How-to-form-and-pour-concrete-walls, how to form concrete walls. concrete is one of the cleanest and most versatile types of wall material available. whether you need a wall as a property marker, a support structure, or to hold back soil or water, you can make one by building.... How to build and setup a concrete foundation for garages, houses, room additions, etc part 1 - duration: 30:30. odell complete concrete 4,125,995 views, forming a concrete slab is really quite easy if you have a plan to go by. it takes us about a half hour to form a concrete slab this size. if you're forming a garage slab or a house slab, the steps are basically the same. sometimes all four sides aren't exactly the same length, a 30 ft. by 24 ft. slab is done the same way.