When a Patio Has to Come Out
Patios fail in slow motion. Concrete slabs poured before 2000 crack into sections, sink near the house when the sub-base settles, or heave from frost. Paver patios fail when sand washes out under the joints; flagstone shifts when roots reach the bed. Past a certain point, patching stops working and the cheapest long-term fix is tear-out.
Other reasons people pull a patio: replacing concrete with pavers or stone, outgrowing the original 10×12 footprint, pre-listing prep, or returning the area to lawn after a deck install elsewhere. Tear-out projects across all four patio materials live or die by weight planning.
Step by Step: Your Patio Estimate
- Pick your patio size. Use a preset or enter custom dimensions for L-shaped or irregular patios.
- Choose patio material. Concrete slab, concrete paver, clay/brick paver, or natural flagstone. Each routes to its own density.
- Set material thickness. Default depends on material: 4 in for concrete slab, 60 mm (2 3/8 in) for pavers, 2 in for flagstone.
- Skip Base Removal unless you're removing the patio entirely back to grade or the original base has failed.
- Enter zipcode for regional pricing.
- Click Calculate. See your tonnage, dumpster type, count, and cost range.
How Much Does a Patio Weigh?
More than people think. The four common patio materials sit at 130-165 lbs/ft³ in-place: clay paver is the lightest at 130, concrete slab and concrete paver match at 145, flagstone the densest at 165. Multiply by thickness and area and the numbers climb fast.
| Patio Size | Concrete Slab (4") | Concrete Paver (2") | Clay Paver (2") | Flagstone (2") |
|---|---|---|---|---|
| Small (100 sq ft) | 2.66 tons | 1.33 tons | 1.19 tons | 1.51 tons |
| Standard (300 sq ft) | 7.98 tons | 3.99 tons | 3.58 tons | 4.54 tons |
| Large (500 sq ft) | 13.29 tons | 6.65 tons | 5.96 tons | 7.56 tons |
| Oversized (1,200 sq ft) | 31.90 tons | 15.95 tons | 14.30 tons | 18.15 tons |
Paver weights shown at a clean 2" reference. The calculator's residential default is 60 mm (2 3/8"), which produces about 18% higher weights for the same square footage.
Even a small 100 sq ft concrete patio crosses the Low-Boy threshold at 4 inches thick; a standard 300 sq ft patio crosses it across every material mode. We recommend sizing by weight, not by visual volume: pavers and flagstone look lighter because they come up in individual pieces, but per-square-foot density is comparable to concrete.
Why Standard Dumpsters Don't Work for Most Patios
A 20-yard standard dumpster has a 6-ton structural cap, but most haulers cap heavy material at 2-3 tons because their truck axles aren't rated for more. The 10-yd Low-Boy solves this: lower walls, reinforced steel floor, 10-ton rating, flat-rate $400-$600 per load with no overage math.
We recommend asking the provider for a 10-yd Low-Boy by default on any patio past 100 sq ft, even if their website lists a 20-yard as concrete-rated. Confirm the Low-Boy accepts your specific material; most do, but a few run separate concrete-only and brick-only containers.
The Base Question
Pull the base only if it has failed (sinking, washout), you're regrading back to lawn, or you're switching to a material that needs a deeper base. Removing it unnecessarily can double or triple the Low-Boy count. We recommend keeping the base unless a contractor has flagged it as failed.
How We Calculate Your Estimate
Weight-first, physics-based. We compute patio weight from area, thickness, and material density, optionally add base weight (sand and aggregate), then convert to dumpster volume using in-dumpster densities and a bulking factor.
Patio Material Weight:
Weight = Area (sq ft) × Thickness (in) ÷ 12 × Density × 1.10 buffer
145 lbs/ft³ for concrete (NRMCA standard residential), 130 for clay paver (BIA Technical Note 3A midpoint, range 120-140), 165 for flagstone (Wicki Stone bluestone/limestone figure). The 10% buffer covers edge details, mortar joints, embedded edge restraints, and concrete edge curbing that surveys typically miss.
Base Weight (when included):
Sand = Area × 1 in ÷ 12 × 100 lbs/ft³
Aggregate = Area × 5 in ÷ 12 × 130 lbs/ft³
Sand at 100 lbs/ft³ loose masonry sand (industry range 95-105). Aggregate at 130 lbs/ft³ compacted dense-graded base per Caltrans and DOT references; matches the asphalt-driveway calculator.
Volume Calculation:
Volume = (Weight ÷ In-dumpster Density) × Bulking factor
Broken concrete packs at 2,025 lbs/yd³, broken concrete pavers at 2,800, broken clay pavers at 3,000 (matching the brick-removal calc), broken flagstone at 2,400 (irregular shapes pack with more voids). The 1.10 bulking factor (1.05 for loose sand and aggregate) covers packing variability between loads.
Total weight at or above 5,000 lbs routes to a 10-yd Low-Boy at flat rate; below 5,000 lbs, a standard dumpster fits and runs cheaper. The threshold reflects the practical hauler cap on heavy materials, not the structural max.
Important Considerations
Concrete Edge Restraints
Most paver and flagstone patios have concrete edge restraints or a poured curb hidden below the soil line. These come up at 50-100 lbs per linear foot of perimeter, hidden weight the visible survey misses.
