I need to wash/scrub a front porch area, including ceiling, of cedar
siding/trim (white painted trim and white solid color Olympic stain)
to remove dirt and mold/mildew. I do not necessarily want or need to
repaint so am concerned that tsp might be too strong. What would be
the best ingredient mix?
Simple Green in water works for all my house washing, including vinyl
siding and window frames, concrete, white aluminum trim, and painted
wood. For tough spots (bugshit around outside lights), spray on SG full
strength and let sit for a minute, then scrub.
I don't know about mixing chemicals together. You might get some
unwanted but spectacular results. Besides, it sounds like you will be
working overhead, so bleach in the eyes would not be a good thing, and
neither would Simple Green, for that matter. Any way of getting hold of
a pressure washer?
When washing siding, I believe that you actually want to do it backwards,
starting at the bottom and working your way to the top. The problem is that
the detergent/cleanser will run down the wall and leave a clean mark on the
dirty wall that will be difficult to remove. However, if you start at the
bottom, that problem is eliminated. Once you've done the job, just go over
the whole wall to rinse everything off
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