Self-Leveling Overlays for Katy TX Garage Floors

Cementitious SLU vs. Epoxy SLU

Two product categories level floors: cementitious self-leveling underlayment (SLU, cement-based) and epoxy self-leveling (100% epoxy, typically 100+ mils). Cementitious SLU is less expensive ($1.50–$3/sq ft material) and suitable under epoxy coating. Epoxy SLU is more expensive ($5–$8/sq ft material) but combines the leveling and decorative functions in one product. For residential garages, cementitious SLU topped with a decorative epoxy system is the most common approach.

Installation Requirements

Self-leveling products flow to a flat surface under gravity — but they need help to reach level. A properly set perimeter screed (laser-level-established depth control) and prompt spreading with a gauge rake ensure uniform thickness. Product must be poured quickly (typically 20–30 minute working time before it stiffens) and rooms must be sealed against air drafts that cause surface skinning. We've invested in the proper equipment — this is not a good DIY project.

Bond to the Substrate

Self-leveling overlays are only as good as their bond to the existing concrete. This means the substrate must be: (1) clean and free of oil and curing compounds; (2) mechanically profiled (diamond ground) to open the surface; (3) properly primed with a primer rated for the SLU product. Failure to properly prime is the leading cause of SLU delamination. We never skip the primer step.

Thickness and Cost

Minimum SLU thickness is typically 1/4" for structural integrity; maximum single-pour depth for most products is 1". Deeper fills require multiple pours with a waiting period between them. Material cost runs $0.80–$1.50/lb depending on product; typical pour is 1 lb/sq ft/1/8" depth. A 440 sq ft garage leveled at 1/4" average depth needs roughly 880 lbs of SLU material, plus primer, plus the epoxy system on top. Full cost estimate for a settled 2-car garage: $2,500–$4,500 depending on severity.