Still deciding between solid aluminum and aluminum composite panels for your facade? Both are proven materials. But choose wrong , and you could face fire risks, budget overruns, or premature facade failure. The Core Difference in One Sentence: Solid Aluminum = single solid sheet. Strong, fire-safe, 50+ years. ACP = two thin aluminum skins with a core. Lightweight, flexible, budget-friendly. The #1 Factor to Check – Core Material: Solid aluminum: non-combustible, Class A . ACP with polyethylene (PE) core : flammable – not allowed on buildings above 18m in most regions. ACP with mineral/fire-retardant core : meets strict fire codes. Cost Snapshot (Installed, USD/m²): Solid aluminum: $40–80 (higher upfront, lower long-term) ACP (fire-rated mineral core): $70–130 ACP (PE core, non-fire-rated): $30–60 ⚠️ high-rise? Avoid. Quick Project Guide: Choose Solid Aluminum for: high-rises, hospitals, coastal zones, and strict fire codes. Choose ACP for: low-rise commercial, retail signag...