Bitumen Impregnated Hardboard for Exterior Siding Backer from Japan
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 — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%
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