Roofing Tear-Off Dumpster Sizing Guide | Dothan, AL

A roof tear-off is the one job where dumpster math actually bites people. On a cleanout or a kitchen gut you eyeball the pile and volume runs out first. Shingles don't behave that way. A layer of tear-off that looks like almost nothing, knee high in the front of the box, is already two tons. I've stood in a driveway off Ross Clark Circle and watched a crew fill a 30-yard box a third of the way up and hit the legal haul limit with a whole slope still nailed to the house.

So this is the arithmetic we run before sending a box out: squares, pitch, layer count, felt, decking, and what all of it weighs once it lands in steel. The number that matters at the end is pounds, not cubic yards. Get the pounds right and the box shows up once, leaves once, and nobody argues about an overage.

Dothan makes it harder in two ways. First the sun — Alabama heat and humidity cook asphalt shingles hard, and a 25-year three-tab on a south-facing slope in Houston County often gives up around year 15. Second, layers. Plenty of older in-town houses inside the Circle and out along US-84 carry two, and I still find three on 1960s ranches. Between hail, straight-line winds, and the damage Hurricane Michael pushed inland in 2018, a lot of roof around here got covered over instead of removed.

Start With Squares, Not Square Feet

Roofers price and order in squares. One square is 100 square feet of roof surface, so a 30-square roof is 3,000 square feet of shingle — not 3,000 square feet of house. Your roof is bigger than your footprint because it's sloped and because of overhangs. The quick method:

1. Take the ground footprint including the attached garage and any porch under shingle. Call it 1,800 sq ft.
2. Multiply by the pitch factor. A 4/12 is about 1.05, a common 6/12 gable about 1.12, an 8/12 about 1.20, a 10/12 about 1.30.
3. Add 8–10% for eave and rake overhang, valleys, and waste.

So 1,800 × 1.12 × 1.09 = about 2,200 sq ft, or 22 squares. That's a typical Wiregrass ranch. A two-story in Headland or a spread-out brick ranch outside Ashford runs 28–35. If a contractor already quoted the job, skip all this and ask him for his square count — he measured it.

What a Square Actually Weighs

Here's the part that surprises people. Per square, roughly:

• Three-tab shingles: 210–250 lbs
• Architectural / dimensional shingles: 320–400 lbs (heavier laminated ones push 430)
• 15 lb felt: ~30 lbs per square; synthetic underlayment is lighter, 10–15 lbs
• Ice-and-water at valleys and eaves: 25–35 lbs per square of coverage
• Old drip edge, flashing, boots, ridge vent: 15–40 lbs per square
• Decking, if you're replacing it: 7/16" OSB runs about 46 lbs a sheet, roughly 145 lbs per square

Work with 380 lbs per square per layer for architectural with felt and trash, and about 280 lbs for old three-tab. Those are the numbers I pick boxes with, and they hold up. Re-sheeting is a separate add — another 140–150 lbs per square.

Layers Are the Multiplier That Wrecks Budgets

Two layers doesn't mean a little more. It means double. Three means triple. Everything else here is rounding error next to layer count, and it's the most common reason a job goes over tonnage.

Check before you order, not on tear-off morning. Three ways:

• Look at a rake edge or gable end from a ladder. The stack shows in cross-section — each layer a distinct band about 1/4" thick.
• Lift a shingle at a plumbing boot or where flashing meets the wall. What's underneath tells you everything.
• Check the drip edge. If the roof plane sits proud of the trim, or the eave looks thick and lumpy, somebody laid over.

A 22-square roof with one layer of architectural is about 8,400 lbs — 4.2 tons. Two layers, 16,700 lbs, over 8 tons. That's not a bigger dumpster. That's a second dumpster or a mid-job swap, scheduled before the crew starts stripping.

Sizing Table: Squares × Layers

Estimates assume architectural shingles with felt at ~380 lbs per square per layer, no decking replacement. Old three-tab, take about 25% off. These are the boxes we send on tear-offs around Dothan.

Notice what isn't in that table: a 30-yard box, anywhere. That's deliberate. For the general-purpose version of this exercise on non-roofing work, see our guide to choosing a dumpster size in Dothan.

Why a 30-Yard Box Is Usually the Wrong Call

A 30-yard roll-off feels like the safe pick. More room, less worry. On a tear-off it's the opposite, because shingles are one of the densest loads we handle — same neighborhood as concrete, brick, and dirt.

