NO-DIG, INSTANT FOUNDATION SYSTEM

Build Without Digging Or Concrete

(400+)

The no-dig foundation block for floating decks, sheds, pergolas and outdoor structures. No concrete. No curing. No back-breaking labour.

770 KG / BLOCK27 x lighterFAST INSTALLBREAK TESTED TO 770 KG

Compared to concrete footings:

✔ Save 8+ hours ✔ Save $800+ labour
✔ Avoid lifting 600+kgs of material

* Based on a 3.6m x 3.6m floating deck

SHOP NOWCALCULATE TUFFBLOCKS

Good Design Award

Award Winning Product

4.9/5 Rating

400+ Verified Reviews

25-Year Warranty

Industry Leading

At Bunnings Nationwide

In-store & Online

150,000+ Builds

Worldwide

ICC Certified

IBC & IRC Compliant

4.9/5 Rating

432 Verified Reviews

25 Year Warranty

Industry Leading

At Lowe's Nationwide

In-store & Online

TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)
TuffBlock (12-pack)

TuffBlock (12-pack)

Regular price $210.00 Free Shipping • 25 Year-Warranty
/
Tax included.

959 in stock

TuffBlock deck support blocks are a lightweight alternative to traditional concrete deck blocks and deck footings.

Designed for floating decks, low-profile decks and outdoor structures, TuffBlock eliminates digging and concrete.

Each deck block supports over 770kg and installs directly on compacted ground, gravel or soil.

Perfect for:
• Floating decks
• Deck blocks without concrete
• Deck footings without digging
• Shed foundations
• Walkways and outdoor platforms

Made in Australia from recycled materials.

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Jerry & Sierra (Site Built Sheds)

“TuffBlocks have turned building the deck foundation - once one of the hardest, most labor-intensive parts - into a quick, easy process.”

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Russell (Shedscape)

“TuffBlocks let us build perfectly level shed foundations on sloping yards - faster, cleaner, and more professional than concrete.”

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Justin (DIY) 

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

verified customer reviews

What Builders & DIYers are Saying

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Why thousands of builders replace concrete with TuffBlock every year.

FeatureTuffBlockConcrete FootingsConcrete Deck Blocks
Digging RequiredNoYes No
Concrete RequiredNoYesNo
Build Same Day x  
Weight Per Unit680gHeavyHeavy
Low Deck Height xx
No Cutting Or Grinding xx
Won't Crack Or Corrode✔ xx
25-Year Warranty xx

Real-World Foundation Comparison

Based on a 3.6m x 3.6m Floating Deck

Concrete Footings

~640–910 kgs material handled
9–14 hours setup
(+ up to 48 hours curing time)

Concrete Blocks

~330 kg handled
2.5–3 hours setup

TuffBlock

~12 kg handled
45–70 minutes setup

tuffblock-vs-concrete-footings-time-labour-cost-savings-deck-foundation.webp__PID:f4d1dd7d-81c0-4c1e-be00-574e8f26a5ed

*Compared to traditional concrete footings

TuffBlock by BuildTuff logo

One Foundation Block.
Every Build.

TuffBlock is a lightweight, load-rated composite deck block - engineered to replace concrete footings for any low-to-medium profile outdoor structure.

Place it on compacted ground. Level it. Build. Works on soil, gravel, turf, or pavers. Proven on 150,000+ builds worldwide.
 

TuffBlock - Another BuildTuff System

Engineered smart. Built tougher.

TUFFBLOCK CALCULATOR

How Many TuffBlocks Do I Need?

Enter your deck length and width in metres to estimate required TuffBlocks and recommended pack quantities.

✔ Based on 400 mm on-centre spacing
✔ Designed for ground-level floating decks
✔ 150,000+ real builds

Calculator placeholder

Or use our deck block spacing chart below to estimate how many TuffBlocks you need based on common deck sizes.

Deck Length
(metres)
Deck Width
(metres)
Deck Area Calculator
(sq metres)
Estimated
TuffBlocks
22410
33921
441636
552544
663665
774996
8864108
9981140
1010100176
Build this weekend

Free Shipping Australia Wide

Available Online & at Bunnings Warehouse Nationwide

We Had TuffBlocks Independently
Tested to Destruction.

20x

Higher Peak Compression Load

View Test Results

How to Install TuffBlocks in 3 Simple Steps

Preparing ground for deck foundation using TuffBlock on compacted gravel base without digging or concrete1

Prepare Your GROUND

Remove loose topsoil or vegetation. Compact the ground. Add crushed rock or paver base for extra stability.

Placing and leveling TuffBlock deck foundation blocks on gravel base for fast deck installation2

Place & Level TuffBlocks

Position blocks on your prepared surface. The wide base and smart geometry distribute load evenly.

Building deck frame on TuffBlock foundation system without concrete footings or digging3

Build Your Frame & Deck

Install joists or posts into TuffBlock slots and begin building immediately. No waiting. No curing. Start today.

TuffBlock is designed for freestanding structures not attached to your home, such as low-set floating decks and platforms. Height limits and permit requirements vary by state and council, always check with your local council before building.

25

Years Warranty

150K+

Builds Worldwide

0

Warranty Claims

Decks, Sheds & More Built With TuffBlock

Click on any of the below to see real decks, sheds, stairs and more built using BuildTuff's TuffBlock foundation blocks.

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tuffblock-shed-base-foundation (1).webp__PID:cd652312-ebca-4d13-bcd3-b6c4ea5fadac
tuffblock-stairs-landing-foundation (1).webp__PID:6d66d0a8-2125-4b00-9484-d9d75cea691d
tuffblock-treehouse-foundation (1).webp__PID:87125349-da35-43cc-b9a2-735a2bbda02a
tuffblock-walkway-foundation (1).webp__PID:2e43a869-a67e-4235-8610-6ba8b2fbd2dd
low-profile-deck-tuffblock-foundation (1).webp__PID:0750298e-a942-47df-aad0-b91400c31e98
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  • Won’t crack, chip or corrode like concrete   
  • UV-stabilized for long-term outdoor use
  • Made from high-strength recycled polyolefin
  • Ventilated underside prevents moisture build-up
  • Designed to deter termites & protect timber
  • Works on uneven terrain, grass, soil, or concrete 

Frequently Asked Questions

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