Hi guys, I'm going to be getting more into the paver walks and patios this year and I've been doing my homework on how to install them correctly. The only question I still seem to have is what is the best/easiest way to set the correct grade for drainage for walks and patios? If I remember, it's about 1" for every 4'. Do you use string lines and measurements? Laser levels? Any advice would be great. Thanks.