Cement Sandwich Building Blocks from Canada
Sandwich blocks with a concrete core and insulating foam layers bonded by cement, used for energy-efficient walls. Classified in HTS 6810.11.00 as composite concrete building blocks.
Duty Rate — Canada → United States
13.2%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify insulation material in docs; foam content under 20% keeps it as concrete block
• Comply with building insulation standards like R-value declarations
• Avoid classifying as 'prefab panels' to stay in blocks category