Bitumen Impregnated Hardboard for Exterior Siding Backer from Canada
Low-density hardboard variant impregnated with bitumen to serve as weather-resistant backing for vinyl siding installations. Provides dimensional stability in humid climates. HTS 4411.94.00.70 due to fiberboard nature, density spec, and bitumen processing.
Duty Rate — Canada → United States
10%
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
• Confirm 'other' density category excludes lacquered or overlaid variants under 4411.94.00.50
• Use correct country-of-origin marking visible after installation per CBP rules
• Avoid bulk packaging declarations that might trigger valuation disputes