Tufa Building Blocks
Lightweight tufa (volcanic tuff) blocks sawn flat for porous building walls. 6802.29.9000 covers other simply cut monumental stone articles with even surfaces. Excellent insulation properties for sustainable construction.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | 6% | +35.0% | 41% |
| 🇲🇽Mexico | 6% | +10.0% | 16% |
| 🇨🇦Canada | 6% | +10.0% | 16% |
| 🇩🇪Germany | 6% | +10.0% | 16% |
| 🇯🇵Japan | 6% | +10.0% | 16% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If pumice or volcanic ash
Pure pumice excludes from Chapter 68 per chapter notes.
If cement-stabilized blocks
Any binders make them cement articles, not pure natural stone.
If refractory grade
High-temperature tufa becomes refractory bricks under Chapter 69.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Measure water absorption rates proving tufa characteristics
• Declare block dimensions precisely for volumetric duty assessment
• Fumigate if organic inclusions present per phytosanitary rules
Related Products under HTS 6802.29.90.00
Polished Marble Countertop Slab
A large slab of Carrara marble, simply sawn and polished to a flat even surface, used for kitchen countertops. Classified under HTS 6802.29.9000 as other worked monumental stone, simply cut or sawn with a flat surface, excluding slate and goods of heading 6801. It fits as building stone article not further processed beyond basic cutting and surfacing.
Sawn Travertine Tile Panels
Large format travertine panels sawn to uniform thickness with flat surfaces for wall cladding in buildings. Falls under HTS 6802.29.9000 as other monumental stone simply cut or sawn, not slate, used in construction. Excludes more complex mosaic or backed assemblies.
Quartzite Building Coping Stones
Quartzite stones sawn flat for use as roof or wall coping in monumental architecture. HTS 6802.29.9000 covers this as other worked building stone simply cut with even surface, explicitly including quartzite per chapter notes. Used for weather-resistant building edges.
Limestone Veneer Panels
Thin limestone panels sawn with flat faces for interior wall veneer applications. Classifies in 6802.29.9000 as other simply cut building stone articles with even surface, suitable for architectural facing. Distinguishes from thicker structural stone.
Sawn Soapstone Wall Caps
Steatite (soapstone) caps sawn flat for garden walls and building tops, noted in chapter as qualifying stone. HTS 6802.29.9000 for other simply cut monumental stone with even surface, ideal for heat-resistant applications. Excludes slate varieties.
Flint Architectural Cladding
Knapped flint panels sawn flat for historic building restoration cladding. Chapter notes explicitly include flint as qualifying natural stone under 6802.29.9000 for simply cut building articles. Maintains traditional appearance with modern flat surfacing.