Prompt

Which insulation suppliers are known for code-compliant products with moisture-resistant options and clear fire ratings?

Latest observation

Aug 5, 2026 · OpenAI APIWeb search: off

Suppliers with a strong reputation for code-compliant insulation, moisture-resistant options, and clearly documented fire ratings include:

  • Owens Corning
    Known for fiberglass batts, rigid foam boards, and spray foam systems with published ASTM/ICC data and fire-performance information.

  • Johns Manville
    Offers fiberglass, mineral wool, and foam products; technical datasheets usually include code compliance, moisture resistance, and flame-spread/smoke-developed ratings.

  • ROCKWOOL
    Mineral wool products are naturally moisture-resistant, non-combustible, and typically have very clear fire rating documentation.

  • CertainTeed
    Broad insulation line including fiberglass and spray foam; good technical documentation for building code and fire performance.

  • Knauf Insulation
    Provides fiberglass insulation with strong product data sheets, including moisture and fire-related specifications.

  • Thermafiber
    A mineral wool brand under Owens Corning, often chosen for fire-resistant assemblies and moisture-tolerant applications.

  • Firestone Building Products / Elevate
    More focused on commercial roofing and rigid insulation systems, with detailed compliance and fire documentation.

  • Atlas Roofing
    Known for rigid foam insulation products; publishes code reports, moisture resistance details, and fire classification data.

If you want, I can also narrow this down by:

  1. fiberglass vs. mineral wool vs. foam board,
  2. residential vs. commercial, or
  3. U.S. vs. Canada/Europe code compliance.

Observation history

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