#89 Stone (Crushed Granite)

#89 Stone (Crushed Granite) — The Small-Format Spec Stone for Paver Joints & Permeable Bases #89 Stone is the ⅜"-top crushed granite that contractors specify by name for permeable paver joints, walkway finishes, and tight-pack drainage layers. Native Boston-area granite, angular, washed, with a tight ASTM C33 / AASHTO M43 No. 89 gradation — small enough to lock pavers, large enough to drain. If a permeable-pavement detail calls for "#89 joint stone," this is it. At a glance Spec name #89 Stone (ASTM C33 / AASHTO M43 size No. 89) Material Crushed granite, native to the Boston area Nominal size ⅜" to fine (passes ½" sieve, retained on #50) Composition Angular crushed granite, washed, clean of fines below #50 Weight ~2,800 lbs per cubic yard (~1.4 tons) Coverage 1 yd³ covers ~80 sq ft at 4" depth Also known as 89s, AASHTO 89, joint stone, chip stone, permeable paver joint fill, ⅜" clean Sold by The cubic yard, bulk dump truck delivery What it's good for Permeable interlocking paver joints (the spec'd "#89 joint stone") Permeable paver leveling course (top of the open-graded base) Walkway finish layer over a compacted base Fine drainage stone near foundations and small culverts Septic system top dressing Decorative ground cover where a small, uniform stone is wanted Gradation (ASTM C33 / AASHTO M43 — Size No. 89) Sieve size % passing ½" (12.5 mm) 100 ⅜" (9.5 mm) 90 – 100 #4 (4.75 mm) 20 – 55 #8 (2.36 mm) 5 – 30 #16 (1.18 mm) 0 – 10 #50 (300 µm) 0 – 5 How much do I need? For permeable paver joints, plan on about ½ cubic yard per 200 sq ft of paver field (after sweeping). For a 2" leveling course over an open-graded base, plan on about 1.2 yd³ per 200 sq ft. Use the material calculator at the top of the page for custom dimensions, and round up 5–10% for spread loss and re-sweep. How #89 compares to neighboring sizes #89 vs. #8: #8 is slightly larger (no #50-fines portion). #89 is the more common joint spec; #8 is the more common bedding spec. #89 vs. #57: #57 is the 1"-top sibling. Use #57 below #89 in a permeable system. #89 vs. stone dust: Stone dust (#10) has more fines and packs tight. #89 drains. They are not interchangeable for permeable installs. Residential equivalent: Same material as our Gray Crushed Rock ⅜" — two ways to ask for the same product. Frequently asked questions What is #89 stone used for? Primarily three jobs: filling the joints on permeable interlocking pavers (PICP), the leveling course directly under permeable pavers, and small-stone drainage near foundations or septic systems. It is the spec'd choice when "#89 joint stone" appears on a plan. Can I use #89 in regular pavers (non-permeable)? For traditional pavers, use polymeric sand for joints and concrete sand for bedding. #89 is the right call for permeable systems only. How does #89 differ from #8 stone? #89 includes more of the fine-end material (passes through #50 sieve at 0–5%). #8 has a narrower, slightly larger band. Most PICP details accept either, but #89 is what most permeable spec sheets call out. How much does a cubic yard of #89 stone weigh? About 2,800 lbs per cubic yard, or roughly 1.4 tons. Do you deliver #89 stone in the Boston area? Yes — same-day and next-day bulk delivery across Suffolk, Middlesex, Norfolk, and Plymouth Counties. No minimum order; flat-rate delivery shown in the price breakdown. Same-day and next-day bulk delivery, no minimum order. We deliver #89 stone across Suffolk, Middlesex, Norfolk, and Plymouth County. Pair with our #57 Stone as the open-graded base layer below, or our Concrete Sand for traditional paver bedding. Order today — the spec'd joint stone for permeable paver systems.