How to Choose Metal Roofing Panels?

To select metal roofing panels, focus on three core factors: usage scenario, performance requirements, and budget, and prioritize the following 5 key dimensions:
1. Clarify the usage scenario and environment
Match basic needs first to avoid excessive or insufficient performance:
– Industrial workshops/warehouses: Prioritize durability and cost-effectiveness; ordinary color steel plates are optional.
– Public buildings (e.g., gymnasiums, airports): Balance aesthetics and large spans; aluminum-magnesium-manganese plates or titanium-zinc plates are recommended.
– High-corrosion environments (e.g., coastal areas, chemical plants): Must choose weather-resistant materials, such as fluorocarbon-coated color steel plates or zinc-aluminum-magnesium plates.
2. Select the appropriate metal material
Different materials have significant performance differences, which directly affect service life and cost:
– Color steel plates (galvanized/galvalumed): Cost-effective, suitable for ordinary dry environments, with a service life of 10-20 years.
– Aluminum-magnesium-manganese plates: Lightweight and highly corrosion-resistant, suitable for large-span buildings, with a service life of 25-50 years (higher cost).
– Titanium-zinc plates: Naturally corrosion-resistant and self-healing, with an appearance that changes over time (forms an oxide layer), suitable for high-end buildings, with a service life of over 50 years.
– Stainless steel plates: Extremely corrosion-resistant but high in cost and weight, only used in special high-demand scenarios (e.g., chemical workshops).
3. Pay attention to core performance parameters
– Substrate thickness: Key for roof load-bearing; conventional thickness ranges from 0.4-1.2mm, and 0.8mm or above is required for large-span buildings.
– Coating type: Determines weather resistance; polyester coatings are suitable for ordinary environments, while fluorocarbon coatings are for high-corrosion/strong UV environments.
– Panel structure: Affects waterproofing and wind resistance; prioritize interlocking types (e.g., standing seam) and avoid lapped types (prone to water leakage).
4. Confirm supporting materials and installation
– Supporting materials: Synchronously select weather-resistant waterproof sealants and anti-corrosion fixing brackets to avoid shortening the overall service life due to poor auxiliary materials.
– Installation team: Choose experienced constructors, and focus on confirming the roof slope and interlocking accuracy (directly related to waterproof effects).
5. Balance cost and service life
– Short-term use (within 10 years): Ordinary color steel plates can be selected to control initial costs.
– Long-term use (over 20 years): Aluminum-magnesium-manganese plates or fluorocarbon-coated color steel plates are recommended; although the initial cost is higher, subsequent maintenance costs are reduced, making them more cost-effective overall