Build Easier, Faster:
America's #1 Instant Deck Block Foundation

No concrete. No digging. Just smart, tough deck footings with TuffBlocks
Built for DIYers, trusted by pros.

⭐️⭐️⭐️⭐️⭐️  Based on 400+ reviews

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As seen on

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Free Shipping

1000+ decks built with TuffBlocks

Built to ICC Standards

Rated 4.9/5 stars by DIYers & contractors

Certified load-tested 

"Tuffblocks were 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

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

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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

"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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Ready to Build Easy with TuffBlock?

Deck Length (feet)Deck Width (feet)Deck Area Calculator (sq feet)Estimated TuffBlocks
8129624
201020042
201224042
301030060
201632056
351035072

The number of TuffBlocks required is based on 16 inch centers when calculated.
Geometric calculations only (imperial). Check local building regulations for required material, sizes and spacing.

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

-3184 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

          Prefer to shop in store?



          "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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          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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          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

          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