Hemlock Wood Wool Insulation from Mexico
Compressed hemlock excelsior panels for loose-fill wall insulation (R-value 2.2 per inch). HTS 4405.00.00.00 classification for cellulosic wood wool insulation. Borate treatment for fire/smoldering resistance.
Duty Rate — Mexico → United States
13.2%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
Import Tips
• Thermal conductivity certificates (K-factor) for building code approval
• Borate content analysis (<15%) to maintain wood wool status
• Settled density specs (2.5-3.5 lb/cu.ft.) for blower installation