When it comes to choosing between silicone or acrylic roof coatings, it is important to have a clear understanding of the specific characteristics of each type. As a provider of roof coating services in Arizona, we have gained valuable insights into the unique benefits and drawbacks associated with these coatings. Both silicone and acrylic coatings offer advantages such as energy and cost savings, as well as extending the lifespan of older roofs. Read on to help you determine which one is better suited for your building.
Silicone Roof Coating
Silicone coatings have been around since the 1960s. They were initially used on spray foam roofs and are now used on various commercial roofing surfaces. Silicone coatings have great UV stability and resist ponding water. They are solvent-based, which means they can be applied in colder temperatures compared to water-based acrylic coatings.
Silicone coatings are efficient because they need less material for the same thickness of coating. They contain 90% or more solid materials. However, homeowners may experience problems when applying the coating, such as dirt accumulation and a slippery surface when it’s wet. It’s a good idea to have a walk path system installed in areas where there will be foot traffic to ensure a slip-resistant surface.
Acrylic Roof Coating
Acrylic roof coatings have been a popular choice for commercial roof restoration in Arizona since the 1950s. They can be applied to various substrates, including metal, modified bitumen, and concrete. Acrylic roof coatings are cost-effective, eco-friendly, and easy to apply and clean up. They are also resistant to UV rays. However, they are best suited for steep-slope metal roofs where standing water is not a problem. This is because acrylics are water-based and do not perform well in water. Although acrylics have their benefits, they tend to lose thickness over time and can freeze at lower temperatures. Therefore, they should be installed at temperatures of 50°F or higher for optimal adhesion.
Silicone vs. Acrylic: Insights from Roof Coating Services in Arizona
1. Cost
In the silicone vs. acrylic roof coating debate, acrylics generally have a cost advantage. Acrylic coating costs around $0.15 – $0.80 per square foot, whereas silicone costs around $0.50 – $1.40 per square foot.
2. Longevity
In terms of longevity, acrylic has the upper hand, lasting longer than silicone due to its superior UV and moisture resistance. Acrylic can last 10–20 years, while silicone lasts 10-15 years. But they both can be recoated to renew their warranty.
3. Reflectivity
Both silicone and acrylic coatings exhibit similar thermal reflectance (80-90%). However, silicone-coated roofs may accumulate dirt over time, potentially reducing their reflectivity and giving acrylics a slight edge.
4. UV Stability
Silicone roof coating services in Arizona outshine acrylics in UV performance, resisting chalk, breakdown, and brittleness under prolonged exposure to the sun’s ultraviolet rays.
5. Durability
While possessing similar tensile strength, silicones are more durable than acrylics over the long run. Roof coating services in Arizona know that acrylic can lose thickness as it ages.
6. Resistance to Ponding Water
Silicone coatings are best at resisting ponding water, making them ideal for flat roofs where ponding is likely. Acrylics, when subjected to prolonged ponding, can rapidly break down. So, opt for silicone coating from roof coating services in Arizona if water commonly accumulates on your rooftop.
7. Application & Clean Up
Acrylic coatings are easier to install and require only water for cleanup. In contrast, silicone coatings can be challenging on application equipment and demand virgin mineral spirits for cleanup. You will have to invest more in regular maintenance.
8. Environmental Factors
Acrylic coatings are an environmentally friendly choice because they are water-based. Having said that, many of today’s silicone coatings are made with few to no solvents and have extremely low VOCs (volatile organic compounds). As a result, certain high-solid silicone coatings are also thought to be environmentally friendly.
9. Aesthetics
Acrylic coatings are a popular choice for steep-slope metal roofs that are visible because they offer a more aesthetically pleasing finish that retains its appearance over time. On the other hand, while silicone coatings may appear similar at first, they tend to accumulate dirt and grime over time, which can negatively impact their visual appeal. Therefore, acrylic coatings may be a better option for those who prioritize long-term visual appeal in their roofing materials.
Conclusion
Choosing between silicone and acrylic coatings isn’t a one-size-fits-all decision. The selection largely depends on the specific requirements of the roofing project. Factors such as climate, existing roof conditions, budget, and desired longevity play crucial roles in determining the most suitable coating type.
If you are still confused, contact Tightline Constructions. We are the best roof coating services in Arizona for your buildings!
