Power Washing and Roof Cleaning Forum

Andy Hinson · Approved Exterior Cleaner

Any ideas ?

Art O · Approved Exterior Cleaner

The cement inside the wall is clean. Mixed with water its fresh cement on top of dirty cement

Maverick Contracting · Approved Exterior Cleaner

Do you know why the holes were drilled?
I know of a process for waterproofing foundations where they drill holes and inject an epoxy resin that saturates area and that may be what it is. Had some guys do this on a customers basement stairwell.

Here's an example

http://www.alliedcoatings.com/epoxy-injection-chemical-grout/

-- Edited by Maverick Contracting on Friday 18th of December 2015 08:31:16 PM

Maverick Contracting · Approved Exterior Cleaner

If this is the case you probably have to grind it and or paint over.

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On second look I zoomed in to see what you mean and saw the white streaks by the pipes, if so Art is right, I originally saw the brown streaks which look like epoxy injected

-- Edited by Maverick Contracting on Friday 18th of December 2015 08:48:04 PM

Andy Hinson · Approved Exterior Cleaner

They called it slurry. Said it was from water used when drilling holes. looked like for pipes but I'm not positive