Basalt Fiber Rock Wool Roofing Board from Canada
Rigid roofing insulation boards made from melted basalt rock fibers. Classified under HTS 6806.90.00 as other mineral wool insulating articles.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Confirm basalt (not asbestos) origin with geological assay reports
• UL fire rating documentation prevents refractory misclassification