Bitumen Treated Fiberboard Vapor Barrier Sheets from Japan
Flexible low-density fiberboard sheets impregnated with bitumen to control moisture vapor transmission in building envelopes. Installed in crawl spaces and attics. 4411.94.00.70 classification reflects fiberboard base, low density, and specific impregnation.
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
• Include permeability test results to support vapor barrier claims during customs review
• Ensure consistent thickness declarations to match statistical reporting suffixes
• Monitor EU-sourced goods for potential forest certification requirements