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PSA: scraping my mossy concrete slab with a $9 floor scraper fixed 4 years of green slime in one afternoon
I tried bleach and a pressure washer for 2 summers and it kept coming back, but scraping the top layer off and re-sanding the joints at my place in Tacoma kept it dry and clean for 6 months so far. Anyone else find the green stuff comes back right at the patio edge where the gutter dumps out?
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victorhill11d ago
Scraped mine down to bare concrete last spring after two years of losing the fight to bleach, and it finally stayed clean. The moss had eaten into the top layer so the scraper was the only thing that got it all. You're right about the gutter edge, that's where mine crept back first since the water sits there. Sloped the gutter away and put a little sand in the low spot, and that fixed the last bit.
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