Faster Deck Block Foundations
- Without Digging or Concrete

A lightweight deck foundation system that replaces traditional concrete deck blocks - faster to install, easier to handle, and ideal for floating decks and height-restricted builds.

America's Favorite

The Original Trusted Deck Block &
Foundation System

ICC Certified Deck Foundation System

150K+ Real Builds

Rated 4.9/5 stars by DIYers & contractors

25 year warranty guarantee 

Trusted for Decks, Sheds & Floating Foundations

TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)
TuffBlock (8 Pack or 24 Pack)

TuffBlock (8 Pack or 24 Pack)

Sale price $95.95 Free Shipping. Made in America.
/
Tax included.

26553 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 fastest, 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

Low-profile deck foundation system allowing floating decks as low as 6 inches above ground

low-profile deck foundation  

Ideal for builds that need to sit flush with door thresholds or where digging isn’t possible.

UV-stabilized deck block that resists cracking, water absorption, and harsh outdoor conditions

Weather & UV resistant

Won’t crack or absorb water & UV-stabilised to withstand harsh conditions

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Installs on almost
any surface

Works on soil, gravel, turf, or pavers - no concrete deck footings required. 

Versatile deck foundation block compatible with traditional concrete footings and pier systems

Versatile

can also be used as an intermediary solution when used in combination with traditional in-ground concrete methods.

TuffBlock by BuildTuff logo

TuffBlock Deck Block Explained in 90 Seconds

ICC Certification: 2021 & 2018 International Building Code (IBC) 2021 & 2018 International Residential Code (IRC).

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TuffBlock - Another BuildTuff System

Engineered smart. Built tougher.

How to Install Deck Blocks in 3 Simple Steps

Ideal for floating decks, shed foundations, stairs, and low-clearance deck builds.

Preparing ground for a floating deck foundation by leveling soil before placing deck blocks1

Prepare Ground

Prepare the ground for your floating deck by removing loose top soil or vegetation. Compact the ground with a tamp, and consider using aggregate like crushed rock or paver base.

Timber deck frame laid out over deck footing blocks without digging2

Layout Frame

Build the outer frame so it is level and square, then position TuffBlock deck blocks under the joists based on your lumber’s allowable spans to create a strong, stable foundation.

Completed floating deck built using deck foundation blocks for low-profile installation3

Install Deck Boards

Finish by installing deck boards over your deck block foundation with spacing for airflow, and complete the outer section using fascia to hide the TuffBlocks for a seamless finish.

Why Builders Replace Concrete Blocks with TuffBlock

TuffBlock lightweight deck footing block vs heavy concrete deck block for floating decks

TuffBlock

✔ 27× lighter & supports 1,700+ lbs per block
✔ UV-stable, corrosion-proof
✔ 25 year warranty
✔ Low deck height of 6"
✔ Does not absorb water
✔ Accepts posts, joists & bearers
✔ Stackable & easy to transport 

Concrete Block 

✘ Heavy & labour intensive
✘ Can crack or degrade
✘ No warranty
✘ Minimum deck height of 11-18"
✘ Absorbs water
✘ Often requires cutting & grinding for lumber fit
✘ Bulky & difficult to transport  

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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.”

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Russell (Shedscape)

“TuffBlocks let us build perfectly level shed foundations on sloping yards - faster, cleaner, and more professional than concrete.”

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Justin (DIY) 

"Strong, easy to use, and helped save me tons of time and energy building the frame of our deck!" 

Trusted by Pros, Built for DIY

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As seen on leading TV networks and building influencers.

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Wood Bully Design & Build logo
Channel 7 Two logo
BYOT logo
AWA logo
HM logo

Watch real decks, sheds, stairs and more built using deck foundation blocks.

TuffBlock Deck Block available at Lowe’s
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Frequently Asked Questions

Availlable Online & In-Store

Tuffblock available in Lowes
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Availlable Online & In-Store

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.

What others say

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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.

Shop Now
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Built To last

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