After persistent rain, basements in Guangzhou residential communities, underground car parks and storage below podium buildings can spread mustiness into corridors. Follow the route from the strongest odor to the entrances. Mark dampness, standing water and odor changes on one plan so engineering can distinguish moisture sources from transfer routes.
Start with Wall Bases & Drainage
After rain, inspect external wall bases, column bases, plant rooms and behind stored items for damp marks, leaks and standing water. Mark odors near channels, floor drains and sumps separately for engineering to investigate drainage and leakage.
Map Odor Transfer Along Airflow Routes
Walk from storage entrances to car-park passages, elevator lobbies and nearby access points. Compare odors with doors open and closed and fans on and off. Mark odor-retaining zones, transfer routes and customer paths on the plan.
After Repairs, Treat & Verify by Zone
Address leaks, drainage and ventilation first. Clean damp surfaces and treat residual mustiness by zone. After completion, recheck wall bases, corridors and entrances along the original route, then inspect again after rain. Return recurring points to engineering for follow-up.
Frequently Asked Questions
Basement mustiness worsens after rain in Guangzhou. What should property teams do first?
Mark damp wall bases, standing water and drainage faults first, then arrange engineering checks. After moisture control, drainage work and cleaning, plan treatment around the odor-retaining areas and recheck the original route after the next rain.
Mustiness is noticeable in both the car park and corridor. How should the treatment area be defined?
Start at the strongest odor area, then follow passages to elevator lobbies and entrances. Use changes with doors, ventilation and operating hours to define strong odor zones and verification points, recording results by zone.
