Bitumen-Coated Roof Underlayment Fiberboard from United States
Bitumen-coated roof underlayment fiberboard sheets, impregnated with bitumen and having a density of 0.35–0.5 g/cm³, serve as a moisture barrier in construction. These sheets are not mechanically worked or surface-covered, aligning with the tariff item's scope for low-density fiberboard. The bitumen treatment provides water resistance for roofing applications.
Duty Rate — United States → Canada
0%
Import Tips
• Confirm the density is within 0.35–0.5 g/cm³ and include this in the product documentation
• Ensure the fiberboard is not surface-covered or mechanically worked, as such treatments may lead to reclassification
• Check if the product meets Canadian construction standards for roof underlayment to avoid delays at the border