How to Use Concrete Footings for Deck Posts
Concrete is, in fact, the most used material for construction in the world and has been in use since the age of the Roman Empire. Concrete is a mixture of aggregate (sand and gravel) combined with water and cement. Depending on the ratio of these parts, the concrete can be stronger or weaker. Concrete hardens in a process known as hydration, which is caused by the reaction between water and cement. Adding too much water can weaken the concrete.
For most deck projects, it is practical to buy bags of premixed concrete that are prepared by adding water and mixing. You can use a wheelbarrow and mix with a hoe to a consistency that is able to move and fill voids, but is not too wet and soupy. Hoes work better for mixing concrete than shovels. Renting a mixer can reduce your labor time by half. Be sure to follow the instructions listed on the packaging. It is possible to make your own concrete mix by combining 3 parts gravel, 2 parts sand and 1 part cement, but this requires more knowledge and skill than using premixed bags. Your footing should be at least as thick as it is wide at its base. The ideal temperature for pouring concrete is between 50-90 degrees F.
Make sure you use 5,000 psi concrete mix. Once you have poured half of the concrete into the tube, you should consolidate it with a shovel or a piece of rebar to eliminate air pocket voids. Pour concrete until it is overflowing the form tube and level off the top with a shovel.
Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
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.
Working With Concrete
Learn tips from the pros on how to mix and pour concrete for deck footings.
How to Decorate Deck Support Columns
Browse some examples of decorative deck support posts for tall decks.
How to Create Strong Post-to-Beam Connections
Learn how to create a positive structural connection for your post to beam connections. Use lag bolts, through bolts with washers, support cleats and hardware connectors.
Reinforcing Deck Rim or Band Joists
Learn a technique to strengthen your guard rails by installing a double rim joist and adding structural blocking to reduce bounce.
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Learn structural framing methods

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Features
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Design
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Planning
Learn about permits and working with contractors

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Build a covered deck to enjoy all seasons

Ledger
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Care
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How to Use Concrete Footings for Deck Posts
Concrete is, in fact, the most used material for construction in the world and has been in use since the age of the Roman Empire. Concrete is a mixture of aggregate (sand and gravel) combined with water and cement. Depending on the ratio of these parts, the concrete can be stronger or weaker. Concrete hardens in a process known as hydration, which is caused by the reaction between water and cement. Adding too much water can weaken the concrete.
For most deck projects, it is practical to buy bags of premixed concrete that are prepared by adding water and mixing. You can use a wheelbarrow and mix with a hoe to a consistency that is able to move and fill voids, but is not too wet and soupy. Hoes work better for mixing concrete than shovels. Renting a mixer can reduce your labor time by half. Be sure to follow the instructions listed on the packaging. It is possible to make your own concrete mix by combining 3 parts gravel, 2 parts sand and 1 part cement, but this requires more knowledge and skill than using premixed bags. Your footing should be at least as thick as it is wide at its base. The ideal temperature for pouring concrete is between 50-90 degrees F.
Make sure you use 5,000 psi concrete mix. Once you have poured half of the concrete into the tube, you should consolidate it with a shovel or a piece of rebar to eliminate air pocket voids. Pour concrete until it is overflowing the form tube and level off the top with a shovel.
Cutting a Concrete Pad
Learn how to use a concrete saw to cut a hole in a patio slab to install a deck footing.
Installing footings on a sloped yard
Our inspector explains how to install concrete deck footings on uneven ground.
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.
Building a Round or Curved Deck
Learn how to build a curved deck using standard wood-framing materials. Composite decking material is more flexible for curved decks than wood.
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.
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