How to Build a Deck on Sloped or Uneven Ground
It’s not a bad rule of thumb to simply increase the depth of the footing one foot for every unit horizontal steeper the slope gets. Between 3:1 and 2:1 slopes, a minimum of two feet deep, and between 2:1 and 1:1 slopes, no less than 3 feet deep. For slopes steeper than 45 degrees, consulting an engineer may be the best choice. Beyond this generalization, you also need to consider if the soil is unstable, loose or sandy. In these cases, the lateral stability for the footings is even worse, and a little more depth is likely necessary to assure they don’t slide down the hill.
Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
Monolithic Pier
Compare the pros and cons of installing a solid concrete deck footing using a cardboard tube or engineered forms.
Prevent Deck Sinking
Sinking deck footings can lead to serious problems. Learn what can cause concrete footings to sink. Properly installed footings will resist sinking.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
How to Use Shared Load Deck Support Posts
Learn how to support an upper and lower deck using one support post and a larger footing by bolting the lower deck into the side of the post.
How to Brace a Swaying Deck
Learn how to install a diagonal brace on your deck frame to prevent racking. Check out our detailed image.
More Helpful Resources
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights
How many footings do I need?
Learn how to determine the number of footings and support posts you need for your deck when designing your deck frame.
Buried Post
Learn how to install a concrete deck footing with a buried treated support post as an alternative to a solid pier foundation.
Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
Why is Joist Protection so Important for Your Deck?
If you’ve ever seen a piece of wood left out in the weather for any period of time, you know what happens: decay. Whether through wet rot, insect damage, or mildew, the fibers begin to break down.
How to Use Steel Metal Deck Support Posts and Columns
Steel deck posts with base plates can be used as an alternative to wood posts for supporting your deck.
How to Build a Freestanding Deck
You may need to build a freestanding deck if you can't attach a ledger board to the house. Learn how to build a self-supporting deck.
Explore Articles by Topic
Footings
Information related to installing frost footings for decks
Framing
Learn structural framing methods
Decking
Learn about wood and composite decking materials
Stairs
An in-depth look at the complex issue of how to build stairs
Railings
How to install guardrails and handrails to meet IRC code
Features
An overview on water drainage, benches, planters and lights
Design
The basics of deck design
Planning
Learn about permits and working with contractors
Porches & Patios
Build a covered deck to enjoy all seasons
Ledger
Proper attachment techniques
Care
Maintain your deck to maintain your investment
Materials
An overview on water drainage, benches, planters and lights