A new coating cannot be applied over a failing old coating — the old material must come off completely. Contractors in our network remove peeling, bubbling, or delaminated garage floor coatings for homeowners and businesses throughout Knoxville and Knox County before installing the new system.
Knoxville sits in the Tennessee Valley between the Cumberland Plateau and the Great Smoky Mountains, on a mix of shaley limestone and river-terrace soils along the Tennessee and Holston rivers. The older housing stock in Fourth and Gill, Old North Knoxville, and Bearden dates to the early 1900s, with detached garages frequently retrofitted decades later onto unlevel, hand-poured slabs. Knoxville's elevation and valley position mean sharper winter freezes than Nashville or Memphis see, and the freeze-thaw cycling that follows every cold snap off the mountains is hard on unsealed or poorly bonded concrete. Newer subdivisions built up the ridgelines toward Farragut and West Knoxville sit on graded fill that can settle unevenly, cracking slabs that were coated before the ground fully stabilized. Steep grades common around Knoxville also mean garages take more grit and moisture tracked in off gravel driveways than flatter cities in the state.
Why Old Coatings Must Come Off
Applying a new coating over a failing old coating transfers the adhesion problem — the new coating bonds to the old coating, which is not bonded to the concrete. The result is that both layers fail, usually sooner than the original coating did. Proper removal and preparation is the only way to ensure the new coating achieves the mechanical bond with the concrete that makes it last.
How Old Coatings Are Removed
Diamond grinding removes failing coating material and profiles the concrete surface simultaneously. This is faster than chemical stripping and produces a better surface profile for re-coating. Once the old material is removed and the concrete is profiled, the floor is ready for new coating installation. Your contractor will assess the concrete condition after removal and flag any cracks or spalls that need repair before the new system goes down.
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Call (615) 882-1954This content is reviewed by the Tennessee Garage Floor Coating editorial team and informed by licensed-contractor sourcing, manufacturer documentation, and established industry standards for Garage Floor Coating. Read our editorial standards.