Build Easier, Faster:
America's #1 Instant Deck Foundation System
No concrete. No digging. Just smart, tough foundations with TuffBlocks
Built for DIYers, trusted by pros.
⭐️⭐️⭐️⭐️⭐️ Based on 384 reviews
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1000+ decks built with TuffBlocks
Rated 4.9/5 stars by DIYers & contractors
Certified load-tested
"Tuffblocks were exactly as advertised! Strong, easy to use, and helped save me tons of time and energy building the frame of our deck! Website videos and tutorials made this an easy process for my first deck build! Thanks very much!"
- Ray F.
Shop NowWhy DIY & Builders Love TuffBlock
Lightweight but supports up to 1,700lb.
Works on grass, soil, pavers, concrete & sand.
Made from high-strength UV stabilised recycled materials.
Built in water channels to prevent moisture wood rot
Deters Termites, Ants, Silverfish & Other Pests
Builds decks as low
as 6"
No special tools or trade skills required.
Available online or
in store at
Hundreds of Happy DIYers & Contractors (and Counting!)
Popular item - limited Stock Available
"Using TuffBlocks was a game changer . Made the job easier, faster and less stressful. It’s like Lego blocks but for adults." - Duncan C
The Instant Foundation System for Decks, Sheds, Walkways & More!
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 precision if required.
Build
Drop in your 4” x 4” posts or 2” x 4” bearers — TuffBlock fits most standard timber and composite framing sizes. From here, just start building your deck, shed base, stairs, or even tiny home floor.
Ready to Build Easy with TuffBlock?
| Specification | Instant Foundation System |
|---|---|
| Dimensions | Width 11.81", Height 3.54”, Length 11.81” |
| Weight | 1.5lbs |
| Material | High strength closed loop recycled polyolefin material with an ultra-high UV rating |
| Material Color | Black |
| Load Rating | 1,700 lbs |
| Stirrup Width | Suits 1½ - 2-inch joists and bearers, 3½ x 3½ inch or 4 x 4-inch square posts |
| ICC Certification | 2021 & 2018 International Building Code (IBC) 2021 & 2018 International Residential Code (IRC) |
"Very happy with the product! Extremely easy to work with! More costly than going with bricks or conventional deck blocks. Especially worth it for the ease-of-use / lightweight and portability. Very easy for assembling an on-grade deck."
- Michael G.
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USA Wide Shipping
We deliver across the USA with Free Shipping
Our Guarantee
We're so confident in our products and service, we offer a 25 year warranty on your TuffBlocks.
Support 24/7
Question? We would love to hear from you! Contact us anytime.
