Problem solving
What to do when an epoxy floor starts peeling, bubbling or failing
Do not rush to paint over the problem. Understand the failure first, then choose the right repair path.
The short version
A failed coating is a symptom. The durable repair starts by identifying whether the cause is adhesion, moisture, movement, contamination, cure or impact.
First, document what is happening
Take clear photos and note where the problem appears, when it started, what the area is exposed to and whether it changes after rain, cleaning or temperature shifts. Patterns can help distinguish local impact from a broader system or substrate issue.
Common causes of failure
Peeling may indicate poor bond or contamination. Bubbling can be associated with moisture or trapped air. Soft areas may relate to mixing or cure conditions. Cracks can reflect movement below. Persistent staining may point to chemical exposure or a topcoat that is not suited to the environment.
- Insufficient mechanical preparation.
- Oil, dust or incompatible material left on the slab.
- Moisture vapour pressure.
- Movement or cracks that were not treated appropriately.
- Incorrect mixing, application or cure conditions.
- Impact, abrasion or chemicals beyond the system’s intended use.
Why painting over it usually makes things worse
A new layer may hide the visible issue briefly while leaving the weak bond, moisture or movement below. The old failure can then transfer to the new coating, making the repair more expensive and harder to diagnose.
Remove or stabilise the affected material and address the cause before specifying a new finish.
When to call a professional
Contact a qualified flooring professional when failure is widespread, returns after cleaning, affects a garage or commercial area, involves moisture, or the original system is unknown. They can assess adhesion, substrate condition and the repair scope rather than guessing from the surface alone.
Want a clear answer for your space?