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Spent 4 hours trying to get a subfloor flat for LVP yesterday
I had a job last week where the concrete slab had this ONE high spot right in the middle of the room. I thought I could grind it down in 30 minutes tops. Four hours later I was still going at it with the grinder and a cup wheel. The dust was EVERYWHERE even with a dust shroud on my rig. Anyone else run into a spot that just would not level out and ended up way over schedule?
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harperg765mo ago
Man I feel your pain on that one. I had basically the same thing happen on a job last fall, a high spot that just would not quit no matter how much I ground on it. What finally worked for me was switching to a diamond cup wheel with way more aggressive segments and taking much lighter passes instead of trying to hog it all off at once. That little trick cut my time on the next stubborn slab down to about an hour, and the dust was still crazy but not like a sandstorm blowing through the house.
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dixon.iris5mo ago
Right away I knew exactly what you meant about that high spot that just won't quit. I had a slab last winter that drove me crazy for two full days until I finally tried a slower speed on the grinder with a brand new cup wheel. Light passes and letting the tool do the work instead of forcing it made all the difference, even if the dust still felt like I was sandblasting the whole basement.
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kellyjones5mo ago
Oh man, I've been there too and it's just the WORST when you think you're finally done and that spot mocks you every single time. Slow speed with a fresh cup wheel, that's actually genius. I had a slab last spring that had me and my partner going at it for three days before we figured out we were pushing way too hard. The moment we backed off and let the grinder do its thing, it cut through that high spot like butter. And yeah, the dust situation is always a nightmare no matter what you do.
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