Ponding water on a concrete tile roof happens when water pools or remains on the surface for an extended period after rainfall. This can occur due to poor roof slope, clogged or improperly placed gutters, or debris blocking water flow, causing water to settle instead of draining away. Because concrete tiles are heavy and designed to shed water quickly, standing water can lead to accelerated wear, algae growth, and potential leaks, especially if the underlying waterproofing layers are compromised. Homeowners can perform simple checks by looking for visible dips in the roof plane, inspecting gutters for debris, and paying attention to water stains on ceilings that might suggest persistent moisture. Be cautious when walking on concrete tiles, as they can break easily, so only do light inspections for obvious issues.
If you spot signs of ponding water, calling a professional roofer experienced with concrete tile roofs is important. They can assess whether your roof’s slope is appropriate and inspect the underlayment for damage, which may require repairs or replacement. Ask your contractor, “How will you ensure proper drainage is restored without compromising the integrity of the tiles?” and “Do you recommend any modifications to the roof ventilation or flashing to prevent future water accumulation?” Since improper fixes can void manufacturer warranties or cause further damage, a trained roofer’s evaluation is crucial. Most fixes might involve reshaping the roof deck, improving drainage paths, or replacing damaged tiles and membrane components to protect your home long term.