How do you determine whether a surface is the proper roughness to allow the coating to soak in? To answer that question, you must have a thorough understanding of concrete surface profiles (CSP).
The surface profile is the measure of the average distance from the peaks of the surface to the valleys, as seen through a cross-sectional view of the surface of the concrete.
Surface Profile Selection
Selection of a surface profile is dependent upon the type of surface being prepared, the type of system process, and the type of service the structure will be subjected to, as well as the type of the resinous flooring system
In particular, the type of use the floor will get will also determine the degree of profile required. Having the proper profile will ensure that the surface will accept the application of polymer-based products and allow the polymer flooring to mechanically bond to the concrete.
How do you know whether you have the correct surface profile?
The ICRI Technical Guideline No. 03732 CSP numbers range from CSP 1 (nearly flat) through CSP 10 (very rough) and correspond to the method used in the preparation of the surface, for optimal bonding of your new concrete floor coating
To achieve each grade progressively, more aggressive methods and equipment are used to produce more rough and textured profiles for applying one or more layers of the sealer, coating, or polymer overlay systems.
To accurately replicate each grade, The International Concrete Repair Institute (ICRI) designates the CSP’s and produces a set of 10 pictorial and physical samples. These samples are used to evaluate whether the surface profile is in accordance with the project specifications.
CSP’s greatly aid in the communication of project objectives and requirements. Molded replicas profiles provide clear visual standards for purposes of specification, execution, and verification.
These benchmark profiles may be referenced in specifications, material data sheets, application guidelines, and contract documents to effectively communicate the required surface profile for your epoxy flooring system
Based on the material provider’s datasheet, a CSP can be identified that will determine the method of surface preparation needed for the project. The ICRI provides charts that relate CSP’s to materials to be applied and surface preparation method.