About

DescriptionDimensionsSpecificationsResourcesDeck chart

INSTANT FOUNDATION SYSTEM

TuffBlocks are a multi-purpose foundation system used for a range of home improvement projects including low profile decks, garden sheds, landings, pathways, cubby houses, dog shelters and more. 

TuffBlocks are an extremely popular alternative to digging holes and mixing concrete, which saves both DIY enthusiasts and professional builders time and money.

Not only are you building more effectively and efficiently, you’re building smarter with 100% recycled plastics.

Product Dimensions	Size & Weight
Width	11.81”
Height	3.54”
Length	11.81”
Weight	1.5lbs

Specification	Instant Foundation System
Model Name	TuffBlock Instant Foundation System
Model Number	14010001
Dimensions	Width 11.81", Height 3.54”, Length 11.81”
Weight	1.5lbs
Material	High strength closed loop recycled polyolefin material with an ultra-high UV rating
Material Color	Black
Load Rating	1,700 lbs
Stirrup Width	Suits 1½ - 2-inch joists and bearers, 3½ x 3½ inch or 4 x 4-inch square posts

Installation Guide

Tuffblock Install Guide

Video Install Guide

What are the most commonly asked TuffBlock questions?

Questions that are answered in this TuffBlock FAQ video:

0:00 What is a floating foundation system?

0:31 How much weight can each TuffBlock support?

0:43​ Are TuffBlocks UV resistant?

0:58 Can I use TuffBlocks on sloping ground?

1:14​ Do I need council approval?

1:34​ How do posts/joists sit in the TuffBlock and do they require fixing?

1:56​ Can TuffBlocks be used on wet surfaces?

2:22 Can I use TuffBlocks on sand?

2:35 Will TuffBlocks sink into the ground?

3:08 Can I use TuffBlocks in high wind areas?

3:27 How many TuffBlocks will I need for my project?

3:57​ What if I have ground movement in my area?

Please note. This FAQ video relates to both the TuffBlock and Evo-Crete Handi Block products. BuildTuff offers this information as a general guide only. You should rely only on relevant building codes and standard industry established construction methods in any construction project.  For our Master FAQ, please click here.

Deck Area Calculator & TuffBlock Estimator

Please use our custom TuffBlock Calculator to estimate your TuffBlocks:

Tuffblock Calculator

Deck Length (feet)	Deck Width (feet)	Deck Area Calculator (square feet)
8	12	96
20	10	200
20	12	240
30	10	300
20	16	320
35	10	350

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.

DISCOVER SMARTER WITH

• What are TuffBlocks made from? TuffBlocks are made from high strength recycled plastic. The lightweight material means they’re easily stacked and transported to job sites, unlike traditional concrete deck block methods.
• What's TuffBlock's warranty? TuffBlocks will not chip, crack, corrode or grow mold. We're so confident in our TuffBlocks, we offer a 25 year warranty 
• How does TuffBlock save me time? TuffBlocks are perfect for all skill levels and can be used in conjunction with traditional methods to save time and cost. It removes the need for the digging of holes, the pouring of concrete and shifting any subterranean obstacles, like tree roots or pipes. 
• Who uses TuffBlocks?  TuffBlock empowers professional builders and DIY renovators alike to tackle any project. Build your own outdoor creation, minus the hard labor and long hours. When your reputation and time matter, discover the smarter way to build using TuffBlock.