Any advice on most efficient way to clean a red brick patio with gray mortar? Lots of mildew and algae. How would you bid? Also, need advice on how to best clean a white brick, light colored mortar entrance to an office building. Lots of black due to high foot traffic, plenty of gum. Type of chemical recommended. Bidding advice?
Thanks,
Mazzzzzz
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Thanks,
Mazzzzzz
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