Concrete surface profile (CSP) is a standardized rating system, developed by ICRI, that describes how rough or textured a prepared concrete surface is on a scale from CSP 1 (nearly smooth) to CSP 9 (heavily textured).
Understanding Concrete Surface Profile in Surface Prep
Concrete surface profile, or CSP, is a rating system created by the International Concrete Repair Institute to give contractors a common language for describing surface texture. The scale runs from CSP 1, which is close to the smooth finish left by a steel trowel, up to CSP 9, which is a heavily aggressive profile with deep peaks and valleys created by methods like scarifying or heavy shot blasting.
Why Surface Profile Matters for Adhesion
A coating needs enough texture to mechanically key into the concrete, and different coating systems are designed for different profile ranges. A thin, high-build epoxy might only need a CSP 2 or CSP 3, while a thick polymer overlay or a broadcast system with a heavy build might call for a CSP 5 or higher. Applying a coating to a profile that is too smooth is one of the most common causes of early delamination.
How Profile Is Created and Measured
Profile is created through mechanical preparation methods like diamond grinding, shot blasting, or scarifying, with the method and equipment settings determining the resulting texture. Contractors measure the actual profile against physical CSP comparison chips, or with a tool like a profile gauge, to confirm the prep work matches what the coating manufacturer specifies on the technical data sheet.
Matching Profile to the Coating System
Manufacturers list a recommended CSP range for each product, and skipping this step is a common mistake on bid jobs where prep gets rushed. Always confirm the required profile before choosing a prep method, since correcting an under-profiled floor after the fact means redoing the prep work entirely.
Also Called
CSP, ICRI Surface Profile
