Concrete-Free Deck Foundations & Plastic Deck Blocks
Instant deck footings without digging or concrete - ideal for ground-level decks, sheds and pergolas.
⭐⭐⭐⭐⭐ Trusted across 150,000+ DIY and contractor projects worldwide.
Free Shipping • ICC-Rated • 25 year warranty
Why Builders & DIY Choose TuffBlocks
Lighter & Faster on Site
Up to 27× lighter than concrete. Easier to transport, stage, and install.
Consistent Fit, No Site Workarounds
Designed to work with real timber sizes - no cutting or grinding.
Built for Real-World Conditions
Won’t absorb water, crack, or degrade in wet or unstable ground.
True Low-Level Deck Builds
Build true low-level decks (as low as 150mm) - no digging, no concrete.
Proven in Real Builds
Trusted across 150,000+ DIY and contractor projects worldwide.
How Many TuffBlocks Do You Need?
Instant estimate. No email required.
Enter your deck dimensions in feet. We’ll estimate the number of TuffBlocks and packs required.
The number of TuffBlocks required is based on 16 inch centers when calculated.
Check local building regulations for required material, sizes and spacing.
Brian P.
Builder
"Super easy to install - deck feels rock solid"
Gary R.
DIY
"Saved me time, the hassle and mess of extra digging, money and back ache."
Ray F.
DIY
"Strong, easy to use, and helped save me tons of time and energy building the frame of our deck!"
Specifications & Dimensions
| Product Dimensions | Size & Weight |
|---|---|
| Width | 3.5" |
| Height | 2" |
| Length | 12" |
| Weight | 1.5lbs |
See How TuffBlock Works (90 Seconds)
How does TuffBlock compare?
TuffBlock
✔ 26× lighter & faster install
✔ UV-stable, corrosion-proof
✔ 25 year warranty
✔ Low deck height of 6"
✔ Does not absorb water
Concrete Block
✘ Heavy
✘ Can crack or degrade
✘ No warranty
✘ Minimum deck height of 12–18"
✘ Absorbs water
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.
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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