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.
 

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Why DIY & Builders Love TuffBlock

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

No digging. No concrete. No drying time.

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

Lightweight but supports up to 1,700lb.

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Works on grass, soil, pavers, concrete & sand.

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Made from high-strength UV stabilised recycled materials.

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Built in water channels to prevent moisture wood rot

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Deters Termites, Ants, Silverfish & Other Pests

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

Builds decks as low
as 6"

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No special tools or trade skills required.

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Built To last

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We stand behind every TuffBlock with a rock-solid 25-Year Warranty. 

Available online or in store at

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Hundreds of Happy DIYers & Contractors (and Counting!)

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Join 100's of Happy Customers

Popular item - limited Stock Available

The Instant Foundation System for Decks, Sheds, Walkways & More! 

"Using TuffBlocks was a game changer. Made the job easier, faster and less stressful. It’s like Lego blocks but for adults." - Duncan C

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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.

What about extreme weather? 

Because TuffBlocks are surface-mounted and not buried, they actually help mitigate the effects of frost heave. With proper base prep — such as crusher dust or gravel — drainage is improved, and the risk of movement is significantly reduced.

For areas with high winds or hurricanes, TuffBlocks can still be used. As with any surface-mounted deck system, the key is anchoring. For peace of mind, use ground anchors or hurricane-rated tie-downs, and always check with your local building code or a structural engineer for additional support needs.

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✔️ No curing time. No mess. Build immediately.

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Ready to Build Easy with TuffBlock?

Specification Instant Foundation System
DimensionsWidth 11.81", Height 3.54”, Length 11.81”
Weight1.5lbs
MaterialHigh strength closed loop recycled polyolefin material with
an ultra-high UV rating
Material ColorBlack
Load Rating1,700 lbs
Stirrup WidthSuits 1½ - 2-inch joists and bearers, 3½ x 3½ inch
or 4 x 4-inch square posts
ICC Certification2021 & 2018 International Building Code (IBC)
2021 & 2018 International Residential Code (IRC)
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An environmentally Sustainable Choice

TuffBlocks are 100% recycled and recycable! 



"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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Regular price Sale price $264.95 Free Shipping. Made in America.
/
Tax included.

-3239 in stock

Size

TuffBlock is the world’s fastest growing foundation method for a range of home improvement projects, including raised or low-profile decks, walkways, cubby houses, and much more. TuffBlock removes the need for digging holes and pouring concrete, making it the easiest and most versatile foundation system on the market.

- Accepts 3.5" x 3.5" or 4" x 4" Posts
- Accepts 1½" - 2" Joists & Bearers
- Each TuffBlock is load rated for 1700lbs

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          Frequently Asked Questions

          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

          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

          We're building a smarter building community. Contact Us anytime, we would love to help!

          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