Tufa Building Blocks from Canada
Lightweight tufa (volcanic tuff) blocks sawn flat for porous building walls. 6802.29.9000 covers other simply cut monumental stone articles with even surfaces. Excellent insulation properties for sustainable construction.
Duty Rate — Canada → United States
16%
Rate breakdown
9903.05.2910%Section 301 (forced labor) — additional 10% ad valorem on products of Canada
Import Tips
• Measure water absorption rates proving tufa characteristics
• Declare block dimensions precisely for volumetric duty assessment
• Fumigate if organic inclusions present per phytosanitary rules