The problem
Most commercial coatings fail not because the paint was wrong but because the surface beneath it was never properly prepared — and preparation is the one stage a finished wall hides completely.
Our approach
Substrate Preparation for Commercial Painting
Substrate preparation for commercial painting by Coralex Painters — surfaces assessed, defects remediated, and preparation graded and recorded to ISO 8501 before any coating goes on, so the finish has something sound to hold to.
The Challenge
The most common reason a commercial coating fails early has nothing to do with the paint. It is that the surface underneath was never brought to a state the coating could bond to. Loose and chalking material, contamination, residual moisture, failed previous coatings, and an unsealed substrate all defeat even an excellent system — the topcoat adheres to the weakness beneath it rather than to the wall, and peels, blisters, or flakes away with the layer it was painted over.
The trap is that preparation is invisible once the work is done. A wall that was scraped and washed for an hour and a wall that was properly assessed, remediated, and prepared look identical under the first coat. So preparation is the easiest stage to cut, the hardest to detect, and the most expensive to get wrong — because when the coating lets go, the only fix is to strip back to the substrate and start again. For a commercial client, a beautiful finish over a bad surface is a guaranteed early repaint.
The Coralex Painters Solution
Coralex Painters treats preparation as the stage that decides the life of the coating, and specifies it before any paint is chosen. Each surface is assessed first — substrate type, existing-coating condition and compatibility, moisture, contamination, and the defects that need remediation rather than concealment. Where water is getting in, cracks are open, or render is failing, those are brought into scope and resolved, because a coating laid over an active defect inherits it.
Preparation is then carried out and graded against ISO 8501, the international standard that defines the visual cleanliness and condition a substrate must reach before coating. That turns preparation from a subjective effort into a defined, inspectable result: the surface is held to a standard, signed off at that standard, and only then coated. The system that follows is matched to the prepared substrate, so the finish bonds to sound material and delivers its design life instead of failing back to the wall. This is the preparation discipline that underpins every commercial commission Coralex has delivered across Accra since 1984.
Documentation & Process Specification
Preparation is recorded as a distinct, signed-off stage rather than absorbed silently into the job: a substrate condition assessment; a register of defects found and the remediation applied; surface preparation graded and signed to ISO 8501; and confirmation that the prepared substrate met the standard before any coating was applied. Subsequent film build is verified to ISO 2808. The client receives proof that the foundation of the finish was sound — the one stage that otherwise disappears entirely under the first coat.
Typical Engagement Profile
These engagements run as the preparation stage within commercial repainting and fit-out commissions — corporate offices, banking halls, hospitality interiors, and retail centres — whether as the disciplined front end of a full painting package or as remedial preparation on a building with a history of coating failure. They are foundational and inspection-bound, the discipline Coralex Painters has built every commercial finish on for four decades.
Outcomes
- Surfaces assessed and defects remediated before they are coated over
- Preparation graded to a defined standard, not left to subjective effort
- A coating that bonds to sound material and reaches its design life
- A recorded preparation stage that proves the foundation of the finish was sound