Mineral Fiber Insulation: Market Size & Forecast 2026

The global mineral fiber insulation market reached approximately USD 32.5 billion in 2025 (base year), growing at roughly 4.6 percent CAGR through 2032 to a forecast USD 44.1 billion endpoint. The category operates in a structurally tight supply balance: energy-intensive melting and fiberisation lines, constrained by natural gas and electricity costs averaging 24 percent of finished-unit economics, leave little room for sudden capacity additions. Glass wool commands 52 percent of volume, stone wool 38 percent, and the two families serve materially different specification demands. Glass wool dominates residential retrofit; stone wool leads in non-residential fire-rated assemblies and industrial pipe lagging. Buyers face a concentrated upstream supply base, regulatory cost inflation from the EU PPWR and CBAM carbon border mechanism, and a Section 301 25 percent tariff on Chinese-origin pro

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