Problem
Damp streak on the external wall under a first-floor balcony after rain.
- Stain on the elevation below the balcony
- Water sitting at the sliding-door track
Inspection
Visual of threshold, outlets and railing posts; moisture check on the wall below.
Evidence
Ponding at the door track and open joints at railing posts. No terrace-level entry above.
Diagnosis — Confirmed
Failed balcony waterproofing at threshold and post penetrations.
Treatment
Acrylic system on the balcony slab, threshold detailing, outlets cleared.
Testing
Hose test at the threshold after curing.
Warranty quoted
Quoted 5-year balcony system. Later civil cuts at the railing excluded.
Same method on your building
Book an inspection. You get the diagnostic report before any coating is sold.