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Saw a museum floor in Boston that made me rethink expansion joints
The concrete had these perfectly spaced, hairline cuts that were almost invisible but clearly did the job for decades. Anyone know a good blade for that kind of finish on a commercial slab?
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the_mia1mo ago
Those old-school cuts are a lost art. They used diamond blades with super fine grit, like a 200-grit or higher. Modern blades cut too fast and leave a rough edge. You need a blade made for clean, shallow work, not for ripping through rebar. Look for a continuous rim blade meant for tile or stone, run it slow on a walk-behind saw.
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karen_sanchez101mo ago
My dad still uses a 120-grit blade on his old saw and gets cleaner lines than any new tool I've tried.
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