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The right answer depends on the concrete condition, age and moisture. The standard fix is diamond abrading with a surface grinder or a heavy-duty hand grinder fitted with a coarse metal-bond abrading disc, which knocks down the peaks and texture in a few passes. Yes - you can even coarse, sharp concrete without replacing it.
For machine-matched tooling, browse our Diamond Trapezoid Grinding Disc (JOY-TP-R3) for Floo... range.What this means on site.
Reddit and flooring crews forums regularly ask whether a coarse slab can be "resurfaced" with grout or a self-leveller.
The slab condition drives every decision after this point.
Key points to understand.
This is where the concrete makes its own rules.
The background.
Understanding the material explains the symptoms.
What this means on site.
The slab condition drives every decision after this point.
A: For most jobs, For small chips, a repair mortar works. For overall roughness, patches leave proud edges and do not fix the texture - abrading is the correct solution.
A: In short, Stripping 1-3 mm of surface does not affect structural strength. Stop abrading deep grooves or exposing large aggregate if you plan to burnish.
A: The practical answer is, DIY rental costs are low (grinder + discs); professional rates are typically quoted per square metre and depend on roughness and access.
Looking for the right tool? Check our Single Rhombus Segment Diamond Trapezoid Grinding Di.... Looking for the right tool? Check our Double Rhombus Segment Diamond Trapezoid Grinding Disc.Start from the concrete condition and the right approach becomes obvious. Coarse, sharp concrete does not have to be torn out.
Written and reviewed by JOY TECH - an SGS & BV audited, CE/RoHS certified diamond tools manufacturer founded in 2004, exporting to 50+ countries.
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