Can they be used for fence post?

No, they are really not appropriate as a fence post base. They aren't designed to supply much lateral support. They're meant to support a deck post.

My local building inspection office requires an icc, intertech, or similar evaluation product evaluation for new products does this have one?

Yes, their website shows the product has been evaluated and been certified. Search Tuff Block certification and the search should take you to the web page with the information! Good Luck!

How many would i need for a 20'x20' woodworking shop/ shed with a loft?

One big package does 10x10 so I would get 2. I had maybe 5 blocks left over.

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

Help Track order

Account Cart

Instant Foundation Block for Decks (24-Pack)

Instant Foundation Block for Decks (24-Pack)

Product ID: 70667234

Details

Brand
Tuffblock
Capacity
1700 pounds
Color
Black
Material
High strength
Product Dimensions
11.81"L x

♻️Made from recycled polyolefin

⚖️1.5 lbs, 28x lighter than concrete

🏋️‍♂️Supports 1700+ lbs load

€ 1381.00

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Description

🏗️ Build Bold, Build Light, Build Smart!

ECO CHIC DURABILITY - Crafted from recycled polyolefin with ultra-high UV resistance for long-lasting, sustainable strength.
BUILT TO LAST WITH STABILITY - Unique ventilated design prevents moisture and termites, plus secure fastening for rock-solid support.
NO DIG NO STRESS INSTALLATION - Build decks as low as 6.5" off the ground with zero concrete and zero hassle.
ULTRA STRONG YET FEATHER LIGHT - Supports massive 1700 lbs while weighing just 1.5 lbs—deck building made effortless.
VERSATILE FIT FOR EVERY PROJECT - Adapts seamlessly to 2" nominal joists and 4x4 posts—perfect for decks, sheds, and more.

The TuffBlock Instant Foundation System is a revolutionary lightweight alternative to concrete blocks, supporting over 1700 lbs while weighing only 1.5 lbs each. Designed for floating decks and platforms as low as 6.5 inches off the ground, these recycled polyolefin blocks offer ultra-high UV resistance, moisture and termite protection, and compatibility with standard joists and posts. With a 25-year warranty and easy no-dig installation, TuffBlock empowers professionals and DIYers alike to build durable, eco-friendly foundations faster and smarter.

Specifications

ASIN	B075G8C9C4
Best Sellers Rank	#705,328 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #458 in Decking
Brand Name	Tuffblock
Capacity	1700 pounds
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (125)
Hole Count	2
Item Dimensions L x W	11.81"L x 11.81"W
Item Weight	1.5 pounds
Manufacturer	Evolve Group
Manufacturer Part Number	14010011
Material Type	High strength closed loop recycled polyolefin material with an ultra-high UV rating
Number of Pieces	24
Unit Count	24 Count
Warranty Description	25 year warranty

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

How long does delivery take and is it reliable?+

Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Anita G.

Good experience, but the tracking updates could be better.

2 months ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

€ 1381.00

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Austria.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

View all Trustpilot reviews