More in Outdoors
Mark the edge of the area with a spade, cutting down into the grass. Dig down to the required depth recommended by your local code department. Include slab depth and crushed stone in your calculations.
Level pegs around the site to the depth of the concrete pad plus foundations. Nail boards into the pegs. Insert further level pegs and boards to divide the slab into manageable strips. This wooden frame is known as the formwork.
Lay a 4-inch layer of crushed stone in the bottom of all the formwork and compact with a roller or rented vibrator compactor.
Pour foundation concrete into the first section. Use a screed board in a chopping motion to compact it, then level the surface.
Use a float to smooth the surface of the concrete. For large areas, consider renting a power float or screed.
Excerpted from Do It Yourself Home Improvement
© Dorling Kindersley Limited 2009