Do I need council approval to build with TuffBlock deck blocks?

As building guidelines change from shire to shire, we always recommend checking your local guidelines before commencing construction — and getting the thumbs up before starting your project. Unfortunately, there is no single “golden rule” answer. That said, many councils have exemptions for structures under a certain size (e.g., 108 sq ft), not attached to the house, and under a certain height. Your structure may not require approvals.

How high can I build using TuffBlocks as the foundation?

TuffBlocks have been engineered for structures up to 36" above ground. Having said this, many people have built structures higher than this using the composite foundation method (TuffBlocks in combination with concrete-in-ground footings). We recommend that you consult with a qualified builder or engineer regarding your project.

Can I use TuffBlocks in high wind areas (Cyclones, Hurricanes, Storms etc)?

Yes, you can use TuffBlocks in high wind areas (cyclones, hurricanes, storms, etc.), but we recommend checking with your local building authority first. Some TuffBlock users choose to use an intermediary solution in high wind areas, meaning they use TuffBlocks in combination with concrete-in-ground footings, or use earth anchors to tie their project down.

What if I have ground movement in my area – clay/sandy soils?

TuffBlock uses a floating foundation system designed to let your structure move slightly with natural ground movement. This helps prevent the stress and cracking you often see in fixed, concrete-in-ground foundations.

Is TuffBlock suitable for Frost Heave conditions?

Yes. The Floating Foundation System was developed for northern (USA) regions where freeze–thaw ground movement is a major issue for traditional “dig a hole and pour concrete” structures. The system was originally created for regions with extreme freeze–thaw cycles where the ground becomes too hard to dig and traditional fixed footings fail because they can’t flex with seasonal expansion and contraction. By “floating” instead of being locked into the ground, TuffBlock helps keep your deck or structure safer, more stable, and longer-lasting.

Can I use TuffBlocks on sloping ground?

Yes — simply level the ground under each TuffBlock, then level the structure above using extension posts supported by the pocket of the TuffBlock below. Refer to the installation guide for more detail. Alternatively, if the surface is sloping at a severe angle, it may be worth considering an alternative support/footing/foundation.

Start Your Build Today

TuffBlock Packs

Name: TuffBlock Packs
Brand: BuildTuff USA
SKU: TUFFB08
Price: 95.95 USD
Availability: InStock

$95.95 12 USD per block • Free Shipping • Made in USA

Tax included.

Size

8 Pack

24 Pack

Quantity

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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

Richard W.

Great product! I can’t wait for the weather to clear (Spring in the Rockies) to start my project. These are going to be perfect.

Lucas M.

Loved working with this product, saved me a lot of time and aggravation, final product couldn’t make me any happier.

EbedMelec M.

No comments as of yet.

Gary R.

This is a great product. Saved me time, the hassle and mess of extra digging, money and back ache.

BRIAN J.

Very easy to use, made my project much easier then using concrete. Have another shed to build and will absolutely be using tuffblocks again.

BRIAN

I think this is a great product, I like the versatility and ease of installation . I just wish they sold them in different size packages.

Pamela N.

I'm 74 and fit but I wasn't able to use conventional foundation material. Tuffblocks made my shed foundation a breeze. Thank you!!

Dan N.

This is the second time I have used TuffBlock, the first was on a free standing 14' x 20' deck. it has not moved since the day we finished it. Urgent project is a 16' x 24' workshop. Love the product and the customer support is excellent. will continue to use and recommend this product.

C T.

I just want to say thank you to the creators of this product. It was the best choice for me to embark on the journey of building this deck. I am amazed at what I was able to accomplish and it is sturdy. I will be adding anchors as we can get some heavy duty storms in my area but I love it so far.

Michael E.

I really like the simplicity and flexibility of the product.

Lisa C.

These are very sturdy and have a wide footprint. Great product

Bradley B.

Very easy to use and build with.

Tim d.

Shed Builder in Griffith, Indiana we use all the tough blocks for our Sheds

Joel J.

Perfect for my project.

Jacob V.

Loved using TuffBlock, super easy to use, deck feels rock solid. Helped us build a beautiful deck in a difficult spot.

Bruce K.

I haven’t started the project yet. Check back with me in a month

Ocairi R.

We’ve watched videos of people using these blocks and thought they would be perfect for our project! Can’t wait to use them!

michael r.

Worked perfect. I’ve received two 24 packs that I didn’t order. I’ve left a message twice but didn’t receive a call. Do I keep them? I don’t want to be billed for them since I didn’t order them. 614 266 1840. Mike Rankin.

