DIY Network

How to Lay a Concrete Pad

A basic concrete slab can be used for a patio, entryway or a surface for an HVAC unit to sit upon.
Excerpted from Do It Yourself Home Improvement

More in Outdoors

Step-by-Step Instructions:

Excavate the Area

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.

Build Wooden Frame

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.

Courtesy of DK - Do It Yourself Home Improvement © 2009 Dorling Kindersley Limited

Add Crushed Stone

Lay a 4-inch layer of crushed stone in the bottom of all the formwork and compact with a roller or rented vibrator compactor.

Courtesy of DK - Do It Yourself Home Improvement © 2009 Dorling Kindersley Limited

Pour Concrete

Pour foundation concrete into the first section. Use a screed board in a chopping motion to compact it, then level the surface.

Courtesy of DK - Do It Yourself Home Improvement © 2009 Dorling Kindersley Limited

Smooth Concrete

Use a float to smooth the surface of the concrete. For large areas, consider renting a power float or screed.

Courtesy of DK - Do It Yourself Home Improvement © 2009 Dorling Kindersley Limited

Cover With Plastic Sheet

Cover the pad with a plastic sheet to protect it from the weather. You can remove the formwork once the concrete has hardened.

Courtesy of DK - Do It Yourself Home Improvement © 2009 Dorling Kindersley Limited

Excerpted from Do It Yourself Home Improvement

© Dorling Kindersley Limited 2009

Advertisement

Projects