Saw-Cut Before Breaking
For partial removal (leaving a section in place), saw-cut a clean break line with a diamond masonry blade before demo. A clean cut prevents the leave-in section from cracking and saves repair work later. For concrete slabs over 3 inches, rent a walk-behind concrete saw rather than using a handheld.
Call 811 for Full Base Removal
Full base removal goes 6+ inches below grade, which is where buried utilities live. Call 811 (or your state equivalent) at least 3 business days before digging to mark gas, water, electrical, irrigation, and cable lines. It's free, it's required by law in most states, and a struck utility line is a five-figure mistake.
Frequently Asked Questions
What size dumpster do I need for patio removal?
For most residential patios past a small entrance pad, you need 10-yd Low-Boy dumpsters rated for 10 tons. A standard 15 by 20 ft concrete patio at 4 inches thick weighs about 8 tons, which already exceeds a 20-yard standard dumpster's 6-ton limit. Small concrete patios under about 90 sq ft at 4 inches, or paver patios under about 180 sq ft at 2 inches, can fit in a standard 10-yard dumpster.
How much does a patio weigh?
It depends on material and thickness. A 15 by 20 ft (300 sq ft) standard concrete patio at 4 inches thick weighs about 8 tons with a 10% buffer. A 12 by 15 ft (180 sq ft) concrete paver patio at 2 inches weighs about 2.4 tons. A 15 by 20 ft flagstone patio at 2 inches weighs about 4.5 tons. Flagstone is the densest of the four common patio materials (165 lbs/ft³); clay paver is the lightest (130 lbs/ft³).
Can I put concrete or pavers in a regular roll-off dumpster?
Sometimes, but rarely. Standard dumpsters are rated for 4-10 tons depending on size, but most haulers cap heavy materials at 2-3 tons regardless of the structural max. For anything past a small entrance pad or thin-paver patio under about 100 sq ft, you'll exceed the weight cap and pay $50-$100 per ton in overage fees. Most haulers route patio debris to 10-yd Low-Boys at flat rates of $400-$600.
Does the sand or gravel base need to come out too?
Usually no. Most patio replacement projects reuse the existing base because it's already compacted and graded. Remove the sand setting bed only if you need to regrade slightly. Remove the full base only if you're returning the area to lawn, switching to a deeper application, or the original base has failed. Full base removal on a 300 sq ft patio adds about 9.4 tons of debris (2,500 lbs of sand plus 16,250 lbs of aggregate).
Can patio materials be recycled?
Concrete and clay pavers, yes. Most metro areas have concrete and brick recyclers that crush patio material into aggregate for new construction. Tip fees run $35-$75 per ton, often lower than landfill. Clean loads (no dirt, wood, or trash) get the recycling rate. Flagstone rarely has a downstream recycling market; whole pieces have resale value for garden borders, but broken flagstone usually goes to landfill.
How much does it cost to remove a patio?
The dumpster portion runs $400-$600 per Low-Boy load. A typical 15 by 20 ft concrete patio at 4 inches needs one Low-Boy ($400-$600). Larger patios or full base removal need 2-3 loads ($800-$1,800). Full project cost including labor, equipment, and hauling runs $2-$6 per square foot.
Should I salvage pavers before tearing them out?
For intact, clean pavers, yes. Facebook Marketplace, Craigslist, and Habitat ReStore take salvaged pavers, and reuse offsets dumpster cost. Pull a sample row before booking; if 80%+ come up intact, salvage is worth the labor. Broken or weather-damaged pavers go in the dumpster either way.
Reference Sources
Data sources:
- NRMCA: 145 lbs/ft³ standard residential concrete density.
- BIA Technical Note 3A: Clay paver density (120-140 lbs/ft³ range); midpoint is the 130 figure.
- Wicki Stone: 165 lbs/ft³ figure for bluestone and limestone flagstone.
- ICPI Tech Spec 2 (2020): Residential paver thickness standards (60 mm pedestrian, 80 mm driveway) and ASTM C 936 durability.
- Dropcurb Concrete Patio Removal Cost (April 2026): Contractor pricing $2-$6 per sq ft all-in; $300-$600 heavy-debris dumpster pricing.
- Hometown Dumpster Rental Patio Demolition Guide (2023): Workflow reference for demolition sequence and tools. We use NRMCA/ASTM densities for weight math; their patio-weight rule of thumb understates concrete.
Related Calculators
- Concrete Removal Calculator: Closest peer; shares Low-Boy routing logic for mixed concrete and patio projects.
- Asphalt Driveway Removal Calculator: Same heavy-material Low-Boy pattern; often paired with patio tear-out during property prep.
- Deck & Porch Removal Calculator: Outdoor-living tear-out peer; often paired with patio work.
- Yard Waste & Landscaping Calculators: Regrading and sod removal commonly follow patio tear-out.
- Brick & Masonry Wall Removal Calculator: Shared brick/stone density logic for patio walls or columns.
- The Real Weight of Concrete: Why Your Dumpster Hits the Limit First — The volume-vs-weight mismatch that catches patio tear-out homeowners off guard, with the cross-project Low-Boy fix.
- How Much Does Concrete Weigh? — Slab and paver weight by thickness for sizing a patio tear-out
Disclaimer: Estimates use NRMCA, BIA, and industry-standard densities with a 10% buffer for edge restraints and embedded curbing, but field weights can run 5-15% higher on patios with hidden patches or thicker edges. Confirm with your dumpster provider before booking; local hauler quotes are the source of truth.