There is no single, fixed figure for the service life of sandwich panels; the standard range is 5 to 30 years, though some high-quality products can last over 35 years with proper maintenance. The actual lifespan depends on a combination of factors: core material type, facing material, operating environment, and maintenance practices.
Key factors affecting service life:
Materials: 304 stainless steel facings offer better corrosion resistance than standard color-coated steel; fluorocarbon coatings provide superior weather resistance compared to polyester coatings; and high-quality core materials are less prone to pulverization or settling.
Operating Environment: Coastal areas with high salt-spray levels or corrosive environments (such as chemical plants) can reduce the lifespan of standard panels to 5–8 years, whereas dry, clean indoor environments result in minimal degradation.
Installation and Maintenance: Proper sealing and waterproofing of cut edges can extend the lifespan by 5–8 years; applying an anti-corrosion coating every 10 years can extend the panel's total service life to over 35 years.
