Lightweight, load-rated Foundation system

Build Without Digging Or Concrete

✔ 27x lighter than concrete
✔ Supports up to 770kg per block
✔ Break-tested to 5000kg
✔ Made in the Australia from 100% recycled materials

Engineered for strength. Trusted in 150,000+ real builds.

Shop TuffBlock Now

Free Shipping. Available online & at Bunning's nationwide.

Used by Builders & DIYers across Australia

Engineered to Meet Australian Building Standards

25 Year warranty

Rated 4.9/5 stars 

Start Your Build Today

Free Shipping. Available online & at Lowe’s nationwide.

✔ Supports up to 1,700 lbs per block
✔ 27x lighter than concrete
✔ Build in hours, not days like concrete

Engineered for strength. Trusted in 150,000+ real builds. 

Start Your Build Today

Free Shipping USA Wide.

✔ Supports up to 1,700 lbs per block
✔ 27x lighter than concrete
✔ Build in hours, not days like concrete

Engineered for strength. Trusted in 150K+ builds. 

Shop Now

Free Shipping USA Wide

Used by DIYers & contractors across America

ICC Certified

Rated 4.9/5 

25 year warranty 

Build smarter. Build lighter.
Build with confidence.

Used by DIYers & builders across America

ICC Certified

Rated 4.9/5 

25 year warranty 

Christopher Liam W.

DIY

"It's a fantastic product that made life in a difficult situation easy."

Kovacs Carpentry

Builder

"Excellent product! We are decking builders, and since we started using BuildTuff, it makes our jobs easy and faster. Highly recommended."

Allan B.

DIY

“Very easy to use, and I loved that I didn't have to dig holes. I will be using this product when ever I can.”

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)

TuffBlock (12-pack)

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

985 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.

Build decks as low as 6"

Won’t crack, chip or corrode

Made in AUSTRALIA

How to Install Deck Blocks in 3 Simple Steps

Ideal for floating decks, shed foundations, stairs, and low-clearance deck builds.

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

Prepare Your Base

Prepare the ground by removing loose topsoil or vegetation. Compact the ground with a tamp, and consider using aggregate like crushed rock or paver base.

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

Place & Level TuffBlocks

Position TuffBlocks directly on your prepared surface and adjust each point to create a level foundation. Their wide base and smart design distribute load evenly – even on uneven or sloped ground.

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

Build Your Frame & Deck

Install your joists directly into the TuffBlock slots and begin building immediately. No curing time, no delays – just a strong, stable foundation ready to go.

Check local council requirements for: Decks attached to your home and structures more than 1 metre above ground level.

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Specification Instant Foundation System
DimensionsWidth 90mm, Height 50mm, Length 300mm
Weight680 grams
MaterialHigh strength closed loop recycled polyolefin material with an ultra-high UV rating
Load Rating770 kilograms
Stirrup WidthSuits 35-41mm or 41-47mm joists and bearers as well as 90x90mm or 100x100mm posts
TuffBlock - Another BuildTuff System

Engineered smart. Built tougher.

Availlable Online & In-Store AT

BuildTuff Tuffblock decking blocks at Bunnings

Availlable Online & In-Store AT

BuildTuff Tuffblock decking blocks at Bunnings

4.9/5 Rated by 400+ Builders & DIYers

Available Online & In-Store at

bunnings warehouse logo australia diy home improvement retailer

Why Builders & DIY Replace Concrete with TuffBlock

Traditional footings haven’t changed in decades - until now.

tuffblock-vs-concrete-footings-deck-foundation-comparison-no-digging.webp__PID:86c90acb-18ef-43f2-ae67-94a1bdcc2420

CONCRETE FOOTING

✘ Dig post holes
✘ Mix and pour concrete
✘ Wait days to cure
✘ Risk hitting underground services
✘ Heavy, messy, time-consuming

TUFFBLOCK

✔ Easy to carry & fast to install
✔ No digging required
✔ No concrete or curing time
✔ Build immediately
✔ Lightweight and easy to place
✔ Clean, fast installation

