Asphalt Paving Contractor in Kansas City

Standard commercial parking lots require 3 inches of hot-mix asphalt over 6 inches of compacted aggregate base course. Heavy truck areas need 4-5 inches of HMA with specialized Superpave mix design for durability. Loading docks and dumpster pads often get 6 inches to handle concentrated weight. The aggregate base course thickness depends on soil conditions—Kansas City's clay soils typically need 8-10 inches for proper support. Each layer gets compacted to 95% density using vibratory rollers. Nuclear density gauge testing confirms compaction rates meet specifications before proceeding. These thicknesses assume proper drainage and no unusual loading conditions.

Overlaying existing asphalt works only when the base remains structurally sound. We core sample the existing pavement to check thickness and base condition first. If testing reveals solid aggregate base course with minimal cracking, a 2-inch overlay after milling might work. However, most 20+ year old commercial lots in Kansas City show base failure from freeze-thaw cycles. Paving over failed base just transfers cracks through the new surface within 12-18 months. Alligator cracking, rutting, or pumping indicate complete removal is necessary. The cost difference between overlay and full replacement often justifies doing it right. Overlays also raise pavement elevation, potentially causing drainage issues and ADA compliance problems at sidewalks and entrances.

Site preparation starts with saw-cutting and removing existing pavement down to native soil. In Jackson County's clay soils, we often excavate 14-16 inches deep to accommodate proper base installation. Subgrade gets proof-rolled to identify soft spots requiring undercutting. Any underground utilities need marking and protection. We establish final grades using laser-guided equipment to ensure 1-2% cross-slope for drainage. The aggregate base course goes down in maximum 4-inch lifts, with each lift compacted to 95% density. Fabric separation layers might be necessary in extremely poor soils. Storm sewer connections, catch basin adjustments, and concrete collar pours happen before base installation. Edge restraints along concrete walks prevent future pavement migration. Every preparation step affects long-term pavement performance.

Fresh asphalt needs 24-48 hours before striping application, depending on thickness and weather conditions. The surface temperature must drop below 100°F for paint adhesion. In Kansas City's summer heat, this might take two full days. Thermoplastic striping requires surface temperature between 50-80°F for proper bonding. We recommend keeping traffic off completely for 72 hours to prevent power steering marks and premature wear. Light vehicle traffic can resume after striping dries—usually 30 minutes for waterborne paint. Heavy trucks should wait 5-7 days for full curing. Hot weather accelerates curing, while cool fall temperatures slow the process. Premature loading causes permanent deformation in fresh asphalt. The nuclear density gauge confirms when compaction has stabilized enough for normal use.

Platinum Paving provides a 1-year workmanship warranty on all new asphalt installations. This covers defects in materials and installation, including premature cracking, improper drainage, or compaction failures. The warranty excludes damage from overweight vehicles exceeding design specifications, snow plow damage, or chemical spills. Regular maintenance like sealcoating and crack filling helps protect your investment beyond the warranty period. We document pavement density readings and mix design tickets for every project. If warranty issues arise, Joe Brogoto personally inspects the concern and authorizes repairs. Most pavement failures happen in the first winter due to freeze-thaw cycles—our installation methods specifically address Kansas City's climate challenges. Proper base preparation and achieving 93% mat density prevents most warranty claims.