Weep holes have a tendency to undermine and become larger in size due to traffic and water that saturates the stone and sub-grade.
Weep Holes
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Clog easily & difficult to maintain
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Increase in size
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Can trap water and freeze during inclement weather
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Hazardous to Pedestrians, Vehicles and Bicyclists.
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Unsightly
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Must be patched prior to paving
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Allow water to saturate stone base and sub-grade