Asphalt Crack Repair in Leesburg, VA

Hot-Pour Rubberized Crack Sealing

The professional standard for linear cracks up to 1" wide. Crafco Ultraseal or Flex-A-Fill 9075R is heated to 350–400°F in a direct-fire or oil-jacketed melter and poured into the prepared crack. Applied at ½" below the surface, sanded flush.

Yield: approximately 100 linear feet per 12.5 lbs for cracks ≤½" wide. Elastic recovery >60% per ASTM D5329 — the only crack product that stays flexible through a Virginia winter.

Alligator Crack Reconstruction

Alligator cracking — the interconnected scale-pattern cracking that indicates base failure — cannot be sealed. The failed section is saw-cut with clean square edges, removed, the aggregate base rebuilt with fresh VDOT 21A material, and SM-9.5A hot-mix asphalt placed and compacted to match the surrounding surface. This is a permanent repair.

Any contractor who claims to seal alligator cracking is misleading you.

Wide Crack Repair with Backer Rod

Cracks wider than 1" require a polyurethane backer rod installed at the proper depth-to-width ratio before hot-pour application. The backer rod controls sealant depth and creates the correct three-point adhesion geometry that allows the seal to stretch and recover without debonding. Skipping the backer rod on wide cracks results in premature sealant failure in the first winter.

Edge Crack & Raveling Repair

Edge crumbling at the driveway perimeter is typically caused by insufficient lateral support. Hot-pour sealing stabilizes edge cracks up to 1" wide. For severe edge breakup where material is crumbling away in chunks, the edge section must be saw-cut, base-repaired, and hot-patched with SM-9.5A to rebuild structural integrity before sealing.

Common in Loudoun County's wooded neighborhoods where tree roots exert lateral pressure.

Cracks Wider Than 1/4 Inch

A crack that has widened to 1/4" is actively admitting water with every rain event. In Loudoun County's climate, that water will freeze inside the crack 30–40 times per winter — each freeze expanding the crack by another fraction. Cracks at 1/4" are still easily sealed with a single hot-pour pass.

By the time they've reached 1" width after a second winter, they require backer rod and more material. The cost differential: $1–$2 per linear foot now vs. $3–$4 per linear foot next year.

New Cracks Visible After Winter

Cracks that appeared or significantly widened over the winter are an urgent sign — they've already been through one freeze-thaw expansion cycle. Spring is the ideal time to seal them: the crack has opened to its widest post-winter state, temperatures are rising toward the 40°F minimum required for hot-pour application, and sealing now prevents the crack from going through another summer of UV-driven oxidation before the next winter. Don't defer spring crack repair to fall.

Edge Cracking and Perimeter Raveling

Cracks at the driveway edge — where the pavement transitions to soil, lawn, or a border — are under constant lateral stress from the soil on either side. Edge cracks tend to progress faster than interior cracks because they lose lateral support as the adjacent soil erodes. Early-stage edge cracking (cracks up to 1" wide along the perimeter) can be sealed with hot-pour.

Once the edge has crumbled away in chunks — blocks of asphalt separating from the body of the driveway — section repair is required before sealing.

Linear Cracks Spanning the Width

Transverse cracks that run all the way across the driveway — perpendicular to the direction of travel — are typically caused by thermal expansion and contraction stresses in the asphalt surface. They're common in driveways that weren't sealcoated during the first few years, allowing UV oxidation to make the binder brittle. These linear cracks are ideal candidates for hot-pour sealing before they connect with adjacent cracks and begin forming the alligator pattern that indicates base failure.

Cracks with Vegetation Growing In

Grass, weeds, or moss growing out of driveway cracks mean the crack has been open long enough and is wide enough for organic matter to take hold — typically 3/4" or wider. Plant roots exert significant lateral pressure on crack walls as they grow, accelerating the widening process. Vegetation inside a crack also retains moisture, keeping the crack wet longer than open cracks and worsening freeze-thaw damage.

Clear the vegetation and seal the crack before the roots go deeper and force a section repair instead.

Before Scheduling Sealcoating

Sealcoating over unsealed cracks is one of the most common driveway maintenance mistakes. Sealer applied over an open crack bridges it with a thin film that re-opens at the first hard freeze — by spring, you have a cracked sealcoat that looks worse than before. The correct sequence is always: crack repair first, allow 1 hour to set, then sealcoat.

Leesburg Asphalt combines crack fill and sealcoating in a single visit when both are needed, saving a mobilization charge and ensuring the right sequence every time.