Roofing

Sizing a Dumpster for a Roof Tear-Off in Tangipahoa Parish

Roofing is where sizing goes wrong most often, and it is always the same mistake: sizing by how the pile looks instead of what it weighs.

The one number that matters: squares

Roofers measure in squares. One square is 100 square feet of roof surface. A typical single-storey house around Hammond is somewhere between 20 and 35 squares depending on footprint and pitch; the larger properties out toward Covington and north Mandeville can run well past 50.

If you do not know your square count, your roofer does, and it is the first thing to ask. Everything downstream — container size, weight allowance, whether you need a swap — follows from it.

What a square of roofing weighs

Run the arithmetic. A 28 square architectural shingle roof at 350 lb per square is roughly 9,800 pounds — just under five tons before underlayment. That is already at or past the included allowance on a 20 yard.

Shingle sizing table

Note the wording on the 25-35 row. A 20 yard has the volume for that job comfortably. It is the weight allowance you need to watch, which is why we quote the overage rate and often suggest the 30 for the top end of that band.

Metal roofs are a different problem

Metal roofing is common across the rural parts of this parish — barns, outbuildings, farm houses and an increasing number of new residential builds. It flips the usual sizing logic completely.

Metal is light. A 30 square metal roof might weigh under two tons, which is nothing. But the panels are long, awkward and full of air, and a container of loose metal sheeting fills up astonishingly fast while weighing almost nothing. So for metal you size by volume, not weight — go bigger than the tonnage suggests.

Two practical notes. First, flatten or nest the panels as you load, or you will waste half the container on empty space. Second, if the volume is substantial, metal roofing is scrap with real value — pulling it out as a separate stream can offset a meaningful part of the job cost.

The second layer problem

Plenty of houses around here have a second layer of shingle laid over the original. It roughly doubles the tear-off weight, and people often do not know until the crew is up there.

Two practical steps: look at the rake edge from the ground, where a double layer is frequently visible as a thicker band, and ask your roofer to confirm during the inspection. If it turns out on the day, call us — a swap-out mid-job is straightforward and far cheaper than an overloaded container that cannot be hauled.

Decking, wet sheathing and the extras

Three things routinely add volume nobody budgeted for.

Rotten decking. Roofs in this climate that have leaked, particularly around valleys and penetrations, often need sheathing replaced. You will not know how much until the old material is off. Budget headroom.

Wet insulation. After a long-term leak or storm damage, saturated attic insulation may come out too. It is heavy and bulky, and in our humidity it will be mould-affected by the time you get to it.

Old flashing, vents and boots. Small individually, meaningful in aggregate on a complex roof.

A practical note that is not about the container at all: a tear-off sheds an enormous quantity of nails. A magnet sweep of the driveway, lawn and street at the end of the job is twenty minutes well spent, and it is the single most common complaint homeowners have about roofing work.

Placement: where the container should actually sit

A tear-off crew carrying material an extra thirty feet loses real hours over a day.

• Tight to the drip line on the elevation being torn off, so material can be dropped or chuted directly in.
• Doors facing the approach so ground crew can walk material in.
• Clear of the eaves overhead. The truck bed needs roughly twenty-two feet of vertical clearance to tip, so low eaves, power drops and — around here especially — mature live oaks dictate how close we can actually get.
• On boards, and on firm ground. After a wet spell, a spot that looks fine can be too soft to carry a loaded container.

Storm season and booking ahead

Roofing demand here is brutally seasonal in a way that matters for scheduling. After a named storm makes landfall anywhere on this coast, roofing volume across the Florida Parishes spikes and every hauler in the region is at capacity within days. Hurricane Ida in 2021 is the reference point most people use, and the re-roofing wave from that event ran for a long time afterwards.

If you are a roofing contractor, the single most useful thing you can do is set up a standing arrangement with a local hauler before the season rather than joining the queue on the Monday after landfall. We hold capacity for contractors who work with us regularly, and we are honest during those weeks about what we can and cannot deliver.

If you are a homeowner and your roof is nearing the end of its life, doing the work outside peak season is cheaper and faster in every respect — roofer availability, material lead times and container scheduling all improve.

More on our roofing containers here, or just call and tell us the square count and the material.