Guide
Five Sources of Parkade Water
Why parkade leaks are rarely one thing, and how to tell them apart.
Parkade water usually comes from a short list: rain through the ramp or openings, irrigation overspray, failed expansion joints or membranes, plumbing lines above, or groundwater pressure. Each has a different fix.
The pattern tells you a lot. Rain-driven entry correlates with storms. Plumbing leaks follow usage - worse on weekday mornings. Membrane failures show broad damp areas that grow slowly. Groundwater is seasonal.
Investigating the pattern before repairing prevents the classic mistake: sealing a joint while the actual source is a drain line, or replacing a drain while rain pours through the ramp.
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