We offer a complete line of commercial playground slides including Wave Slides, Flat Plastic Slides, and Straight or Spiral Tube Slides. All slide plastics are commercial grade rotationally molded 1st quality polyethylene with UV stabilization, anit-static inhibitors and 3/8 wall thickness. Our featured commercial playground slides: Indoor Kids Spiral Tube Slide Additional middle sections can be added for increased deck heights. Each section raises the required deck height by about 1 foot. When adding middle sections, some rotational adjusting can be done to fine tune it to match the actual deck height. By design, some drilling of new holes may be required for exact placement of bolts. Alternatively you can build up the area under the base with a mixture of soil and/or patio stones so the base of the slide is firmly seated.