The trim covers the lap joints and locks the boards set up to circumvent separation on uneven floor. The trim pack consists of pre-drilled three-1/4 inch huge top rails and corner moldings that attach on the raised bed with involved screws. Raise the raised bed's top by stacking more layers https://raisedwoodgardenbeds21085.wikiitemization.com/4236306/raised_wood_garden_beds_no_further_a_mystery