What Happens During a Mill and Overlay

The work breaks into a few clean stages. First, milling: a large rotary cutter (the mill) grinds off the top 1 to 2 inches of existing asphalt, exposing the layer below. The milled material is hauled away and typically recycled into new asphalt at a plant.

Second, surface prep: any base-failure spots that show up after milling get attention — patched, base-rebuilt, or drainage-fixed before the overlay goes on. The exposed milled surface gets a tack coat applied so the new asphalt bonds to the old.

Third, paving: a new layer of hot-mix asphalt is paved across the entire lot, typically 1.5 to 2 inches compacted thickness. The pavers and rollers work the same way they would on new construction.

Fourth, striping: after the new asphalt cures briefly, the lot is re-striped per the existing layout (or an updated layout if requested).

Mill and overlay is the right choice when the base is still sound but the surface has worn out. The typical situation: a commercial lot 12 to 20 years old with extensive surface cracking, fading, isolated potholes, and an overall tired look — but no widespread alligator cracking, no significant settling, no major drainage problems.

In those conditions a mill and overlay typically extends the lot life by 12 to 18 additional years at 40-60% of full replacement cost. It's the highest-ROI rehabilitation method when the base is still doing its job.

Mill and overlay does not fix base problems. If alligator cracking covers wide areas, the pavement flexes under load, sections have settled, or drainage is fundamentally wrong, milling and replacing the surface will buy a few years and then the same problems return.

In those conditions full-depth reclamation (where the existing pavement is pulverized and re-stabilized in place) or full replacement is the better long-term value. An honest assessment tells you which side of the line your lot is on.

Sealcoating protects an existing surface — it does not add structural material. Sealcoating extends life by 5-10 years on a sound lot. Mill and overlay replaces structural surface material — extending life by 12-18 years. Full replacement (or full-depth reclamation) rebuilds the base — extending life by 20-25+ years.

The right choice depends on what is actually wrong. A sound lot needs sealcoating. A surface-failed lot needs mill and overlay. A base-failed lot needs replacement or FDR.

A typical commercial mill and overlay project runs 3 to 7 working days for a small-to-medium lot, longer for larger properties. The lot can be milled in one or two days, then the overlay paves over one or two more days, then a brief cure and striping.

We phase the work to keep your business operating: milling and paving one section at a time so part of the lot stays open. Schedule typically works around tenant peak hours and any specific operations on site.