Build Faster Deck Foundations
- Without Digging or Concrete
A lightweight, above-ground foundation system that replaces traditional concrete deck blocks - faster to install, easier to handle, and ideal for both standard and restricted builds.
Perfect for everyday decks, sheds, and low-clearance builds - including sites where digging isn’t possible.
See if TuffBlock is Right For Your ProjectShop TuffBlockIs TuffBlock Right for Your Build?
TuffBlock is designed to replace traditional concrete deck blocks in most floating deck and shed builds - with added advantages on more challenging sites.
- Standard floating decks and platforms
- Sheds and small structures
- Low-clearance or height-restricted builds
- Builds over existing concrete
- Sites with underground services
ICC Certified & Builder Ready
150K+ Real Builds
Rated 4.9/5 stars by DIYers & contractors
25 year warranty guarantee
Why Builders Replace Concrete with TuffBlock
TuffBlock
✔ 27× lighter but same strength rating
✔ 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
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
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.”
Russell (Shedscape)
“TuffBlocks let us build perfectly level shed foundations on sloping yards - faster, cleaner, and more professional than concrete.”
Justin (DIY)
"Strong, easy to use, and helped save me tons of time and energy building the frame of our deck!"
See TuffBlock Installed in Real Builds
How Many TuffBlocks Do You Need?
Instant estimate. No email required.
Enter your deck dimensions in metres. We’ll estimate the number of TuffBlocks and packs required.
The number of TuffBlocks required is based on 450mm centers when calculated.
Check local building regulations for required material, sizes and spacing.
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.
Specifications & Dimensions
| Product Dimensions | Size & Weight |
|---|---|
| Width | 90mm |
| Height | 50mm |
| Length | 300mm |
| Weight | 680g |
Frequently Asked Questions
How to Build Easy With TuffBlocks
Drop
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.
Level
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.
Build
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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Engineered smart. Built tougher.
