Wouldn’t you know it – a piece of concrete is exactly the same place as a future fence post! I bought a blade for cutting concrete ($55, Rona) and, with Floyd pouring water, cut it in line with the rest of the concrete. This was my first time cutting concrete.
It wasn’t bad, but I now know to cut full-depth rather than just an inch deep at a time. Why? Cutting only an inch deep creates enormous heat on just the outer 1 inch of the blade causing warping. Cutting at full-dept, heat is evenly distributed throughout the blade.