Hi all:

Attached are pics of an entrance, cement, that is supposedly dirtied from watering a flower box directly above the entry. There are gaps in the caulk also. Clean with alkaline and high pressure? Concerned about the age of cement and it being damaged. Help is appreciated.

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Sincerely:

Don Semi
www.srsdenver.com
srsdenver@gmail.com
303-249-7909