The visible resin layer is only as reliable as the concrete beneath it. Most premature flooring failures can be traced to moisture, contamination, weak laitance or insufficient mechanical preparation rather than the resin itself.
Assess before specifying
The survey should establish concrete condition, moisture risk, existing coatings, contamination, cracks and expected loading. Pull-off testing or trial areas may be appropriate where the substrate history is uncertain.
Moisture readings must be interpreted against the selected resin system and site conditions. Coating over an active moisture problem can lead to blistering or loss of bond.
Create a sound mechanical profile
Grinding or shot blasting removes weak laitance and opens the surface for mechanical adhesion. The method must reach sound concrete uniformly, including edges and difficult areas.
Dust extraction and thorough cleaning are essential. A visually rough floor can still carry fine dust that prevents the primer from wetting and bonding correctly.
Repair before the resin build-up
Cracks, joints, hollows and damaged edges need appropriate repair methods. Moving joints should remain functional and be detailed through the finished system rather than simply filled over.
Primer selection, repair compatibility and application timing should follow the approved system method statement.
- Remove contamination and weak concrete
- Repair defects with compatible materials
- Inspect preparation before primer application
Quality control that protects the finish
Preparation should be treated as a formal inspection stage. Recording moisture, ambient conditions, batch information and coverage rates creates traceability and helps the installation team maintain consistency.
Key Takeaways
- Never skip substrate and moisture assessment.
- Mechanical preparation must expose clean, sound concrete.
- Approve repairs and preparation before applying primer.