Alphonso H.

excellent product easy to use build a shed platform 10x12 with 4x4 post. the only thing is the price

Mark P.

These are going to work great I haven't started my project yet but they perfect for what I need to get going.

William R.

Work great!

Jim B.

Made it easy to build a strong deck for my shed. So glad I discovered these.

Lori T.

Everything looks great and delivered at a reasonable amount of time.

Kevin R.

Good

Victor R.

Because our 10' x 5' shed is on a property easement, our county required it to be easily moved if utility access is needed (it will never happen). TuffBlocks was an excellent solution for this. They are great to work with, easily leveled, strong (overkill in this project), and durable. This is my second project with TuffBlocks. Several years ago I built a low deck that has remained firm, stable, and level.

Samuel A.

Work great

Mark P.

The build went as expected. It looks great and is very solid. The Tuff Blocks worked as described. This is a great way to build a floating deck.

Donald M.

First time using TUFFBLOCK. The product outperformed all of my expectations. The framework for a replacement deck, set up quickly, securely, and provided a SOLID base. TUFFBLOCK wins hands down in any cost benefit analysis.

Lance C.

Fantastic product.

Dan B.

Will definitely use this product again

Eric

Worked as designed

Michael H.

Probably added more blocks than needed but plan on putting something heavy on top. Once you have the tuffblocks level it works out perfectly. It was nice not having to dig posts and I was limited in that capacity due to being on septic. Love it so far and decking will be completed soon for the 12 x 8 ft framing.

Tyler A.

TuffBlocks have been great to use!

Julie M.

Using TuffBlocks helped me tackle a deck project that I wouldn’t have even tried if I had to pour footings or use cement footings.

Alan S.

Works like all the videos and reviews said they would. No issues whatsoever. Confident they will hold up my little shed. I would buy again for sure.

Paula L.

worked perfectly! great product!

Steven S.

Worked like a charm. Saved a ton of time, shed does not contact the ground, should last forever.

Bill W.

This was my first time using tuffblocks, and I could not have been happier with the product and service. They worked exactly as expected and the end result was perfect!

Ali I.

Works great, simple, strong and easy to use. First time I built a platform for my shed. The finish product looks great

Alan M.

TuffBlock wasn’t that easy to level.

William L.

Easy to use, built floating deck with no issues. Will be purchasing again for more projects.

Nick H.

Built a small deck, they worked great!

Weston B.

Used 7 tuffblocks for the base of my families outdoor shower, saved a ton of time and labor vs pouring concrete piers. Couldn’t be happier.

Michael G.

Easy to use and performed as advertised. Very happy!

Rodney B.

Found it very difficult to get 44 piers all level.

Tom C.

Easy to use and worked great for a ground level deck above an existing concrete patio

Agustin C.

Great product, first deck I ever built easy to use. Deck rock solid

James H.

Great for low profile deck

Tyler A.

TuffBlocks have been a great product and much better than our previous product. I've had a great experience with them and with their team. I'm about to order a ton more!

Kenneth M.

I had no problem receiving the product, which I appreciate greatly. I have not started the project yet because of weather, but will share pictures as I move along. I did want to take this opportunity to ask you a question. The reason that I chose this product was because I have sprinkler lines in the ground where the new deck will be placed. In speaking with a trex expert, he cautioned me Against placing the tuff blocks on top of the irrigation lines. We do plan to put a hot tub on the deck, and he had said that the tuff block supports would eventually crush those lines. Do you have any suggestions with regard to how to prevent this from happening if I have to put a tuff block over those lines? I was considering placing a flat steel plate over them and under the tough block to distribute the weight, but i'm not sure if that's the right way to go? I would appreciate any suggestions that you could share. Thank you, Ken Mount

Kenan L.

These worked great for the deck. Way easier than those concrete blocks and I’m sure they’re just as strong. I built a low profile deck, so these being close to the ground worked perfectly

Becky M.

Wonderful product to work with…very easy to use

Jennifer R.

This was an absolutely perfect product for our ground level deck project. Easy to use, light to move around and get in position, and very adaptable. We had a slight slope away from the house, and adding short 4x4 supports was easy too. I will definitely recommend to others.

Joseph E.

Highly recommend.

Trisha

Way better than thr alternative hands down

Eric E.

Delivered in a timely manner in sturdy packaging.

David P.

