Metal Roofing Systems- Understanding Gauge & Finish
- February 9, 2025
Metal roofs are becoming increasingly popular in Vancouver as they are highly durable, environmentally friendly, and give your home a sleek appearance that coordinates with many home styles and aesthetics. If you’re looking into a metal roofing system, it’s important to understand the different types and features available. Among the various options to choose from, the material and coating of the roof panels play a significant role in your roofs longevity, aesthetics, and performance. Let’s dive into understanding some of the most popular metal gauge and finish types and how these can affect your metal roofing system.
Understanding the Gauge of Metal
Metal roofing panels come in a few thickness options, referred to as the “gauge” of the metal sheet panel. While metal roofing sheets can range between 22 and 29 gauge, 24 gauge and 26 gauge are the most common options used. The lower the number, the thicker and stronger the metal. For example:
- 26 Gauge is thinner and lighter
- 24 Gauge is 33% thicker than 26 gauge
The thicker the metal sheet, (aka a lower gauge number) the more durable the roof panels will be, offering enhanced strength and performance. Therefore, a 24 gauge roof will be more robust and less prone to denting, warping, or expanding under extreme temperatures. This is something to consider if your home is exposed to stronger winds, snowier winters, saltwater, high UV, or a higher possibly of branches falling on the roof.
Understanding Metal Finishes and Coatings
Metal roofing sheets come with a few options of coatings or pre-painted finishes. Here are a couple of popular examples:
SMP Coating
SMP (Siliconized Modified Polyester) is a popular paint coating for metal roofing. It consists of polyester-based resins that are modified with silicon, offering excellent resistance to fading, chalking, and environmental factors. SMP coatings are commonly used for both residential and commercial buildings and are well-suited to Vancouver’s damp climate.
PVDF Coating
PVDF (Polyvinylidene Fluoride) coatings, considered the industry standard, are some of the highest-quality finishes available for metal roofing. They are known for their exceptional colour retention, resistance to harsh weather, and superior performance in corrosive environments. This finish has the added benefit of being able to self extinguish and generate minimal smoke in the event of a fire. PVDF coatings are ideal for buildings exposed to harsh elements or for those seeking a roof with an extended lifespan and superior aesthetic appeal. This finish can last over 100 years before needing to be repainted.
Comparing the Options
Lets compare features of each of these options:
26 Gauge SMP Standing Seam Roofs
- 26 gauge SMP metal roofs provide decent protection against the elements, including heavy rain and occasional snow. If your roof is not subjected to extreme conditions like frequent hail or high winds, this could be a good option for your home.
24 Gauge SMP Standing Seam Roofs
- A 24 gauge SMP standing seam metal roof is significantly stronger than a 26 gauge roof. It’s better able to withstand physical impacts, including hail and snow
- With its thicker metal, 24 gauge provides better thermal performance, helping to minimize expansion and contraction.
- The durability of a 24 gauge metal roof means it’s likely to last longer and require fewer repairs over time
24 Gauge PVDF Standing Seam Roofs
- PVDF metal coatings offer outstanding resistance to fading, chalking, and chemical damage. In areas that are exposed to heavy rain, saltwater from the ocean, and UV radiation, PVDF provides long-lasting protection against these elements.
- PVDF metal coatings have exceptional colour stability, ensuring that the roof retains its vibrant appearance for up to 100 years, even in the face of the harsh sunlight, rain or snow.
- In areas with high humidity and salt exposure, PVDF’s superior resistance to corrosion makes it an excellent choice for long-term durability.
Here are some signature colour options for your SMP or PVDF finish metal roof:
How to Choose the Right Option for Your Vancouver Home
When considering the best standing seam roof for your property in Vancouver, you need to take into account factors like the specific needs of your home and the environmental conditions your roof will face.
26 Gauge SMP
24 Gauge SMP
24 Gauge PVDF
Choose 26 Gauge SMP if you are looking for a basic option that will provide good performance. It will handle Vancouver’s wet climate well, although it isn’t as resistant to extreme climates or physical impacts as the thicker options.
Choose 24 gauge SMP for a strong durable roof that can withstand heavy weather. It’s a great choice for most residential and commercial properties that need a durable, reliable roof that performs well in Vancouver’s climate.
Choose 24 gauge PVDF if you’re looking for a roof that will perform exceptionally well in harsh weather. It offers unmatched resistance to fading, corrosion, and weathering. It is ideal for commercial buildings or homes in coastal areas, with high UV exposure, or exposure to intense weather patterns.
Consider Eco Exteriors
At Eco Exteriors, we understand that choosing the right roofing material is a big decision. Our team is here to help guide you through the selection process, ensuring you get a roof that not only meets your needs but exceeds your expectations. Whether you’re looking for durability, cost-effectiveness, or long-lasting beauty, we have the perfect solution for your home or business. Reach out to us today to discuss which metal roofing option, including gauge and finish, is the best fit for your next project!
