One of the biggest advantages of interlocking tiles over epoxy is their tolerance for imperfect concrete. But how uneven is too uneven? Here’s what you need to know.
What Tiles Can Handle
- Minor cracks: Hairline and small cracks (up to 1/4″) — tiles span right over them
- Surface roughness: Broom-finished, troweled, or slightly pitted concrete is fine
- Slight slopes: Gradual slopes for drainage (up to 2%) work perfectly with interlocking tiles
- Minor height variations: Gradual height differences up to 1/4″ over 4 feet are acceptable
What Needs Attention First
- Heaving or shifting slabs: Large height changes (>1/2″ step) at slab joints should be ground down
- Standing water: If water pools when it rains, address drainage before installing tiles
- Severely spalled concrete: Loose, crumbling concrete should be patched with a leveling compound
The Tile Advantage
Unlike epoxy (which requires a perfectly clean, profiled surface) or vinyl (which telegraphs every imperfection), interlocking tiles have a raised base grid that bridges minor surface irregularities. This is one reason installation takes hours instead of days.
Moisture from Below
PP tiles are moisture-impervious and have an air gap beneath the surface. Concrete moisture — a common problem in older garages — passes harmlessly beneath the tiles without causing damage.