The truck has a legal gross weight, and that limit doesn't move when the box gets bigger — the empty box just weighs more and eats your payload. You hit the ceiling with a 30-yard less than half full, paying for capacity you can't legally use. Worse, an operator who doesn't know shingles lets a crew load it deep and then can't haul it. Now somebody's in the box pitching shingles back out in August.

A 20-yard is the workhorse tear-off box: 22 ft of loading length, walls low enough to pitch into off a ladder, a footprint that fits a normal Dothan driveway. For small roofs, garages, and porch re-decks the 15-yard is plenty. When tonnage is large the answer is a second box or a same-day swap, not a taller one — that's how we run roofing accounts.

Keep It a Shingle-Only Load

Ask for a dedicated shingle load and keep it clean. Asphalt shingles are often accepted as a separate stream for recycling into road base — see the EPA's guidance on construction and demolition materials — but the moment framing lumber, siding, gutter, or a few bags of household junk go in, the whole box is mixed debris.

Practical rule: shingles, felt, nails, and old flashing in the roofing box. Plywood offcuts, pallets, wrappers, soffit tear-out — separate can, or it waits. If a job needs both we'll bring a small second box, which beats contaminating six tons of clean shingle. Unsure either way? See what can and can't go in a dumpster in Alabama.

Placement for a Roofing Crew

Where the box sits decides how fast the crew works. Tell us the plan when you book — placement is free, moving a loaded box is not.

• Close to the eave, on the gable end. Shingles come off downslope. A box under the low edge of the biggest slope, or off a gable so it catches two planes, saves hours of wheelbarrow work.
• Protected drop zone. Tarps or plywood between the eave and the box catch the strays. Nails end up everywhere on a tear-off; a magnet sweep at the end isn't optional.
• Plywood under the wheels and rails. Dothan driveways bake all summer and hot asphalt marks easily. We carry boards — more in our driveway protection write-up.
• Clear the truck's approach. We need roughly 60 ft of straight backing room and 23 ft of overhead clearance to raise the hoist. Trim the crepe myrtle, move the boat, mention a septic field.
• Mind gutters, AC units, and overhead lines. Never under the service drop, and off the irrigation heads and flower beds.

Loading Technique — and Why a Heaped Box Gets Rejected

Load heavy material low and spread it front to back, centered over the rails. A pile jammed against the back door puts the weight behind the axle and makes the box a fight to winch on. Break big mats up instead of sliding whole sheets in — they bridge and settle unevenly.

And keep it level with the top rail. A heaped box can't be tarped, and an untarped load is illegal to haul on US-231, US-431, or anywhere else. If we arrive to a mound, the driver either waits while somebody knocks it down or leaves without it. Neither is fun in July. The National Roofing Contractors Association is a solid reference on tear-off practice; our rule is simpler — nothing above the rails, ever.

Storm Damage and Insurance Jobs

Wiregrass roofs get replaced on claims more often than on schedule. If yours is an insurance job, document before anything goes in the box: photos of every slope, close-ups of hail bruising or creased tabs, the exposed decking once the shingles are off, any rot at valleys or penetrations. Once it's hauled it's gone as evidence. Keep a few damaged shingles aside for the adjuster.

And be careful with the storm-chaser outfits that turn up in Dothan, Enterprise, and Ozark after every hail event. A local crew and a local box mean somebody's still here in two years. We're based on E Southport and cover the whole Wiregrass, from Rehoboth and Taylor out to Headland, Abbeville, Slocomb, and Midland City.

Schedule Around the Afternoon Storms

Alabama summer means a pop-up thunderstorm most afternoons between 2 and 6. An open box takes on water fast, and a soaked load gains 8–12% — on six tons that's another 1,000 lbs you're paying for. Two habits fix it: tarp the box any night the load stays out, and time the haul so a full box leaves the day the crew finishes, not Monday after a wet weekend. For how tonnage and flat rates work, see our Dothan pricing breakdown.

Tell us your square count and your layer count, and we'll tell you the box — no guessing, flat rate, driveway protected, delivered same day or next morning across Houston County and the Wiregrass. Call Big Joey's Dumpster Rental at (334) 336-0388 and talk to somebody who's dropped boxes for roofing crews around here for years.