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.

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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 with UV protection

⚖️Only 1.5 lbs, 28x lighter than concrete

🏗️Supports 1700+ lbs load

€ 1386.51

Duties & taxes included

In stock

Sold byAmazon AustriaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🏡 Build smarter, not harder—deck foundations redefined!

UNMATCHED STRENGTH - Each block supports over 1700 lbs, ensuring rock-solid stability
LIGHTWEIGHT PORTABLE - At just 1.5 lbs, move and position blocks with ease—no heavy lifting
ECO FRIENDLY DURABILITY - Crafted from recycled materials with ultra-high UV resistance for long-lasting performance
VERSATILE COMPATIBILITY - Fits all 2-inch nominal joists and 4x4 posts for flexible design options
EFFORTLESS DECK BUILDING - No digging required—install decks as low as 6.5 inches off the ground

The TuffBlock Instant Foundation System offers a revolutionary lightweight alternative to traditional concrete blocks for floating decks and platforms. Each 1.5 lb block supports over 1700 lbs and adapts to various joist sizes, enabling quick, no-dig installation as low as 6.5 inches off the ground. Made from UV-resistant recycled polyolefin, these blocks prevent moisture and termite damage while providing secure, ventilated support backed by a 25-year warranty.

Specifications

ASIN	B075G8C9C4
Best Sellers Rank	#628,159 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #414 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

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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.

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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.

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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

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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€ 1386.51

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

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

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

2 weeks ago

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