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HSChapter 68
U.S. imports of worked slate & articles of slate or agglomerated slate (HS 680300) totaled $4.0M in April 2026, traded with 20 countries.
Importers of Worked Slate & Articles of Slate or Agglomerated Slate paid $545K in duties in April 2026 — an effective duty rate of 16% on $3.4M in dutiable value, based on actual customs collections rather than the published tariff schedule. Worked Slate & Articles of Slate or Agglomerated Slate imports of $4.0M in April 2026 ran 23% above the year-to-date monthly average of $3.2M.
Last updated: April 2026 dataSpain dominates US imports of worked slate, a position rooted in the Galicia region's extensive natural slate quarries that supply the global roofing market. The US schedule separates roofing slate (6803001000) from other slate articles (6803005000), a split that matters commercially because roofing slate competes with synthetic alternatives and carries different end-use demand cycles than decorative or flooring slate. Agglomerated slate — manufactured from compressed slate particles — is also covered, and importers must distinguish it from natural worked slate on documentation since the two can differ in durability specifications relevant to building codes.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Yes, heading 6803 explicitly covers both worked natural slate and articles of agglomerated slate, so both product types are classified within the same heading. However, commercial invoices should clearly identify whether the product is natural or agglomerated, as the distinction may be relevant to building-code compliance documentation required by the buyer.
Roofing slate demand tracks construction and re-roofing activity, which peaks in spring and early fall in most US markets. Importers typically build inventory ahead of the spring construction season, and ocean transit times from Spain — the dominant supplier — of roughly two to four weeks factor into order lead times. Weather-related port disruptions in northern European winter months can also affect supply timing.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 6803001000 | ROOFING SLATE | $2.7M | 13.58% | $307K |
| 6803005000 | SLATE, NESOI | $1.3M | 20.48% | $239K |
ROOFING SLATE
SLATE, NESOI
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 6803000000 | SLATE, WORKED AND ARTICLES; ARTICLS OF AGGLOM SLT | $318K |
SLATE, WORKED AND ARTICLES; ARTICLS OF AGGLOM SLT
213 t
OTHR ARTS NESOI OF CMNT ETC
HS 681099
MARBLE, TRAVERTINE AND ALABASTER, WORKD, NESOI
HS 680291
WORDK MONUMENTAL OR BUILDING STONE, NESOI
HS 680299
GRANITE, NESOI
HS 680293
ABRASIVES ON A BASE MATERIAL OTH THN FABRC O PAPER
HS 680530
ARTICLES OF ASPHALT OR SIMILAR MATERIALS IN ROLLS
HS 680710
| State | Imports | Exports | Balance |
|---|---|---|---|
| Georgia | $1.9M | -- | -$1.9M |
| Texas | $361K | -- | -$361K |
| California | $331K | $3K | -$328K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| SAVANNAH, GA | $1.4M | $8K | -$1.4M |
| HOUSTON, TX | $557K | -- | -$557K |
| LOS ANGELES, CA | $436K | -- | -$436K |