Stop Digging. Start Building

✔ Faster install. Less labour. Better results

Real-World Foundation Comparison

Based on a 12' × 12' floating deck using ~18 blocks

Concrete Footings

~635–907 kgs material handled
9–14 hours setup

✘ Digging & concrete
✘ Heavy labour
✘ Curing time slows your build

Concrete Blocks

~327 kgs handled
2.5–3 hours setup

✘ Heavy lifting
✘ Slower setup
✘ More adjustments

TuffBlock

~12.2 kgs handled
45–70 mins setup

✔ Lightweight
✔ Faster adjustments
✔ Minimal strain

tuffblock-vs-concrete-footings-time-labour-cost-savings-deck-foundation.webp__PID:f4d1dd7d-81c0-4c1e-be00-574e8f26a5edtuffblock-vs-concrete-footings-time-labour-cost-savings-shed for-foundation.webp__PID:073781e9-8820-4d23-b678-b413c9bb3e5c

*Compared to traditional concrete footings

TuffBlock lightweight deck foundation block compared to concrete, showing no digging alternative for deck builds
  • Won’t crack, chip or corrode like concrete   
  • UV-stabilised 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 

Other Alternatives on the Market

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TuffBlock

✔ Load rated and tested
✔ Proven with 150K+ real bulds & zero warranty claims
✔ Break tested under high stress
✔ Manufactured using structural-grade polymer
✔ UV-stabilized for outdoor durability
✔ Designed with weight distribution geometry
✔ 25 year warranty
✔ Made Australia

Unverified Imitators

✘ Unverified overseas imports
✘ Do not publish verified load ratings
✘ Do not provide break testing data
✘ No certification
✘ Use unknown material composition
✘ Offer limited traceability or warranty

Built to Handle Australian Conditions

Expansive Soils?

Ground movement can crack concrete footings, while TuffBlocks sit on a compacted gravel base and adapt to natural movement without damage.


✔ Helps accommodate natural soil movement

Heavy Rain or Drainage?

Concrete footings can trap moisture, while TuffBlocks sit on a gravel base with raised bumps to improve drainage and reduce moisture contact.


✔ Ideal for wet conditions

High Wind?

Structures in high-wind areas can be secured with earth anchors, while some builders combine TuffBlocks with in-ground footings for extra stability.


✔ Suitable for storm-prone regions when properly anchored

Council Approval?

Building requirements vary between councils, so always check local guidelines before starting your project.


✔ Many small, low-profile structures may not require permits

Stop Digging. Start Building

✔ Built for real-world conditions
✔ Trusted across Australia

REAL-WORLD FOUNDATION COMPARISON

Based on a 3.6 m × 3.6 m floating deck using ~18 blocks

Concrete Blocks

Up to 18 kg per block
Up to 324 kg handled

~8–10 minutes per block
~2.5–3 hours foundation setup

Heavy lifting
Repeated repositioning
Higher physical strain

TuffBlock

0.68 kg per block
~12.2 kg total handled

~2–4 minutes per block
~45–70 minutes foundation setup

Lightweight
Fast adjustments
Minimal strain

Watch real decks, sheds, stairs and more built using deck foundation blocks.

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

Floating deck built using Tuffblocks
Shed built using Tuffblocks
Stairs & Landings Built using BuildTuff
Treehouse DIY built using Tuffblocks footings
Walkway built using Tuffblock foundation footings
Low-Profile deck built using tuffblocks as foundation footings

As seen on leading TV networks and building influencers.

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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

FREQUENTLY ASKED QUESTIONS

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 overheads 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.

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.

Shop Now
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Built To last

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

Australia Wide Shipping

We deliver across Australia with Free Shipping.

Our Guarantee

We're so confident in our products and service, we offer a 25 year warranty on your TuffBlocks

Support

We're building a smarter building community. Contact Us anytime, we would love to help!