A symptom of trapped moisture
— not a painting problem
Flaking and peeling paint on Maltese limestone is almost always caused by moisture trapped behind an impermeable paint layer. As vapour pressure builds, the paint film blisters and detaches. Repainting with the same product simply repeats the cycle — often within months.
Understanding the Problem
Flaking paint is one of the most frustrating problems for Maltese property owners because the conventional response — repainting — almost always fails. The reason is simple: flaking paint is not a painting problem, it is a moisture problem. When impermeable acrylic or plastic paints are applied to Maltese limestone, they create a vapour barrier that traps moisture inside the wall. As the sun warms the wall surface, moisture vapour pressure builds behind the paint film. When this pressure exceeds the adhesion strength of the paint, it blisters and detaches. The cycle repeats because the root cause — trapped moisture — is never addressed. In many cases, the moisture comes from rising damp or salt migration within the wall. In others, it is condensation from inside the building that cannot escape through the impermeable paint layer. The only lasting solution is to use breathable, mineral-based paints that allow moisture vapour to pass through harmlessly, combined with proper diagnosis and treatment of the underlying moisture source.
How It Happens
Moisture accumulates within the wall from rising damp, condensation, or rain penetration.
Impermeable paint is applied, creating a vapour barrier that traps moisture inside the wall.
As the wall warms, water vapour pressure builds behind the paint film.
When vapour pressure exceeds paint adhesion strength, the film blisters and detaches.
Repainting with the same product repeats the cycle, often with faster failure each time.
Warning Signs to Watch For
- Blistering or bubbling paint surface
- Paint peeling in sheets or flakes
- Recurring failure after repainting
- Hollow sound when tapping painted surface
- Visible salt deposits under paint film
Why This Matters
Flaking paint is often dismissed as a cosmetic issue, but it is a clear indicator of a serious moisture problem within the wall. Left unaddressed, the trapped moisture will continue to damage the building fabric, accelerate salt crystallisation, and potentially lead to structural issues. Each cycle of painting and failure also wastes money and creates unnecessary environmental impact from repeated product application and removal.
Case Study: Mdina Property Facade Restoration
Location
Mdina, Malta
Challenge
A historic property in Mdina had been repainted three times in five years, with paint failing within months each time. The owner had spent over €8,000 on paint and labour with no lasting result.
Result
Paint has remained intact for 4 years with no flaking or blistering. The owner saved money by solving the problem once instead of repeatedly repainting. The building fabric is now protected and breathable.
Our Solution
Complete removal of all acrylic paint layers. Diagnosis revealed rising damp and salt contamination. Application of salt-resistant lime base coat, followed by RÖFIX breathable finish and Arreghini silicate mineral paint.
The Right Solution
Breathable Paints — a system-based approach that addresses the root cause, not just the symptoms.