider how long you want the coating to last and how much maintenance you’re willing to undertake. High-quality coatings may have a higher upfront cost but can provide long-term savings through reduced maintenance and energy efficiency.
- Budget Considerations: Budget is always a crucial factor in any home improvement project. While it’s essential to choose a coating that meets your needs, it’s also important to stay within your budget. Compare the costs and benefits of different coatings to find the best value for your money.
Step-by-Step Guide to Applying Roof Coating
Applying roof coating to a metal roof is a multi-step process that requires careful preparation and execution. Here’s a step-by-step guide to help you get started:
Step 1. Clean the Roof
The first step in the application process is to thoroughly clean the roof. Remove any dirt, debris, moss, and loose rust using a pressure washer or a stiff-bristle brush. Ensure the roof is completely dry before moving on to the next step.
Step 2. Repair Any Damage
Inspect the roof for any signs of damage, such as rust, holes, or loose seams. Repair any issues before applying the coating. Use a rust converter to treat rusted areas and apply a suitable patching material to seal any holes or gaps.
Step 3. Apply a Primer
Applying a primer helps the roof coating adhere better to the metal surface. Choose a primer that is compatible with both the metal roof and the type of coating you plan to use. Follow the manufacturer’s instructions for application and drying times.
Step 4. Choose the Right Tools
Selecting the right tools for applying the roof coating is crucial for achieving a smooth and even finish. Common tools include brushes, rollers, and spray equipment. The choice of tools depends on the type of coating and the size of the roof.
Step 5. Apply the Coating
Once the primer is dry, it’s time to apply the roof coating. Follow the manufacturer’s instructions for mixing and application. Apply the coating evenly, ensuring that all areas are covered. For best results, apply multiple thin coats rather than one thick coat. Allow each coat to dry before applying the next.
Step 6. Inspect the Finished Roof
After the final coat is applied and has dried, inspect the roof to ensure complete coverage and even application. Look for any missed spots or areas that need touch-ups. Make any necessary adjustments to achieve a flawless finish.
Step 7. Regular Maintenance
To maximize the benefits of the roof coating, perform regular maintenance on your metal roof. Keep the roof clean and free of debris, and inspect it periodically for signs of wear or damage. Address any issues promptly to prevent them from worsening.
Protect Your Metal Roofing With Premiere!
A roof coating is a valuable investment for anyone looking to protect and prolong the life of their metal roof. Whether you’re a building manager, commercial property owner, or homeowner, understanding the different types of coatings and their benefits can help you make an informed decision.Ready to take the next step? Contact Premiere Roofing to discuss your options and get started on your roof coating project today.