LOVE the product and has made my project a dream to put together. Just offer a wider variety of shipping quantities. 8 and 24 just does not offer a good experience. I knew what I needed based on your extensive video and other related material, so why not let me order that number versus having to over purchase?

Justin L.

Great support for a 16 by 16 deck!

Simon C.

TuffBlocks made building the foundation of our greenhouse so much simpler than any other method would have been, especially on a slope next to the house, where no digging was possible. The TuffBlocks were installed on reinforced concrete pads, and a laser level was used to measure the 4x4 risers below the 4x4 base frame. The end result is excellent - very sturdy, and a great addition to our home.

Deena R.

Work great!

Nicholas L.

Very easy to install and my frame is super strong.

Kristine C.

Easy to use, garden shed base went up in a day.

Randy J.

For building a simple storage building…this saved a lot of cost and time.

Edward L.

Have not started my project yet due to cold weather.

Julie M.

I won’t be using them until next spring but I think they’ll work well for our floating deck.

Debra F.

Loved working with Tuff Blocks. I used them as a foundation for a woodshed. They were very easy to work with and I will definitely recommend the product to others. Thanks for making a great product!

Allan T L.

GREAT PRODUCT…very versatile

Marcelo C.

Nice

T. S.

Love these! Stong, light, reasonably priced, easy to use, no concrete to remove if my deck is removed in the future, no digging. They gave me an extremely solid foundation for my deck. Highly recommended!

Tyler A.

These work great and add a lot of flexibility to the foundations of the sheds I build for my business! They work a lot better than the concrete blocks I used to use.

John G.

ill be buying more

James B.

20x20 ground level deck project. TuffBlocks were perfect for supporting on an existing concrete slab. Made our work easier and saved a ton of time. Great product!

Daniel J.

Product worked great and provided a stable base for our deck.

Jeff S.

The best idea in deck building for low profiles.

Bill W.

I really liked the TuffBlocks. We wanted a simple deck close to the ground. I needed to take my time to level the ground, but after that l, it went very smoothly. I would recommend 100%.

Ali G.

Great foundation for my custom lean-to shed.

Londa M.

Using the floating TuffBlock foundation system not only kept our mature tree root system from sustaining damage but also provided the truly low-profile look we were going for. Traditional dug footings would have been impossible to dig around all the tree roots and likely would have killed the tree. TuffBlock were amazingly easy to use; lightweight and strong.

J H.

Web site sucks. Cant get things play scrolls on own just sucks

Charles H.

Box lids were open and help together with packing tape. Not acceptable.

Brian H.

Great service, great product, will need more

Sye S.

So far, so good! I built a floating deck on top of a decomposite granite patio using TuffBlocks and it was easy to level them. So far they've been easy to work with and seem very sturdy.

Ray F.

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!

Brett F.

Worked fine, simple and accurate.

Jae B.

Great blocks! Decided to use Tuff Blocks instead of Camo blocks since Tuff has smaller footprint. Haven’t installed them yet since I am still waiting for HOA approval on my <200sq deck…

Mark G.

Used for a free standing 10x10 deck to house my gazebo. Worked out great.

Trevor B.

They were so easy to use and my new floating deck feels so solid! I’d definitely use them again.

Michael M.

So much easier than the concrete blocks. Put my 2x6 joists directly on the Tuffblocks. Leveled with some crushed gravel.

Michael W.

TuffBlock made my project so much easier and quicker to build the base for my shed and surrounding deck.

Michael D.

These Tuffblocks are awesome! Lightweight but strong. In designing low level platforms for landscaping I discovered many uses for these. One can think outside the box in using Tuff Blocks!

Amanda S.

We have never built a deck before and after doing research on YouTube and finding Tough Blocks, we decided we could do this. These have truly made it so much easier. No need for concrete footings. We’ve been using the paver base to level underneath them and so far, we are half framed and everything is level and stable. These are awesome! What a great product. We highly recommend them especially for the DIY home owner. They make it easy and there are plenty of tutorials.

Robert D R.

I ordered TuffBlock because of the weight. They use recycled plastic. And most importantly they’re made in the USA. When I received my order I was pleasantly surprised with the design and quality of the product. Haven’t started this project yet but soon. Building a low deck around a recently purchased hot tub. Will send pictures when it’s finished.

Janet

Very satisfied

Janet D.

These were so easy to use. Hardest part was getting the ground level.

Ernie L.

Project is to extend our front porch with A ground deck at the same level likely not until summer 2025

John M.

