Build Faster Deck Foundations
- Without Digging or Concrete
A lightweight, above-ground foundation system that replaces traditional concrete deck blocks - faster to install, easier to handle, and ideal for both standard and height restricted builds.
America's Favorite
The Original Trusted Foundation Bock
ICC Certified & Builder Ready
150K+ Real Builds
Rated 4.9/5 stars by DIYers & contractors
25 year warranty guarantee
Trusted by American Builders & DIYers
Versatile
can also be used as an intermediary solution when used in combination with traditional in-ground concrete methods.
Weather & UV resistant
Won’t crack or absorb water & UV-stabilised to withstand harsh conditions
Installs on almost
any surface
Works on soil, gravel, turf, or pavers.
Builds decks as low as 6"
great for areas you can't dig including on top of tree roots & electrical.
Explained in 90 Seconds
ICC Certification: 2021 & 2018 International Building Code (IBC) 2021 & 2018 International Residential Code (IRC)
Engineered smart. Built tougher.
Simple Foundation Steps
1Prepare Ground
Prepare the ground by removing any loose top soil or vegetation. Compact the ground with a tamp, and consider using aggregate like crushed rock or paver base.
2Layout Frame
Build the outer frame to get level and square. Then fill in the cross joists with TuffBlocks spaced in accordance with the allowable spans for your lumber.
3Install Deck Boards
Finish off by installing deck boards with spacing for airflow, and complete the outer section using fascia to hide the TuffBlocks for a seamless finish.
Why Builders Replace Concrete with TuffBlock
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
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.”
Russell (Shedscape)
“TuffBlocks let us build perfectly level shed foundations on sloping yards - faster, cleaner, and more professional than concrete.”
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
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.
As seen on:
Watch Real Projects Built on TuffBlocks
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.
Availlable Online & In-Store
Availlable Online & In-Store
