Coating Removal and Surface Preparation — Laying a Foundation for Years of Trouble-free Service
As many as 80% of floor-coating failures result from inadequate surface preparation.
McLean Flooring Solutions brings years of training and experience in surface preparation to every job. Of course, excellent surface preparation is fundamental to our epoxy and urethane resurfacing installations and to our concrete polishing work.
We rely on a variety of materials and methods — analyzing surface, intra-surface, and subsurface conditions, and factoring in budgetary and regulatory realities and environmental concerns — to create the best solution for your resurfacing job.
Here are some basic preparation steps:
Examine the Surface
We’ll check the surface for barriers such as existing sealers, curing materials, grease, oil, efflorescence, and dirt that must be removed. If appropriate, we send out old tiles and adhesives for lab testing of hazardous materials to protect your workers and ours.
Evaluate Painted Surfaces
If paint is peeling or degrading in any way, it must be completely removed.
Repair Surface Defects
Remove any loose concrete; clean and fill holes, cracks, and other surface defects. Typically, for example, we V-cut all cracks and fill expansion joints and cracks with an elastomeric to prevent their reappearing thru the new surface.
Test the Concrete
A “water drop” test can be used to determine if a surface is clean. We use Wagner Electronics “Rapid RH” concrete moisture tests to determine relative humidity.
Clean Uncoated Concrete
Remove any chemicals, oil, grease, or other foreign substances.
Here are some techniques we employ to create an ideal bonding profile on concrete:
Shot-blasting is the preferred method for creating an ideal bonding surface for epoxy, polycrete, and Methyl Methacrylate (MMA) floors. Shot-blasting triples the bonding surface profile for a seamless floor.
Diamond grinding is applied to the edges of a floor or in open areas requiring a smoother profile when a thin mil system is installed.
Scarifying employs cutters (toothed washers) operating with a rotary action. The cutters impact the concrete surface at a right angle, fracturing or pulverizing the top surface of the concrete and exposing a clean, fresh surface.