Eastiest deck build ever with Tuffblock. No digging, no concrete or heavy blocks. Highly recommend.

Ronald S.

Amazing product!!

Thomas L.

Good product.

John M.

Easiest deck I ever built. No digging, no concrete or heavy deck blocks.

Alexsander D.

Amazing product. It just works.

Mark R.

Great way to quickly level a floor for a shed. Will always return back to tuffblock for ease of use!

Availlable Online & In-Store at

Availlable Online &
In-Store

Built to Handle Real-World Conditions

Frost heave?

TuffBlocks sit on a compacted gravel base, allowing natural ground movement without cracking like concrete footings.

✔ Used successfully in freeze-thaw climates across North America

Sinking?

The wide base spreads load evenly. Installed on compacted gravel, TuffBlocks create a stable, long-term foundation.

✔ Supports up to 1,700 lbs per block

High Wind?

In high-wind areas, builders often secure structures with earth anchors or combine TuffBlocks with in-ground footings for additional stability.

✔ Used successfully in storm-prone regions across North America

Code Compliance?

TuffBlocks are ICC-ES certified and used in thousands of residential builds across the U.S.

✔ Always check local building guidelines before starting your project

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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.”

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!"

What DIY & Builders say

What DIY &
Builders say

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Ready to Build?

Calculate how many blocks you need

One Foundation. Multiple Build Options.

Ultra-low profile decks

Raised decks

Variable height decks

Intermediate footing decks

Perfect for: Floating decks, low-profile builds, sheds, playhouses, platforms, walkways & more.

TuffBlock works on almost any surface including soil, gravel, turf, or pavers.

Why Builders Replace Concrete with TuffBlock

For decades, concrete deck blocks have been the default. But they were built for permanent footings - not modern floating decks. They’re heavy, awkward, and time-consuming to work with.

TuffBlock vs concrete decking block Foundation system.png__PID:5be48b18-5f75-43ef-bc12-8e2cdda2b2e5

CONCRETE BLOCK

✘ Heavy & labour intensive
✘ Can crack or degrade
✘ No warranty
✘ Minimum deck height of 12"–18"
✘ Absorbs water
✘ Often requires cutting & grinding for lumber fit

TUFFBLOCK

✔ Easy to carry & fast to install
✔ UV-stable, corrosion-proof
✔ 25 year warranty
✔ Low deck height of only 6"
✔ Does not absorb water
✔ Fits real world lumber variation for posts, joists & bearers

Real-World Foundation Comparison

Based on a 12' × 12' floating deck using ~18 blocks

Concrete Blocks

Up to 40 lbs per block
Up to 720 lbs handled

~8–10 minutes per block
~2.5–3 hours foundation setup

Heavy lifting
Repeated repositioning
Higher physical strain

TuffBlock DECK BLOCKS

1.5 lbs per block
~27 lbs total handled

~2–4 minutes per block
~45–70 minutes foundation setup

Lightweight
Fast adjustments
Minimal strain

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Ready to build your next deck project?

Shop Now Calculate Number of TuffBlocks

Free Shipping. Available online & at Lowe’s nationwide.

TuffBlock is Built for Modern
Low-Profile Decks

Today’s homes feature:

• Flush sliding doors
• Minimal step-down transitions
• Tight threshold clearances

Bulky concrete blocks were never designed for these constraints.

TuffBlock allows decks to sit approximately 6 inches above grade, making it ideal for low-profile applications.

Low level timber deck frame supported by TuffBlock deck blocks installed along a narrow garden pathway without concrete footings

Ground level floating deck build using TuffBlock supports installed above prepared surface for fast installation

Floating deck frame supported by TuffBlock foundation blocks installed above ground beside a pool during deck construction

As seen on leading TV networks and building influencers.

Not all composite deck blocks are
built the same

As polymer deck blocks gain popularity, more low-cost plastic options have entered the market. It’s important to understand:

Plastic alone does not determine strength.

Engineering does.

TuffBlock

✔ Load rated and tested
✔ Proven with 150K+ real bulds & zero warranty claims
✔ Break tested under high stress
✔ Manufactured using structural-grade polymer
✔ UV-stabilized for outdoor durability
✔ Designed with weight distribution geometry
✔ 25 year warranty
✔ Made in the USA

Unverified Imitators

✘ Unverified overseas imports
✘ Do not publish verified load ratings
✘ Do not provide break testing data
✘ No certification
✘ Use unknown material composition
✘ Offer limited traceability or warranty

How to Install Deck Blocks
in 3 Simple Steps

How to Install Deck Blocks in 3 Simple Steps

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

Preparing compacted ground for floating deck foundation using TuffBlock deck blocks before frame installation

Prepare Ground

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

Laying out timber deck frame positioned on TuffBlock deck foundation blocks for floating deck construction

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.

