TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock
TuffBlock

TuffBlock

Regular price Sale price $287.50 Free Shipping. Made in America.
/
Tax included.

234 in stock

Size

TuffBlock is an instant deck foundation system designed to replace traditional concrete deck blocks for ground-level and low-profile builds.

Instead of heavy, fixed-dimension concrete blocks, TuffBlock provides a lightweight, durable foundation that installs directly on prepared ground — eliminating digging, mixing, and curing while delivering consistent, reliable support.

Used by DIYers and professional builders alike, TuffBlock is ideal for decks, sheds, pergolas, and other outdoor structures where speed, flexibility, and predictable results matter.

Brian P.

Builder

"Super easy to install - deck feels rock solid"

Gary R. 

DIY

 "Saved me time, the hassle and mess of extra digging, money and back ache."

Ray F. 

DIY

"Strong, easy to use, and helped save me tons of time and energy building the frame of our deck!" 

ICC Certified & Builder Ready

150K+ Real Builds

Rated 4.9/5 stars by DIYers & contractors

25 year warranty guarantee with 0 warranty claims

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Made in USA 

Why Builders Are Replacing Concrete Deck Blocks with TuffBlock

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Dramatically less weight on site

Concrete deck blocks are heavy and awkward to transport. TuffBlock is lightweight and stackable - easier on crews, vehicles, and job sites.

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Consistent fit with real-world lumber

Concrete blocks are cast to fixed dimensions. TuffBlock is engineered to accommodate real lumber variation, wet timber, and undersized posts without site modification.

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Better performance in wet or unstable conditions

Concrete absorbs moisture and can crack or degrade over time. TuffBlock won’t absorb water, won’t crack, and maintains performance in harsh weather conditions.

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Cleaner installs and fewer site compromises

No cutting, grinding, or shimming concrete blocks to make things fit - resulting in faster, cleaner installs and more predictable outcomes.

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True Low-Profile Builds Without Workarounds

Concrete blocks often force higher deck heights. TuffBlock enables true low-clearance builds where concrete simply isn’t practical.

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Proven in real builds - not just lab tests

Trusted across 150,000+ real projects by DIYers and contractors replacing traditional concrete deck blocks.

Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System

Deck Area Calculator & TuffBlock Estimator

Enter your deck dimensions in feet. We’ll estimate the number of TuffBlocks and packs required.

The number of TuffBlocks required is based on 16 inch centers when calculated.
Geometric calculations only (imperial).
Check local building regulations for required material, sizes and spacing.

TuffBlock - Another BuildTuff System

Real Projects Built on TuffBlocks

Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System for Building a Shed
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System for Building a Shed
Deck Block, Instant foundation system, BuildTuff, TuffBlock, Concrete Deck Block, Builder, Renovation, DIY, Do It Yourself, Build A Deck, Decking, Deck Footing, Instant Foundation System for Building a Shed

How does TuffBlock compare?

TuffBlock vs concrete decking block Foundation system

TuffBlock

✔ 26× lighter & faster install
✔ UV-stable, corrosion-proof
✔ 25 year warranty
✔ Low deck height of 6"
✔ Does not absorb water

Concrete Block 

✘ Heavy
✘ Can crack or degrade
✘ No warranty
✘ Minimum deck height of 12–18"
✘ Absorbs water

Contractor & DIY Review

Site Built Sheds (Charlotte, NC) 

 Jerry from Site Built Sheds uses TuffBlocks on every job because they’re faster, lighter, and more reliable than concrete.

Justin & Jess DIY (Nashville, Tennessee)

“As a first-time DIYer, TuffBlocks were a game-changer. They made the whole deck project simple and straightforward.”

Built for the Jobsite 

Forget hauling heavy blocks or waiting days for concrete to cure.
With TuffBlock, you can:

Cut install times in half — crews can frame the same day.
Keep overhead low — reduce transport costs and back-breaking labor.
Work anywhere — on uneven soil, turf, or pavers with a little leveling.
Deliver lasting builds — backed by a rock-solid 25-year warranty.

  • Cut install times in half — crews can frame the same day.
  • Keep overhead low — reduce transport costs and back-breaking labor.
  • Work anywhere — on uneven soil, turf, or pavers with a little leveling.
  • Deliver lasting builds — backed by a rock-solid 25-year warranty.

What others say

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Frequently Asked Questions

How to Build Easy With TuffBlocks

1

Drop

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Place your TuffBlocks directly onto firm, level ground — grass, dirt, gravel, or even concrete. No need to dig holes or pour footings. Just space them where your posts or joists will go.

2

Level

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Use a spirit level to make minor ground adjustments if needed. TuffBlocks work best on flat, stable surfaces — and minimal prep is all it takes. Tip: Use packers such as crusher dust underneath for extra stability and longevity.

3

Build

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Drop in your 3.5" or 4" posts or 1½" - 2" Joists & Bearers — From here, just start building your deck, shed base, stairs, or even tiny home floor.

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✔️ No curing time. No mess. Build immediately.

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Built To last

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We stand behind every TuffBlock with a rock-solid 25-Year Warranty. 

Prefer to shop in store? Visit

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