Rain water soaking through external walls

Guwahati driving monsoon rain hits exposed west and south facades. Cracks in external plaster, failed paint, and open chajja joints let water into bedroom walls.

Symptoms

• Interior damp on external walls only
• Worse during wind-driven rain
• Algae on exterior plaster
• Paint failure on sun-exposed side

Diagnosis

Facade survey, window percolation test, and coating adhesion check.

Silicone coating vs proper plaster repair?

Coating is temporary on cracked substrate. Crack repair + breathable coating lasts longer.