Asphalt Coverage at 1.5 Inches Thick

An inch and a half of compacted hot mix covers about 110 square feet per ton at 145 pounds per cubic foot. One thousand square feet is about 9.1 tons. That overlay is a planning estimate, not a structural rebuild. The plant ticket is the real weight.

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Between a skim and a surface course

Resurfacing quotes often name an inch and a half, and the coverage sits between the one-inch and two-inch rules of thumb. About 166 square feet per ton at one inch, divided by 1.5, is about 110 square feet per ton. On a round 1,000 square foot area, 1,000 times 1.5 times 145 divided by 24,000 equals 217,500 divided by 24,000, which is 9.0625, or about 9.1 tons. Divide 1,000 by 110 and you land near 9.1 as well. Both paths use 145 pounds per cubic foot of compacted hot mix. This is a planning estimate. The plant ticket is the real weight. Say 1.5 inches in the same breath as 9.1 tons so the figure is not later reused for a thicker driveway mat.

An overlay is not a rebuild

A 1.5-inch overlay needs a stable pavement underneath. It can refresh a sound surface and correct mild shape. It cannot replace a base that pumps or a mat that has already broken into pieces. If the old driveway flexes, the new inch and a half will flex with it. Order from the average thickness, not the thinnest spot on a high crown. Low spots, wheel ruts, and a settled gutter may take more than 1.5 inches while the ridge takes less. A straight board and a few depth checks will show whether the average is really 1.5 or closer to 2. Recalculate if the average moves. The extra depth in the dishes is real tons, and the flat 110 square foot rule will under-order a wavy drive.

Read the quote as area plus depth

Ask whether 1.5 inches is the compacted finish over the whole rectangle or a minimum that the crew will exceed in the holes. Those are different orders. A proposal that only says overlay, with no inches, cannot be converted to tons. Multiply the measured square feet by 1.5, then by 145, and divide by 24,000 once the depth is confirmed. Add the flare and any widened apron as their own areas. Hand work along a curb can finish thicker than the screed setting. After the pour, divide the ticket tons into the measured area and see what thickness that implies. If it is far from 1.5 inches, the shape or the depth changed. The scale, not the advertisement for an overlay, is the weight you bought.

A practical sequence

Plan about 110 square feet per ton, or about 9.1 tons per 1,000 square feet.
Order from the average thickness where the old pavement is rutted.
Treat 1.5 inches as a resurfacing depth on stable pavement.
Keep the tons a planning estimate and match them to the plant ticket.

The mistake to skip

Ordering from the thinnest spot and calling that average a 1.5-inch overlay.

Questions people ask

How many tons is 1,000 square feet at 1.5 inches?

About 9.1 tons. Multiply 1,000 by 1.5 by 145 and divide by 24,000. The result is 9.0625, stated as about 9.1. That uses a planning density of 145 pounds per cubic foot for compacted hot mix. Ruts that take extra depth will raise the load. The plant ticket is the real weight.

Can a 1.5-inch overlay fix a failed base?

No. The thickness assumes the pavement under it is stable. Coverage math only turns area and depth into planning tons. If the base pumps or the old mat is broken up, a thin overlay will follow that movement. Ask what is under the new layer before you convert 1.5 inches into an order.

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