---
product_id: 545026586
title: "Instant Foundation Block Deck Support System for 4\" x 4\" Posts and 2\" Joists"
brand: "tuffblock"
price: "฿11835"
currency: THB
in_stock: true
url: https://www.desertcart.co.th/products/545026586-instant-foundation-block-deck-support-system-for-4-x-4
store_origin: TH
region: Thailand
---

# Made from recycled polyolefin Only 1.5 lbs, ultra-lightweight Supports 1700+ lbs load Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists

**Brand:** tuffblock
**Price:** ฿11835
**Availability:** ✅ In Stock

## Summary

> 🏗️ Build Bold, Build Light, Build Fast!

## Quick Answers

- **What is this?** Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists by tuffblock
- **How much does it cost?** ฿11835 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/545026586-instant-foundation-block-deck-support-system-for-4-x-4)

## Best For

- tuffblock enthusiasts

## Why This Product

- Trusted tuffblock brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile Fit:** Designed to perfectly accept all 2” nominal joists and 4x4 posts—build your dream deck your way
- • **Eco-Chic Build:** Crafted from recycled materials with ultra-high UV resistance—sustainability meets durability
- • **Effortless Strength:** Supports over 1700 lbs—deck with confidence, no concrete needed
- • **No-Dig Installation:** Build decks just 5.5 inches off the ground—skip the backbreaking digging and save time
- • **Featherweight Foundation:** Weighs just 1.5 lbs—28x lighter than traditional blocks for easy handling

## Overview

The TuffBlock Instant Foundation System revolutionizes deck building by replacing heavy concrete blocks with ultra-lightweight, recycled polyolefin blocks that support over 1700 lbs. Designed for 2” joists and 4x4 posts, it offers a no-dig, ventilated, and termite-resistant foundation solution that’s perfect for floating decks, sheds, and more.

## Description

The TuffBlock Instant Foundation System is a lightweight deck foundation alternative to concrete. It consists of multiple floating deck blocks that sit on top of the ground and accept pieces of wood to construct decks, garden sheds, landings, pathways, raised walkways, cubby houses, dog shelters and more. The TuffBlock’s are made from recycled polyolefin material with an ultra high UV rating. They are designed with a ventilated underside to prevent moisture buildup and termites. The TuffBlock system is the only block product that can be secured to the post or bearer to provide extra stability. Each TuffBlock can support up to 1,700 pounds and weighs only 1.5 pounds. They are designed to accept 2” x 4”, 2” x 6”, 2” x 8” Joists and 4” x 4” Posts. The TuffBlock system is unique because it allows you to build a deck that is 5.5 inches low without the need for digging.

## Features

- Instant foundation system used for building floating decks and platforms
- Replaces heavy concrete blocks
- Each block designed to support over 1700 lbs
- Weights 1.5 lbs -- 28 times lighter than concrete
- Extremely adaptable to accept all 2" nominal joists and 4 x 4 posts

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item Form | Rectangular |
| Specification Met | Yes |
| Number of Items | 1 |
| Manufacturer | TuffBlock |
| Item model number | TB001602 |
| Product Dimensions | 30.48 x 30.48 x 8.89 cm; 630 g |
| ASIN | B07YN6HMHM |

## Product Details

- **Material:** 100% Recycled High Strength Closed Loop Polyolefin
- **Brand:** TuffBlock
- **Item dimensions L x W x H:** 30.5 x 30.5 x 8.9 Centimeters
- **Colour:** Black
- **Shape:** Rectangular

## Images

![Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists - Image 1](https://m.media-amazon.com/images/I/51eQWg9sn+L.jpg)
![Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists - Image 2](https://m.media-amazon.com/images/I/61fLlMI9B2L.jpg)
![Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists - Image 3](https://m.media-amazon.com/images/I/61OWteYswUL.jpg)
![Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists - Image 4](https://m.media-amazon.com/images/I/61vW1ywLwML.jpg)
![Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists - Image 5](https://m.media-amazon.com/images/I/61RbzBuH1CL.jpg)

## Questions & Answers

**Q: How many are in each order?**
A: $32 for 1?! Go to Lowe’s. They are like $9.80 for 1!

**Q: How many would I need for a 10x20 shed floor?**
A: The number you need is determined by size of the beam, most small sheds are probably 2 x 6 joists and spacing should not exceed 5'.
Are you using 4x4 posts?

**Q: 3rd image shows a 2x6 being held along the side. How high off the ground is the 2x6 from the ground?**
A: It’s about 2-3”

**Q: Can one be used for mailbox support?**
A: Don’t see why not. Put a 4x4 post in the middle and should be good to go! Make sure surface is level under the block.

## Frequently Bought Together

- TuffBlock Instant Foundation Block Deck Support System for 4" x 4" Posts and 2" Joists
- BuildTuff TuffBlock Deck Support - 8 Count
- Pro-Grade Composite Shims for Heavy Duty Leveling. 24 pk 7.75 Inch, Never Rot, Easy Snap, Level Wedges. Water, Weather Resistant for Toilets, Doors, Windows, Sheds. Support Appliances and Furniture

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.co.th/products/545026586-instant-foundation-block-deck-support-system-for-4-x-4](https://www.desertcart.co.th/products/545026586-instant-foundation-block-deck-support-system-for-4-x-4)

---

*Product available on Desertcart Thailand*
*Store origin: TH*
*Last updated: 2026-03-11*