Mastering Deck Footings: Exploring Types & Installs

Deck post footings are the foundation of any sturdy deck. Without proper footings, your deck can shift, settle, or even collapse over time. The type of footing you choose depends on the deck's design, the terrain, and local building codes. Here, we'll explore the main types of deck post footings, their applications, and considerations for installing them.

Before diving in, it's crucial to understand that all these footings serve a common purpose: to transfer the weight of your deck and its occupants evenly to the ground, preventing settling and maintaining structural integrity. Now, let's look at the most common types of deck post footings.

Concrete Footings

Concrete is a reliable choice for deck footings due to its superior load-bearing capacity and longevity.

Bentonite Concrete Footings

Bentonite concrete footings are a popular choice due to their simplicity and effectiveness. The bentonite admix in the concrete creates a self-sealing, waterproof barrier around the post, protecting it from decay-causing moisture. Here's how to install them:

• Dig a hole at least 1/3 the length of the post below the frozen ground level.
• Insert the post, ensuring it's plumb, and secure it temporarily.
• Mix the bentonite with concrete and pour it into the hole, allowing it to cure fully.

granular-based Concrete Footings

For areas with expansive soils, granular-based concrete footings are more suitable. The granular base (usually crushed stone or gravel) provides better drainage and prevents frost heaving. Here's how to install them:

• Excavate the hole, ensuring it's larger than the footing form to accommodate the granular base.
• Fill the bottom of the hole with granular material, compacting it evenly.
• Place the post, secure it temporarily, and pour concrete around it, leaving space for the granular base on top.
• Fill the remaining space with granular material, and allow the concrete to cure.

P.scss (Post-Deck Support System) Footings

Post-Deck Support Systems, or P.scss, footings are a more advanced option. They consist of a precision-engineered base with integrated brackets that can adjust to the post's size and provide instant leveling. Here's how to install them:

• Dig a hole to the required depth.
• Position the P.scss base in the hole, ensuring it's level. Then, place the post through the bracket and secure it.
• Fill the void around the base with concrete or granular material, ensuring it's well-compacted.

While P.scss footings are more expensive, their ease of installation and precise leveling make them a worthwhile investment, especially for larger or more complex deck projects.

Galvanized Steel Brackets

For smaller decks or additions, galvanized steel brackets can be used as footings. These brackets attach directly to the post, transferring the weight to the ground below. Here's how to install them:

• Dig a narrow hole, ensuring it's deeper than the bracket's height.
• Position the bracket in the hole, ensuring it's level. Then, place the post through the bracket and secure it.
• Backfill around the bracket with concrete or granular material, ensuring it's well-compacted.

While these footings are simpler and more affordable, they're not recommended for larger decks or areas with high water tables.

In the end, the best deck post footing depends on your specific needs, terrain, and local building codes. Always consult with a professional if you're unsure, and prioritize longevity and structural integrity for a safe, lasting deck.