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Saw a control joint cut at the Phoenix airport that made me question my saw timing
Flew through Sky Harbor last week and noticed a fresh slab outside the rental car center. The control joints were cut maybe 4 hours after pour in 95 degree heat, and they were clean with zero raveling. I usually wait until the next morning or use a wet saw if I'm behind, but this crew nailed it. How do you folks judge the right window when the sun is baking everything? Also, does anyone run a second pass with a smaller blade to clean up the edges, or is that overkill on a commercial job?
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the_willow1mo ago
You ever try timing it by watching the surface sheen instead of the clock? When that water film just disappears and the slab still has a slight give under your boot, that's your window, even in extreme heat. I've found a second pass with a smaller blade only matters if you're chasing raveling, but on clean cuts like you saw, it's just wasted labor and blade wear.
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