Australia's Favourite & Most Trusted Deck Block

Build Deck Foundations Without Digging or Concrete

Meet TuffBlock - the lightweight foundation system for decks, sheds, patios, and backyard builds. Designed for easier, faster decks without digging, special tools or lugging heavy concrete blocks.

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

Build smarter. Build lighter. Build with confidence.

Shop Now

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

Build smarter. Build lighter.
Build with confidence.

Meet TuffBlock - the lightweight foundation system for decks, sheds, patios, and backyard builds. Designed for easier, faster decks without digging, special tools or lugging heavy concrete blocks.

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

Shop Now

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

Build smarter. Build lighter.
Build with confidence.

Build smarter. Build lighter. Build with confidence.

Engineered to Meet Australian Building Standards

150K+ Real Builds

Rated 4.9/5 stars by DIY & contractors

25 year warranty guarantee 

Trusted for Decks, Sheds & Floating Foundations

Engineered to Meet Australian Building Standards

150K+ Real Builds

Rated 4.9/5 stars by Pros & DIY 

25 year warranty guarantee 

Trusted for Decks, Sheds & Floating Foundations

START YOUR BUILD TODAY

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.

172 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.

Ready to Build But Not Sure How Many Deck Blocks you need?

Availlable Online & In-Store AT

BuildTuff Tuffblock decking blocks at Bunnings

Availlable Online & In-Store AT

BuildTuff Tuffblock decking blocks at Bunnings

Built to Handle Australian Conditions

Expansive Soils?

Ground movement can crack traditional concrete footings.

TuffBlocks sit on a compacted gravel base, allowing natural movement without damage.


✔ Helps accommodate natural soil movement

Heavy Rain or Drainage?

Concrete footings can trap moisture and cause pooling.

TuffBlocks sit on a gravel base and have small raised bumps that help lift the structure off the surface, improving drainage and reducing moisture contact.


✔ Ideal for wet conditions

High Wind?

Structures in high-wind areas can be secured with earth anchors.

Builders may also combine TuffBlocks with in-ground footings for extra stability.


✔ Suitable for storm-prone regions when properly anchored

Council Approval?

Building requirements vary between councils across Australia.

Always check local guidelines before starting your project.


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

WHAT DIY & Builders Say

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ONE FOUNDATION. MULTIPLE BUILD OPTIONS.

Tuffblock deck blocks for Ultra-low profile decks

Ultra-low profile decks

Tuffblock deck blocks for Raised decks.

Raised decks

Tuffblock deck blocks for Raised decks for variable height decks

Variable height decks

Tuffblock deck blocks for Raised decks for intermediate footing decks

Intermediate footing decks

Perfect for: Floating decks, low-profile builds, sheds, cubby houses, platforms, walkways & more.

TuffBlock works on almost any surface including soil, gravel, turf, or pavers.

Shop TuffBlock Now

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

Why Builders Replace Concrete with TuffBlock

TuffBlock vs concrete decking block Foundation system.png__PID:5be48b18-5f75-43ef-bc12-8e2cdda2b2e5

CONCRETE BLOCK

✘ Heavy & labour intensive
✘ Can crack or degrade
✘ No warranty
✘ Minimum deck height of 300–450mm
✘ Absorbs water
✘ Often requires cutting & grinding for lumber fit

TUFFBLOCK

✔ Easy to carry & fast to install
✔ UV-stable, corrosion-proof
✔ 25 year warranty
✔ Low deck height of 50mm
✔ Does not absorb water
✔ Fits real world lumber variation for posts, joists & bearers

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

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

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Ready to Build Your Next Project?

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

TuffBlock is Built for Modern Low-Profile Decks

Today’s homes feature:

Flush sliding doors
Minimal step-down transitions
Tight threshold clearances

Bulky concrete blocks were never designed for these constraints.

TuffBlock allows decks to sit approximately 150mm above grade, making it ideal for low-profile applications.

Low profile floating deck installed using TuffBlock deck blocks beneath timber framing near exterior doors for tight clearance builds
Low profile floating deck framing supported by TuffBlock deck blocks installed directly on an existing concrete slab beside a sliding door for tight clearance builds
Low level timber deck frame supported by TuffBlock deck blocks installed along a narrow garden pathway without concrete footings
Ground level floating deck build using TuffBlock supports installed above prepared surface for fast installation
Timber floating deck frame supported by TuffBlock deck blocks installed on compacted gravel base for low profile construction
Floating deck frame supported by TuffBlock foundation blocks installed above ground beside a pool during deck construction

As seen on leading TV networks and building influencers.

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How to Install Deck Blocks in 3 Simple Steps

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

Preparing compacted ground for floating deck foundation using TuffBlock deck blocks before frame installation1

Prepare Ground

Prepare the ground for your floating deck by removing loose top soil or vegetation. Compact the ground with a tamp, and consider using aggregate like crushed rock or paver base.

Laying out timber deck frame positioned on TuffBlock deck foundation blocks for floating deck construction2

Layout Frame

Build the outer frame so it is level and square, then position TuffBlock deck blocks under the joists based on your lumber’s allowable spans to create a strong, stable foundation.

Completed floating deck built using TuffBlock deck foundation blocks showing low profile outdoor structure3

Install Deck Boards

Finish by installing deck boards over your deck block foundation with spacing for airflow, and complete the outer section using fascia to hide the TuffBlocks for a seamless finish.

Not all deck blocks are built the same

TuffBlock vs adjustable decking pier block Foundation system

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 in the Australia

Unverified Imitators

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

TUFFBLOCK CALCULATOR

HOW MANY TUFFBLOCKS DO YOU NEED?

Input the length and width of the deck, then press Enter.

Please wait. Calculator loading...
Deck Length (m)Deck Width (m)Deck Area Calculator (m2)Estimated TuffBlocks
22410
33921
441636
552544
663665
774996
8864108
9981140
1010100176

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

Input the length and width of the deck, then press Enter.

Please wait. Calculator loading...
Deck Length (m)Deck Width (m)Deck Area Calculator (m2)Estimated TuffBlocks
22410
33921
441636
552544
663665
774996
8864108
9981140
1010100176
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TuffBlock - Another BuildTuff System

Engineered smart. Built tougher.

Watch Real Builds with TuffBlocks

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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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!