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Add extra charm and space to your patio by extending or creating a concrete slab. A concrete slab will give you extra room for cooking out on the grill or sitting and relaxing with friends and family.
Use this checklist when you go to the store and purchase your items.
Sidewalks and patios should be at least 4 inches (100 millimeters) thick. For rectangular slabs, construct forms out of 2-inch-by-4-inch (50 millimeters by 100 millimeters) boards. For curved slabs, use 1⁄4-inch (6 millimeters) plywood for the forms.
Dampen the forms and base thoroughly but don't leave puddles.
Mix PRO FINISH QUIKRETE® 5000 Concrete Mix, and shovel into the form to completely fill it at a uniform depth and approximately 1/2 inch (12 millimeters) above the form.
After the concrete has been spread and compacted, strike off and level using a 2-inch-by-4-inch (50 millimeters by 100 millimeters) board. Move the edge of the board back and forth with a sawlike motion. Float the surface smooth using a wooden or metal float or darby.
Cut the concrete away from the forms by running an edging tool or trowel along the forms to compact the slab edges. Cut 1-inch (25 millimeters) control joints into the slab every 6 to 8 feet (1.8 to 2.4 meters) using a grooving tool.
For a smooth finish, use a steel trowel after the surface moisture has evaporated and the concrete has lost its sheen. A broom can be used for a more textured, skid-resistant finish.
Cure the concrete according to instructions.