How to Frame for Cement Curb

Decide the type of curb you want to build, as this will determine the type of material you need to purchase from your local home improvement store. For example, a typical 4 inch high curb will utilize 2-by-4 material, while a higher curb will require 2-by-6 material, for example, or even plywood for larger areas, cut down to size.

Measure the area for the curb. Spray the area with spray paint to outline the working area. Measure your wood forms to size, depending on how high or wide you want your curb. Cut them to fit with a circular saw and place them where you will be building your curb. Hold the forms together with nails driven into the wood just enough so that the wood is held together, but not so deep you cannot pull the forms apart by hand later.

Cut the rebar down to the proper height, depending on the height of the curb. Use an angle grinder with a metal cutting blade. The idea is for the rebar to be just tall enough to sit within the curb itself without poking through the top of the curb. Cut the rebar at least 3 inches over-length so you can sink that depth into the soil. Place the rebar on the inside of your form just inside from the boards.

Mix the concrete according to the manufacturer's instructions and pour it into your curb forms. Finish the top surface with a concrete float and allow it to cure for the amount of time indicated by the manufacturer before removing the curb forms. Remove the curb forms by pulling them apart by hand or with the claw of the hammer, and save them for future use.