Crack Filling and Sealing in Des Moines, IA
Crack filling seals the gaps in asphalt with flexible rubberized material so water cannot run down through them into the base, and under Des Moines pavement the base is glacial till that stays damp for months at a time. Every open crack works like a drain aimed straight at that soil. In March, which averages 15.5 freeze-thaw days at the airport station, water that reaches the till freezes, expands and lifts, then thaws into a softer layer that carries less load than before. Crack repair is an inexpensive way to interrupt that cycle, and on most drives it matters more than the sealer that follows. Filled cracks also give a sealcoat a sound surface to bridge, which is why driveway sealcoating bids should list crack work as its own line.
$1 - $3 per linear ft; most driveways $100 - $400 · full pricing guide
Pavement engineers name three ingredients for frost heave: a frost-susceptible soil with plenty of fines, subfreezing temperatures, and a supply of water. This city supplies all three. Under the common Casagrande screen, a soil counts as frost-susceptible when 3 percent or more of it passes a 0.02-millimeter sieve; Clarion till carries 18 to 28 percent clay, and clay particles are far finer than that cutoff. The freezing arrives on 124.7 nights a year. Water is the one ingredient an owner controls, and open cracks deliver it directly to the till, where ice lenses grow and push the pavement up in winter, then leave a weakened layer behind when they melt.
Not every crack gets the same treatment. Transverse cracks run across the drive and come from the asphalt shrinking in cold weather as its binder hardens; longitudinal cracks run lengthwise, often where two paving passes met. Both are classic candidates for filling. Block cracking divides the surface into rectangles of roughly one to 100 square feet, comes from binder aging and daily temperature swings, and can still be filled and sealed while the blocks stay tight. Fatigue or alligator cracking is different: small interlocking pieces over a soft spot mean the base has failed, and that section needs asphalt patching, not rubber.
Crews use two kinds of material. Cold-pour filler comes ready to apply and is common on driveways and small lots. Hot-pour rubberized sealant is melted in a kettle, sets in ten minutes or less according to SealMaster, and stays flexible as the crack opens and closes through the year. Either way the crack has to be clean and dry, blown out with compressed air, or the material will not bond. Timing is a tradeoff. Asphalt contracts in cold weather, so by late fall cracks have opened well past their summer width, a good moment to fill them ahead of the median first freeze on October 17; a spring round after the March thaw catches whatever the winter opened.
Crack work is priced by the linear foot. Angi's current figures run $1 to $3 per linear foot, with a typical driveway job between $100 and $400, and FixAsphalt lists $1 to $2 per linear foot on parking lots, where the volume brings the rate down. HomeAdvisor quotes the same work a different way, at $0.60 to $1.75 per square foot of affected pavement. The practical step is to measure: walk the drive with a tape, add up the cracks, and hold every bid against that footage. The cost page keeps these ranges next to the sealing figures.
Free quote
Cracks worth filling on a Des Moines drive
Most cracks announce themselves in spring, when snowmelt has run through them for a season. These are the ones that need filler before the next winter.
- Straight cracks running across the drive every several feet
- A long seam down the middle where two paving passes met
- Grass or weeds growing up out of a crack
- Crack edges crumbling into loose stones
- Cracks that look wider in November than they did in July
- A dark, damp line that stays wet after the rest has dried
Any crack wide enough to hold water is worth filling before winter. Cracks that branch into a web of small pieces are a different problem, one for patching.
Fill it, patch it, or rebuild
The type of crack, not its length, decides the fix.
Fill and seal
Isolated transverse or lengthwise cracks, tight block cracking and firm edges. Clean, fill with hot-pour or cold-pour material, and seal the drive once the filler has set.
Fill now, seal later
The surface is still dark but winter opened new cracks. Fill them before the October freeze and schedule the sealcoat for the following summer, when the whole drive is ready.
Cut out and patch
Alligator cracking over a soft spot, or cracks surrounding a dip where water stands. The base under that section has failed; it needs saw-cutting, new stone and hot mix before any filler or sealer.
Crack Filling and Sealing FAQs
Is crack filling worth doing without sealing the same year?
Yes. The filler does the water-blocking work on its own, and sealing can follow in a later season. On a drive that is still fairly dark but opened a few transverse cracks over the winter, filling them before the next October freeze keeps meltwater out of the till through another 80 or so freeze-thaw days. When the whole surface turns gray a year or two later, the sealcoat goes over cracks that are already closed.
Why did a filled crack open again after one winter?
Usually because the crack is still moving. Transverse cracks open in cold weather and close in heat, and a filler that was too stiff, applied too thin, or laid into a damp crack can pull away from one edge. Hot-pour rubberized material is chosen for its flexibility. A crack that keeps widening, or one sprouting new branches along its sides, can also point to a soft base underneath, and that calls for cutting out and patching the section rather than filling it again.
Can cracks be filled in the middle of winter?
Rarely well. January's normal high at the airport station is 31.0 degrees, and a crack packed with ice or damp grit will not bond with filler. The proper fill waits for dry weather: late October, before the ground freezes, or April, once the March thaw has passed and the pavement has dried out. A crack that shows up in January is worth photographing and measuring so it goes on the spring list.
Related Services in Des Moines
Free Crack Filling and Sealing Quote — Des Moines
Free quote