Deck Piers (Deck Blocks) or Footings? The Ultimate Guide to Building a Solid Deck Foundation
When it comes to building a deck foundation system that lasts, everything starts with a solid foundation. Whether you're a weekend DIYer or a seasoned pro, choosing the right base and building materials is one of the most important decisions you'll make. It affects your deck’s stability, longevity, and even the ease of installation.
But it’s not just about convenience — the substructure is the most critical part of your deck. Poor foundation planning can lead to instability, costly repairs, or even collapse, making the right choice crucial for both safety and long-term durability. A strong, well-chosen foundation ensures your deck can support the weight of furniture, foot traffic, and weather stress without shifting or failing.
In this guide, we’ll break down the key differences between traditional concrete deck footings and modern deck piers, including a closer look at innovative solutions like TuffBlock. Whether you’re planning a low-profile floating deck or something more substantial, this comparison will help you choose the best option for your project from the ground up.
1) Deck Piers vs Footings
a) What are Deck Footings?
b) What are Deck Pier Blocks?
2) Concrete Footings – The Traditional Choice for Deck Foundations
a) Pros of Concrete/Cement Footings
b) Cons of Concrete/Cement Footings
3) Deck Piers – The Smarter, Faster Alternative
a) Concrete Deck Blocks vs TuffBlock
b) The Differences: Concrete Deck Piers vs. TuffBlock
c) Cost Comparison: Deck Piers vs. Footings
d) When to Use Deck Footings vs. Deck Piers
e) Environmental Conditions & Soil Suitability Considerations
4) What About Building Codes around Deck Piers?
5) Real-World Examples & User Scenarios
a) Floating Deck in the Backyard
b) Elevated Deck Attached to House
6) Conclusion – Which Is Best for You - Deck Piers or Footings?
a) Our Recommendation?
b) Ready to Build Smarter?
7) FAQ
Deck Piers vs Footings
When it comes to supporting your deck, there are two main foundation types: deck footings and deck piers. Each has its own method of installation, use cases, and benefits — and choosing the right one can make all the difference in how easy your build is and how long it lasts.
What Are Deck Footings?
Deck footings are the traditional method used in most permanent deck builds. They involve digging deep holes into the ground, setting up formwork, and using concrete to create a stable, below-ground support system.
- Designed for permanent, load-bearing structures
- Commonly required for elevated or attached decks
- Involves digging, formwork, and often inspections
- Needs cure time for the concrete to fully set
- Typically the go-to option for projects that must comply with strict building codes
What Are Deck Pier Blocks?
Deck piers are a quicker, surface-based alternative to traditional footings. They sit directly on (or slightly into) the ground and can be made from heavy concrete blocks or advanced polymer materials like TuffBlock or composite material. They are an instant foundation system.
- Used as surface or shallow foundation supports
- Ideal for floating decks, ground-level builds, or temporary structures
- Come in forms like precast concrete blocks or lightweight engineered piers
- No digging or drying time required
- Perfect for DIYers or anyone looking to speed up installation
With piers, especially modern options like TuffBlock, you can simplify your build without sacrificing stability — as long as your project fits the right criteria.
Concrete Footings – The Traditional Choice for Deck Foundations
Concrete footings have been the go-to foundation method for decades — and for good reason. They offer rock-solid support and are often required by building codes for larger or elevated decks. But while they’re strong, they also come with a few notable trade-offs.
Pros of Concrete/Cement Footings
- Extremely strong: When properly installed, concrete footings can support significant structural loads and withstand decades of use.
- Code-compliant: Most building regulations require footings for decks that are attached to a house or elevated over a certain height, making concrete footings a safe bet for compliance.
- Long-lasting: If done correctly, concrete footings can last the lifetime of the deck — or even longer.
Cons of Concrete/Cement Footings
- Time-consuming: Concrete footings require digging deep holes, setting up formwork, and allowing time for the concrete to cure. Inspections may also be needed.
- Labor and equipment-heavy: You’ll need tools like post hole diggers, concrete mixers, and potentially a lot of manpower to complete the job.
- More expensive: Between materials, labor, and time, concrete footings tend to cost more than alternative solutions.
