The weeks before monsoon season are the best time to find and fix weak points, when the roof is dry and any existing damage is easy to see clearly — waiting until the first heavy rain means finding out where the leaks are the hard way.
Start on the roof: check parapet wall joints, drain outlets and any pipe or cable penetrations for hairline cracks, and clear debris from drains so water has a clear path away from the roof surface during heavy rain.
Inspect water tank lids and overflow pipes — a poorly sealed tank lid lets rainwater and debris straight into your drinking water supply during monsoon downpours, a commonly overlooked risk.
Check external wall surfaces, especially on the side that gets the most wind-driven rain, for signs of previous seepage such as paint bubbling or dark staining, since these areas are likely to leak again under sustained rainfall.
If your basement has ever shown even minor dampness, don’t wait for monsoon to test it — treat it beforehand, since basement seepage under sustained monsoon groundwater pressure is far harder and more disruptive to fix once water is already actively coming through.
Book any waterproofing repairs at least a few weeks before the rains are expected, since most membrane and coating systems need dry curing time and cannot be applied effectively once daily rain has started.