How Deep Should a Concrete Slab Be for a Carport?

by Katherine Harder

At Least 4 Inches

In an article for Residential Construction Magazine, Pieter Vanderwerf, president of a consulting company to construction firms, states that the standard thickness for residential concrete pads is 4 inches. Remember to account for the end of your slab, which you should allow to taper into a wedge shape, creating a ramp for your vehicle.

Greater Thickness for Heavier Loads

If you own a recreational vehicle, garbage truck or other heavy vehicle, increase your carport's concrete pad thickness to 5 to 6 inches, a thickness that can better handle a heavy load without cracking.

Bottom Line

Four inches deep is the industry standard for carport concrete pad thickness. Add an extra inch or two for carports that must support heavy loads.

About the Author

Katherine Harder kicked off her writing career in 1999 in the San Antonio magazine "Xeriscapes." She's since worked many freelance gigs. Harder also ghostwrites for blogs and websites. She is the proud owner of a (surprisingly useful) Bachelor of Arts in English from Texas State University.