Can I Fix Patio Drainage to Keep Water From Collecting?

Submitted By
Catherine Fox
Answers
1 expert, 0 community
Q:

I have a concrete patio.  It holds water when it rains, and then turns green in the middle. My husband seems to think that the builder did not put a barrier (plastic) underneath it.  How can I fix this or keep it clean?  Thanks for your help. 

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