How to Build a Floating Deck with Concrete Blocks

Linda Jul 20, 2026
How to Build a Floating Deck in Your Backyard: A Step-by-Step Guide
How to Build a Floating Deck in Your Backyard: A Step-by-Step Guide

Building a floating deck with concrete blocks is a great way to create a unique outdoor space that adds value to your home. Unlike traditional decks, floating decks are not attached to the house, giving them a more modern and sleek appearance. If you're looking to create a floating deck, you'll need to consider a few key factors, including the type of concrete blocks to use, the design and layout of the deck, and the necessary safety precautions.

How to Build a Floating Deck in Your Backyard: A Step-by-Step Guide
How to Build a Floating Deck in Your Backyard: A Step-by-Step Guide

When it comes to choosing the right concrete blocks for your floating deck, you have a few options to consider. You can use either precast concrete blocks or cast-in-place concrete blocks. Precast blocks are made in a factory and are typically more expensive than cast-in-place blocks. However, they can be installed more quickly and may be a better option if you're working on a tight deadline.

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Design and Layout

The design and layout of your floating deck will depend on the size and shape of your yard, as well as your personal preferences. You'll need to consider the size and shape of the deck, as well as the location of any support columns or beams. You may also want to include features such as railings, stairs, and seating areas.

How to Build a Floating Deck Using TuffBlock Foundation Blocks
How to Build a Floating Deck Using TuffBlock Foundation Blocks

Deck Size and Shape

The size and shape of your deck will depend on the size and shape of your yard. You'll want to make sure that your deck is proportional to your yard, and that it doesn't overwhelm the space. A good rule of thumb is to keep your deck to a maximum size of 12 feet by 12 feet.

DIY Hacks for Building a Floating Backyard Deck with TuffBlocks
DIY Hacks for Building a Floating Backyard Deck with TuffBlocks

When it comes to the shape of your deck, you have a few options to consider. You can choose a rectangular shape, a square shape, or even a circular shape. The shape of your deck will depend on the style and design of your yard, as well as your personal preferences.

Support Columns and Beams

Support columns and beams are an essential part of any floating deck. They provide the necessary structural support to hold the deck in place. When choosing support columns and beams, you'll want to make sure that they are made of durable materials that can withstand the weight of the deck and any additional features you may add.

Building an
Building an

There are a few different types of support columns and beams that you can use for your floating deck. You can choose from precast concrete columns, steel beams, or even wooden beams. Each of these options has its own advantages and disadvantages, so you'll want to make sure that you choose the right one for your project.

Materials and Tools

When building a floating deck with concrete blocks, you'll need to have a few essential materials and tools on hand. These may include concrete blocks, a concrete mixer, a shovel, and a level. You may also want to consider investing in a few specialized tools, such as a concrete saw or a concrete grinder.

How to build a floating deck
How to build a floating deck

Concrete Blocks

Concrete blocks are the foundation of any floating deck. They provide the necessary structural support to hold the deck in place. When choosing concrete blocks, you'll want to make sure that they are made of durable materials that can withstand the weight of the deck and any additional features you may add.

How to Build a Floating Deck (Step by Step Guide) - Decks by E3
How to Build a Floating Deck (Step by Step Guide) - Decks by E3
Building a floating deck in my backyard | No concrete needed
Building a floating deck in my backyard | No concrete needed
Floating Backyard Deck Idea: Enhance Your Backyard with this Deck Off Back of House Design
Floating Backyard Deck Idea: Enhance Your Backyard with this Deck Off Back of House Design
Building a floating deck over an uneven concrete slab
Building a floating deck over an uneven concrete slab
how to build a fabulous floating deck
how to build a fabulous floating deck
DIY Floating Deck (25 Free Plans)
DIY Floating Deck (25 Free Plans)
DIY Floating Deck, Part 2: Frame & Waterproofing
DIY Floating Deck, Part 2: Frame & Waterproofing

There are a few different types of concrete blocks that you can use for your floating deck. You can choose from precast concrete blocks, cast-in-place concrete blocks, or even concrete blocks with a decorative finish. Each of these options has its own advantages and disadvantages, so you'll want to make sure that you choose the right one for your project.

Concrete Mixer

A concrete mixer is an essential tool for any floating deck project. It allows you to mix and prepare the concrete for the deck, ensuring that it is the right consistency and strength. When choosing a concrete mixer, you'll want to make sure that it is durable and reliable, and that it can handle the demands of your project.

There are a few different types of concrete mixers that you can use for your floating deck. You can choose from electric mixers, gas-powered mixers, or even manual mixers. Each of these options has its own advantages and disadvantages, so you'll want to make sure that you choose the right one for your project.

Building a floating deck with concrete blocks can be a fun and rewarding project. By following these tips and considering your options carefully, you can create a beautiful and functional outdoor space that adds value to your home.

Before you start building, make sure to check with your local building codes and regulations to ensure that your project meets all the necessary requirements. It's also a good idea to consult with a professional contractor or builder if you're unsure about any aspect of the project.

With the right planning, materials, and tools, you can create a stunning floating deck that you'll enjoy for years to come. So why not get started today and create the perfect outdoor space for your home?