Instant Deck Foundations - No Concrete, No Digging

Lightweight, high-strength deck blocks for faster, easier foundations for decks, sheds & more.

Instant Deck Foundations - No Concrete, No Digging

 Lightweight, high-strength deck blocks for faster, easier foundations for decks, sheds & more.

ICC Certified & Builder Ready

150K+ Real Builds

Rated 4.9/5 stars by DIYers & contractors

25 year warranty guarantee with 0 warranty claims

Trusted by Aussie Builders & DIYers

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. Made In Australia.
/
Tax included.

160 in stock

TuffBlock is a lightweight, high-strength alternative to concrete deck blocks, engineered to support over 770 kg per block and break-tested to 5,000kg.

It fits standard timber sizes including 90-100mm for posts & 35-41mm or 41-47mm for joists.

TuffBlocks install on almost any surface and are Australian made from recycled materials.

Free Shipping Australia-wide. 

PLEASE NOTE THAT THESE ARE ONLY SOLD IN QUANTITIES OF 12 

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

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Geometric calculations only (metric). The number of TuffBlocks required is based on 450 mm centers when calculated. 
Minimum input: 1 | Maximum input: 10
For further clarifications, please view our Master FAQ or Contact Us for more information.

TuffBlock - Another BuildTuff System

Why Builders & Pros Choose TuffBlock

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26× lighter than concrete

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Supports 770kg per block & break-tested to 5,000kg

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Fits real lumber variation. 90-100mm for posts & 35-41mm or 41-47mm joists. 

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Build decks as low as 150mm

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Made in Australia from recycled materials

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Won’t crack or absorb water & UV-stabilised to withstand harsh conditions 

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 Ground Level Deck
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 Pyramid stairs
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

How do TuffBlocks Compare?

TuffBlock vs concrete decking block Foundation system

TuffBlock

✔ 26× lighter & faster install
✔ UV-stable, corrosion-proof
✔ 25 year warranty
✔ Low deck height of 150mm
✔ Does not absorb water

Concrete Block

✘ Heavy
✘ Can crack or degrade
✘ No warranty
✘ Minimum deck height of 300-460mm
✘ Absorbs water

What others say

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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.

Frequently Asked Questions

Prefer to buy in store? Visit

BuildTuff Tuffblock decking blocks at Bunnings
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

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. 

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!