- Not DIY-friendly: The process can be daunting for beginners and is often overkill for small, low-to-the-ground, or freestanding decks.
For permanent, elevated decks where strength and compliance are non-negotiable, concrete footings still make sense. But if you're looking for something quicker, easier, and just as durable for the right use case, there are other options to consider.
Deck Piers – The Smarter, Faster Alternative
For many modern deck builds — especially floating or low-profile projects — deck piers offer a much quicker and more convenient solution than traditional concrete footings. Instead of digging and pouring, you simply place the piers on a leveled surface, making them ideal for DIYers, weekend projects, or tight timelines.
Concrete Deck Blocks vs TuffBlock
There are two main types of deck piers available:
- Concrete Deck Blocks: These are precast blocks that act as surface footings. They’re heavy but familiar and widely available.
- Engineered Pier Blocks (like TuffBlock): Made from high-strength polymer materials, these are lightweight, easy to handle, and specifically designed for speed and versatility in deck construction.
The Differences: Concrete Deck Piers vs. TuffBlock
TuffBlock’s engineered design makes it a clear winner for quick installs, portability, and sustainability — all without sacrificing strength. For floating decks or ground-level builds where digging isn’t feasible (or wanted), TuffBlock is the smart choice.
| Feature | Concrete Block | TuffBlock |
|---|---|---|
| Weight | ~15kg | ~0.68kg (1.5lbs) |
| Material | Concrete | Recycled high-strength polymer |
| Installation | Heavy, time-consuming | Lightweight, fast |
| Durability | Can crack or degrade | UV-stable, corrosion-proof, 25 year warranty |
| Environmental Impact | High | Made from recycled materials |
| Code Compliance | Varies | Varies (typically for floating decks) |
| Post Slot Versatility | Limited slot options | Fits 3.5" x 3.5", 4" x 4" posts, and 1½–2" joists |
| Weight Capacity | ~1,700–2,000 lbs per block | ~1,700 lbs per block |
| Break Test | ~2,000–2,500 lbs | Over 11,000 lbs |
| Moisture Wicking | Porous material absorbs water, which can cause freeze–thaw damage, pitting, and corrosion of any embedded steel. | Non-porous — will not absorb water or suffer from freeze–thaw damage. Ventilated, raised design prevents moisture build-up |
Cost Comparison: Deck Piers vs. Footings
Budget is often a major factor when planning a deck, and understanding the cost differences between deck piers and concrete footings can help you make a smarter decision — both for your wallet and your long-term goals.
Deck pier blocks, especially lightweight options like TuffBlock, are generally more cost-effective up front. Since they require no digging, no concrete, and minimal tools or equipment, you save significantly on labor, materials, and installation time. For DIYers or small backyard projects, this can translate into hundreds — even thousands — in savings.
Concrete footings, by contrast, come with higher upfront costs. You'll need to dig deep holes, pour concrete, and potentially hire professionals. Additional costs can include permits, equipment rental, and more time spent on preparation and curing. However, that investment can pay off when building large, elevated, or permanent decks that require long-term structural integrity.
If you’re after a quick, budget-friendly build, TuffBlocks offer significant savings on time, labor, and materials — without compromising on longevity. In fact, each TuffBlock is backed by a 25-year warranty and built to withstand the elements without cracking, chipping, or corroding like concrete can over time.
While concrete footings are still preferred for large, elevated, or permanently attached decks that require deep anchoring, they’re also heavier, slower to install, and can degrade over decades if exposed to moisture or frost.
In short, TuffBlocks are ideal for fast, strong, and long-lasting floating decks, while concrete footings remain best for elevated, heavy-duty builds that require in-ground support and strict code compliance.
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When to Use Deck Footings vs. Deck Piers
Choosing between deck footings and piers largely comes down to your deck type, height, and whether or not it’s attached to a structure. Here’s a simple guide to help you decide which option is best for your build.
Choose Concrete Footings If...
- It's over 1.2 meters (4 feet) high: Elevated decks need deeper support to handle greater loads and lateral movement.
- Building codes in your area require it: Many councils or municipalities mandate footings for specific types of decks — especially attached or multi-level ones.
