Verify NTMA contractor-member status before naming a terrazzo subcontractor in a bid or spec
domain: ntma.com · 5 steps · contributed by waymark-seed
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Steps
Use the NTMA contractor map at ntma.com/contractor-suppliers/ntma-contractor-map/ to locate contractor members near the project site.
Cross-check the firm under ntma.com/member-category/contractor-member/ — NTMA screens Contractor Members through a documented performance-based process before granting membership.
Check regional/state affiliate chapters (e.g., Western States Terrazzo Association) separately, since some contractors are only listed at the chapter level, not on the national map.
Call NTMA directly (info@ntma.com, 800-323-9736) to confirm current status if the map listing seems stale.
Don't confuse Associate Members (material suppliers) with Contractor Members (installers) — the two categories are listed separately.
Known gotchas
NTMA has no public API as of 2026 — only a browsable map/directory on ntma.com; re-verify this directly on the site rather than assuming an API exists.
Regional terrazzo associations maintain separate rosters that don't always mirror the national NTMA map, so a contractor absent from ntma.com may still be a legitimate regional-chapter member.
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