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.

TuffBlock Calculator

How Many TuffBlocks Do You Need?

Enter your deck length and width in feet to estimate required TuffBlocks and recommended pack quantities.

✔ Based on 16" on-center spacing
✔ Designed for ground-level floating decks
✔ 150,000+ real builds
✔ No email required

Deck Length (ft) Deck Width (ft)

Or use our deck block spacing chart below to estimate how many TuffBlocks you need based on common deck sizes.

Deck Length (feet)	Deck Width (feet)	Deck Area Calculator (sq feet)	Estimated TuffBlocks
8	12	96	24
20	10	200	42
20	12	240	42
30	10	300	60
20	16	320	56
35	10	350	72

Shop TuffBlock Now

Free Shipping USA Wide

Available online & at Lowe’s nationwide

Specification	Instant Foundation System
Dimensions	Width 3.5", Height 2", Length 12"
Weight	1.5lbs
Material	High strength closed loop recycled polyolefin material with an ultra-high UV rating
Load Rating	1,700 lbs & break tested to 11,000 lbs
Stirrup Width	Suits 1.4"-1.6" or 1.4"-2" joists and bearers as well as 3.5"-4" posts
Warranty	25-Year Warranty. Zero warranty claims to date.
Shipping	Free shipping across. No heavy lifting. No forklifts

Engineered smart. Built tougher.

Watch Real Builds with TuffBlocks

Click on any of the below to see real decks, sheds, stairs and more built using BuildTuff's TuffBlock foundation blocks.

TuffBlock Deck Block available at Lowe’s

ground-level-floating-deck-using-deck-blocks.jpg.jpg__PID:7a42f05a-f09e-47a6-8cbb-ca43990c1f5f

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Frequently Asked Questions

Shop TuffBlock Now

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.

Buy Now

What others say

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How to Build Easy With TuffBlocks

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.

Level

42.png__PID:31f765b7-0e70-41be-853c-62d650593c65

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

43.png__PID:7fc940cd-e695-462b-9ca1-747c2e1346e0

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.

Buy Now

America's Favorite & Most Trusted Deck Block

The Smarter Alternative to Heavy Concrete Deck Blocks

ICC Certified & Build Ready

150K+ Real Builds

Rated 4.9/5 stars by DIY & contractors

25 year warranty guarantee

Trusted for Decks, Sheds & Floating Foundations

Engineered to Meet Australian Building Standards

150K+ Real Builds

Rated 4.9/5 stars by Pros & DIY

25 year warranty guarantee

Trusted for Decks, Sheds & Floating Foundations

Start Your Build Today

TuffBlock Packs

Built to Handle Real-World Conditions

Frost heave?

Sinking?

High Wind?

Code Compliance?

Jerry & Sierra (Site Built Sheds)

Russell (Shedscape)

Justin (DIY)

What DIY & Builders say

What DIY & Builders say

One Foundation. Multiple Build Options.

Ultra-low profile decks

Raised decks

Variable height decks

Intermediate footing decks

Why Builders Replace Concrete with TuffBlock

CONCRETE BLOCK

TUFFBLOCK

Real-World Foundation Comparison

Concrete Blocks

TuffBlock DECK BLOCKS

TuffBlock is Built for Modern Low-Profile Decks

Not all composite deck blocks are built the same

TuffBlock

Unverified Imitators

How to Install Deck Blocks in 3 Simple Steps

How to Install Deck Blocks in 3 Simple Steps

Prepare Ground

Layout Frame

Install Deck Boards

TuffBlock Calculator

How Many TuffBlocks Do You Need?

TuffBlock Deck Block Explained in 90 Seconds

Watch Real Builds with TuffBlocks

Frequently Asked Questions

Contractor & DIY Review

Built for the Jobsite

What others say

How to Build Easy With TuffBlocks

Drop

Level

Build

✔️ No curing time. No mess. Build immediately.

Built To last

What DIY &
Builders say

TuffBlock is Built for Modern
Low-Profile Decks

Not all composite deck blocks are
built the same

How to Install Deck Blocks
in 3 Simple Steps