- While TuffBlocks are engineered to handle substantial loads and offer long-term durability, concrete footings may still be required when your deck is connected to a structure, built over 1.2 meters (4 feet) high, or must meet specific building codes that call for in-ground anchoring.
Choose Deck Piers If...
- You're building a floating deck or freestanding deck: Piers are perfect for ground-level, unattached decks that don’t require deep foundations.
- You're working on low clearance (e.g. under 8 inches): In tight spaces, piers like TuffBlock are often the only option that fits.
- You want a DIY-friendly, fast install: No digging, no concrete, and no cure time — piers are ideal for weekend builds or beginners.
- You're looking to avoid digging, drying time, and inspections: If your project allows, using piers can save time, cost, and complexity.
- You need to avoid digging: Piers are the go-to option when digging isn't possible — for example, over existing concrete slabs, tree roots, or areas with underground pipes or cables.
Environmental Conditions & Soil Suitability Considerations
Your choice of foundation shouldn’t just be based on convenience or design — your environment matters just as much. Climate, soil type, and ground stability all impact the long-term success of your deck.
TuffBlocks and other pier blocks are ideal for use on firm, level ground where drainage is good and the soil stays relatively stable. They work best in moderate climates and are especially useful for quick installs where minimal disturbance to the ground is preferred.
On the other hand, concrete footings are better suited for loose, sloped, or moisture-prone soil, and in regions where you experience frost, snow, or heavy seasonal rainfall. Because footings are dug deep into the earth — often below the frost line — they’re able to resist movement caused by ground shifting, erosion, or frost heave.
Soil and climate play a big role in your choice. Pier blocks are best on solid, level ground, while footings are more appropriate in areas with frost, heavy rain, or unstable soil that needs deeper support.
By matching your foundation type to your site conditions, you’ll help ensure a safe, long-lasting deck — no matter where you’re building.
What About Building Codes around Deck Piers?
Before you build, it’s essential to understand the regulations in your area.
- Always check with your local building codes to determine if footings are required. This is especially important for attached or elevated decks.
- Footings are often mandatory for structural integrity and safety in decks that are connected to your home or exceed a certain height.
- Deck piers like TuffBlock are generally allowed for freestanding, floating decks under a certain height — but rules vary by location.
- Call Before You Dig: Before you start any digging for your deck footings, it’s not just best practice — it’s the law in many places. Underground utilities like gas, water, electrical, and communication lines may be buried right where you plan to dig.
- Speak with your local council or building inspector to confirm what’s allowed before you start your project.
A little research upfront ensures your deck is safe, compliant, and built to last.
Real-World Examples & User Scenarios
Understanding when to use footings or piers becomes easier when you see how they play out in real-life projects. Here are two common scenarios to help guide your decision:
Floating Deck in the Backyard
You’re building a standalone deck under a tree or in a corner of the yard — not attached to your home, and only a few inches off the ground. Perfect for TuffBlocks.
There’s no need to dig, pour concrete, or wait for anything to cure. Just level the ground, place your TuffBlocks, and start building. It’s a fast, clean, and cost-effective solution — especially if you’re doing it yourself over a weekend.
Elevated Deck Attached to House
You’re planning a deck that connects directly to your back door and sits more than 1.2 meters (4 feet) above ground level. Concrete footings are likely required.
Because it’s a permanent structure with height and connection to your home, building codes will typically call for deeper, more stable foundations. In this case, concrete footings offer the strength and compliance needed for safety and durability.
Conclusion – Which Is Best for You - Deck Piers or Footings?
Both deck piers and concrete footings have their place in the world of decking — it just depends on your project.
- Concrete footings are the traditional go-to for elevated, heavy-duty, or attached decks. They’re strong and compliant, but come with more time, labor, and cost.
- Deck piers, especially TuffBlock, are ideal for floating, ground-level, or DIY builds. They offer a lightweight, fast-install alternative without sacrificing structural integrity in the right setting.
Our Recommendation?
If you’re working on a low-profile deck that’s freestanding and under 1.2m in height — TuffBlock is the smarter, faster choice. For high, attached, or load-heavy decks, concrete footings remain the best long-term foundation.
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