One of the defining factors in professionally applied garage floor coatings is the surface preparation. While DIY kits are often applied after just broom cleaning or acid etching the concrete, professional coatings are generally applied after mechanically diamond grinding or shot blasting the concrete floor surface. So which surface preparation process do we use and why?
Most of the time, we diamond grind
For most garage and commercial projects, we utilize mechanical diamond grinding for our surface preparation. Here’s why:
- If we are removing existing coatings, our diamond grinders can remove the coatings faster and with less mess than with shot blasting.
- Our shot blaster cannot get as close the wall as our grinders.
- Shot blasting is noisier and creates more cleanup than grinding with our attached dust vacuums.
- If shot blasting, we often apply additional primer and body coatings, which drives up the price of the installed system without any benefit to the customer.
There are some circumstances where we utilize diamond grinding for surface preparation. Typically, they include:
- We utilize blasting to remove a greater amount of a contaminated concrete surface. Often, the surface has had years of exposure to petroleum products or animal fats (cooking oils and grease).
- The floor coating system we are applying requires a CSP of 3 or higher. The most common reason being we are installing an epoxy mortar or urethane mortar system – typical in food services and commercial kitchens.
To learn more about surface preparation for floor coatings, please see: