What You Need to Know About Deck Footing

What You Need to Know About Deck Footing

Load-bearing posts support the framing of decks and overheads. These posts must be set in a footing, which is a hole in the ground that reaches below the frost line and is packed with concrete.

What You Need to Know About Deck Footing

The soil, drainage, climate and slope must be considered when installing footings. In this post, your trusted roofing contractor, ABM Services & Renovations Inc., discusses what you need to know about deck footing.

Deck Loading

Footings have to support the dead and live loads within a structure. The deck’s dead load is the combined weight of its posts, beams, framing, decking, stairs, planters and railings before transient items are placed on it.

Most codes require the deck construction to support 10 pounds per square foot of dead load and 40 pounds per square foot of live load. This means footings and other support elements must be able to support at least 50 pounds per square foot.

It’s best to leave your deck construction to professionals to ensure the beauty and durability of your outdoor space. Choose your local roofing expert, ABM Service & Renovations Inc., to help you design and build the perfect deck for your home.


The soil’s ability to support a load depends on its consistency. Loose soil has a lower load-bearing capacity and may need more footings than clay or thicker soils. Local codes consider soil conditions so make sure to contact your local building department before constructing your deck.


Frequent freezing and thawing can cause the soil to expand and contract. This movement can affect the stability of the posts if they aren’t properly set, resulting in shifting or cracking on the deck structure. The frost lines in different regions vary and local codes specify how deep you need to dig to set the footings.


For posts set in sloping terrain, most codes require at least seven feet of soil from the bottom of the footing up to the surface.


Most local codes require three to six inches of gravel in the bottom of the footing hole for proper water drainage from the bottom of the post.

Only trust your deck construction to a reliable contractor like ABM Services & Renovations, Inc. Our team undergoes regular training to remain updated on the latest and most efficient installation techniques and we only use quality materials for all our projects. We also specialize in residential and commercial roof installation. Call us at (770) 282-3700 or fill out our online form for a free estimate. We serve homeowners in Sandy Springs and Locust Grove, GA.