OSB Exposure 1 Sheathing from Canada
OSB panels rated Exposure 1 for temporary weather exposure during construction, with waterproof glue lines. Standard oriented strand construction throughout thickness. Classified HTS 4410.12.00 as construction-grade OSB.
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
• Submit APA test reports proving 6-month exterior exposure performance per industry standards
• Mark panels with Exposure 1 rating visible for customs inspection to validate classification
• Distinguish from Exterior grade by noting temporary vs permanent exposure duration in docs