How to Build a Floating Deck in 7 Steps

A floating deck, also known as a ground-level deck or freestanding deck, is a wooden deck that is unattached to your home and elevated slightly above the ground. A straightforward DIY home improvement project, a floating deck can transform your outdoor space and create new landscaping opportunities. With the proper decking materials and a clear plan, you can construct your own floating deck.

Before beginning construction, make sure you have the correct materials and tools.

1. 1. Measuring tools: To maintain precision throughout the building process, use a variety of measuring tools. Some of the most useful options include chalk lines, speed squares, tape measures, and levels.
2. 2. Drill and deck screws: Stock up on galvanized fasteners like screws and nails to secure the framework and flooring of your deck. For a faster assembly process, use a drill.
3. 3. Shovel and rake: Use a shovel and rake to level the ground beneath your deck.
4. 4. Deck blocks: Concrete blocks and cement blocks are the most common materials used for decking foundations. Blocks are a quicker and simpler method than inserting deck footings into the ground.
5. 5. Wood: For decking boards and joists, use pressure-treated lumber. Although many hardware stores offer pre-cut wood, you can use a circular saw to make your own adjustments if necessary.
6. 6. Wood stain or paint: To protect the exterior of your floating deck from weathering, finish the wood with wood stain or paint.
7. 7. Safety gear: As with any DIY project, wear safety glasses, a helmet, gloves, and sturdy, closed-toed shoes while building a floating deck.

Learn how to build a floating deck by familiarizing yourself with these basic steps.

1. 1. Draw up your deck plans. Before you build, decide how you want your deck to look. Research different deck ideas and styles to inspire your plans. Write out a materials list for your specific deck needs. Although homeowners typically require no building permits for floating decks, you should still check your local building codes.
2. 2. Clear the deck area. Use a shovel or rake to rid the space of grass, rocks, leaves, or other plants. Remember to level the ground evenly.
3. 3. Arrange the deck blocks. Place concrete deck blocks on the ground, spacing them appropriately based on the size of your deck. These blocks are the only portion of the deck that will have ground contact. Lay a board across each block, and use a level to ensure that the blocks are level.
4. 4. Construct the deck frame. Cut your joists according to your deck plans. Fasten the end joists and rim joists together to create the outer frame. Using joist hangers, attach the floor joists to the outer frame.
5. 5. Set your frame. Lay the newly constructed frame and center it on the blocks. Use your measuring tools at each block to make sure your frame is still level.
6. 6. Place and secure the deck boards. Lay your decking boards across your floor joists. Begin with the first and last boards. Space your decking boards with an eighth of an inch between each board for drainage. Choose whether your decking boards will be flush with your frame or overhang slightly. Fasten the boards securely to the outer frame and inner joists.
7. 7. Stain your deck. Finally, apply wood stain or outdoor paint across your entire deck to protect it from weathering.

Consider these tips while building your DIY floating deck.

1. 1. Ensure proper ventilation. To prevent your deck from rotting or developing mold, build your foundation high enough for air to flow and dry the ground underneath it.
2. 2. Use landscape fabric. Prior to setting your deck blocks, roll out landscape fabric on the ground and top it with mulch or gravel. This method can help with proper drainage while preventing weeds from growing around and underneath your deck.
3. 3. Support the center of a larger deck. When building a large floating deck, include a few deck blocks in the center of your deck area for more support. Fasten additional inner floor joists to increase the stability of your floating deck.

Get the MasterClass Annual Membership for exclusive access to video lessons taught by the world’s best, including Kelly Wearstler, Ron Finley, Bobbi Brown, RuPaul, and more.