This is a huge issue that MUST be addressed. We don’t care if you choose Borderline Designs to do your curbing, you must make sure the company you hire takes care of drainage. Every area that may hold water gets a small “v” cut in the concrete to let water out. It is a 4-inch concrete dam and it will hold water. Therefore, when you do long waves and curves you can manipulate drainage. Water will settle at the bottom of a curve, it’s an easy place to place a drain.
Roof Gutter Downspouts are diverted to the grass side of the border using a 4in corrugated pipe and emitter.