All our pads are on the level and quality to the next level. We use pressure treated 6x6 lumber for the border, notched at all joints and pegged every 6-8 ft with 18” long, 3/8” rebar. Weed barrier fabric is pinned to the ground on top of which some type of gravel is leveled to the top of the border. All pads are ALWAYS laser leveled and perfectly square to ensure quality results for the best customer experience.