Applying elastomeric or silicone coatings to your metal roof is a strategic investment that delivers multiple benefits, from extending your roof's lifespan to improving your building's energy efficiency. These specialized coatings create a protective barrier that addresses common metal roof issues while enhancing overall performance.
Extending Roof Lifespan
Metal roofs naturally deteriorate over time due to constant exposure to harsh elements. A properly applied coating system can significantly add years to an aging metal roof's functional life. Rather than facing the substantial expense and disruption of a complete roof replacement, coating your existing metal roof creates a renewable surface that can be maintained for decades. The seamless membrane formed by these coatings protects against UV radiation, temperature fluctuations, and moisture—the primary factors that accelerate metal roof deterioration.
Superior Leak Prevention
One of the most common issues with metal roofs is leaking, particularly around fasteners, seams, and penetrations. Silicone coatings create a continuous, waterproof membrane across the entire roof surface. This seamless layer bridges small gaps, covers fastener heads, and seals panel seams—effectively eliminating the most vulnerable points where water infiltration typically occurs. The flexible nature of these coatings allows them to expand and contract with the metal substrate during temperature changes without cracking or separating.
Rust and Corrosion Protection
Metal roofing is susceptible to rust and corrosion, especially in areas with high humidity or rainfall. Protective coatings create an impermeable barrier that prevents moisture from reaching the metal surface. The application process includes thorough cleaning of affected areas before the coating is applied, addressing existing corrosion issues while preventing new ones from forming. This comprehensive protection system significantly extends the structural integrity of the metal roof.
Energy Efficiency Through Cool Roof Technology
Both elastomeric and silicone coatings offer excellent reflective properties that transform your metal roof into a "cool roof." These highly reflective surfaces redirect a significant portion of solar radiation away from your building rather than absorbing it. In Arizona's intense climate, this can reduce roof surface temperatures by 50-60°F, dramatically decreasing heat transfer into the building. The resulting reduction in cooling costs can be substantial—many building owners report energy savings of 10-20% after applying reflective roof coatings.
Comparative Benefits of Different Coating Types
Elastomeric (Acrylic) Coatings
- More affordable initial investment
- Excellent flexibility and UV resistance
- Highly reflective for energy efficiency
- Best for sloped metal roofs where water doesn't pond
- Typically require recoating every 5-7 years
Silicone Coatings
- Superior waterproofing capabilities
- Outstanding UV stability and weather resistance
- Better long-term durability in extreme conditions
- Typically last 10-15 years before recoating
- Higher initial cost but potentially better long-term value and waterproofing functionality
Cost-Effectiveness Compared to Replacement
Coating your metal roof is significantly more economical than replacement, typically costing 1/3 to 1/2 the price of a full tear-off and installation. The process eliminates expenses associated with roof removal, disposal fees, and potential business disruption. Additionally, roof coatings are often classified as maintenance rather than capital improvements for tax purposes, potentially offering financial advantages. The renewable nature of coatings means that when the system eventually weathers, another coating can be applied without removing the original system.
Professional Application Process
The effectiveness of any coating system depends heavily on proper application:
- Thorough cleaning to remove dirt, debris, and contaminants
- Installation of reinforcement fabric at seams and transitions
- Application of the coating at the specified thickness
- Quality control inspection to ensure complete coverage
Simplified Maintenance and Long-Term Value
Coated metal roofs require less maintenance than their uncoated counterparts. Regular inspections and occasional cleaning to maintain reflectivity are typically all that's needed. The coating system simplifies future repairs, as small areas can be touched up without extensive work. As the coating approaches the end of its service life, recoating is a straightforward process that renews the protection and reflectivity without the need for removal of the existing system.
Environmental Benefits
Beyond the direct advantages to your building, coating your metal roof offers environmental benefits. The extended lifespan reduces construction waste from premature roof replacement. The improved energy efficiency decreases power consumption and associated carbon emissions. Many coating products are now formulated with low VOCs (volatile organic compounds), minimizing their environmental impact during application.
By investing in a quality coating system for your metal roof, you're not just solving immediate problems—you're implementing a sustainable, long-term solution that protects your building, reduces operating costs, and contributes to environmental conservation.