Problem
Interior damp on a west-facing bedroom wall every monsoon. Interior paint had been redone twice.
- Interior blistering on the rain-facing wall
- Hairline cracks on the external render
Inspection
External crack map plus moisture reading on the inner face after a wet spell.
Evidence
Hairline cracks aligned with the interior damp. No roof-level entry on that bay.
Diagnosis — Probable
Driving rain through cracked external render. Terrace contribution excluded on that bay.
Treatment
Crack filling and weather coat on the rain-facing elevation.
Testing
Visual after the next rain; moisture check on the inner face.
Warranty quoted
Quoted 5-year external wall system. Later painting over the coat without notice excluded.
Same method on your building
Book an inspection. You get the diagnostic report before any coating is sold.