How to Prevent Sagging & Sinking Decks
Before you dig your frost footings, you will want to make sure the soil is properly compacted to support the deck load. Often when new houses are built, the process of digging the foundation disrupts the soil and leaves the yard unsettled. This means the entire yard will slowly drop in elevation relative to the house.
It is not uncommon for this to cause patios and driveways to crack. Likewise, if you anchor a deck to footings that are built on soil that is not properly compacted, your deck will probably sink. Needless to say, this is something you want to avoid. If you suspect your soil is unsettled, you will either have to wait for the yard to settle or dig the footings to a depth where the ground is compact. Certain kinds of soils are more problematic than others. Clay soils are particularly prone to shrinking and swelling. If you live in a new house, you may want to talk to your builder or local building inspections department to see if they have any information or suggestions. You can mark the level of the yard as it meets the house where you will be building your deck and observe it over a couple of months to see if you notice any change. If you have reason to believe settling may cause you problems, you may consider hiring a soil engineer to assess the situation, but this will result in an added cost to your project.
Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
Can I reuse existing footings
Our inspector discusses the topic of reusing footings for a new deck.
Do I need to use rebar?
Our inspector discusses using steel rebar for deck footings.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
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.
Building A Deck Over An Air Conditioner
Things to consider when building a deck near an air conditioning unit. You may want to relocate the AC unit if possible to avoid some problems.
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.
Water in deck footing holes
Find out what to do if your deck footing holes fill up with water.
Can I use pier blocks?
Our inspector explains the pros and cons of using pier blocks for deck foundations.
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 Install Concrete Support Deck Posts & Columns
Learn how to install concrete deck piers to support your deck frame. Use cardboard form tubes to extend your footings above grade.
Blocking And Bridging
Learn how to strengthen your deck by adding blocking or bridging material at the mid-span of your joists. Blocking can be used to strengthen guardrails.
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