Rock Climbing Wall Diy . I decided to use bolt on holds which rely on a single heavy duty 3/8 bolt to secure them to the wall. Cut two 2 x 4 boards at the size you decided to be the hypotenuse or angled part that will be climbed on. DIY Home rock climbing wall Home climbing wall, Rock climbing wall from www.pinterest.com It will be the climbable surface where you’ll attach the holds. 20 diy rock climbing walls to bring the home wall bouldering boom beth rodden outdoor do it so you want build a kids backyard ari homemade your own. Remember your training goals and how you'll be using your diy rock climbing wall.