How To Build A Floating Deck Over Concrete Patio

How to Build a Floating Deck Over a Concrete Patio

A floating deck, also known as a freestanding deck, is a popular choice for homeowners who want to add a new deck to their property without disturbing the existing concrete patio. These decks are not directly attached to the house or the concrete, making them a versatile addition to any backyard. They offer a raised platform for relaxing, entertaining, and enjoying outdoor living. This article will guide you through the steps of building a floating deck over a concrete patio, covering essential considerations and techniques.

1. Planning and Preparation

Before you start building, careful planning is crucial. Here are key aspects to consider:

Deck Size and Design: Determine the desired dimensions and shape of your deck, ensuring it complements your existing patio and backyard space. Consider the purpose of the deck and how it will be used.
Materials: Choose durable and weather-resistant materials for the deck, such as pressure-treated lumber, composite decking, or cedar. These materials offer longevity, low maintenance, and aesthetic appeal.
Permits: Check with your local building department for any necessary permits or regulations regarding deck construction.
Site Preparation: Clear the area where the deck will be built, removing any debris, vegetation, and obstacles. Ensure the ground is relatively level, as this will impact the stability of your floating deck.

2. Setting the Foundation with Posts and Footings

A strong foundation is essential for a stable and safe deck. Here's how to create the foundation:

Determine Post Locations: Mark the post locations based on the deck size and design. Calculate the number of posts needed to support the deck's weight.
Dig Footings: Dig holes for the post footings at the marked locations. The depth and size of the footings depend on your local building codes and soil conditions.
Install Concrete Footings: Pour concrete into the holes, ensuring it's level and fills the entire footing area. Allow the concrete to fully cure before proceeding.
Mount Posts: After the concrete has cured, mount the pressure-treated posts on the footings using post anchors, base plates, or other suitable methods. Ensure the posts are plumb and level.

3. Assembling the Deck Frame

With the foundation set, you can start framing the deck. This process involves constructing the structural support for the decking boards:

Joist Placement: Measure and mark the joist locations along the posts. Joists are the horizontal beams that support the deck boards. Use appropriate joist spacing, typically 16 inches on center.
Joist Installation: Attach the joists to the posts using joist hangers or other appropriate fasteners. Ensure the joists are level and parallel.
Ledger Board: If you plan to have a handrail or railing along the edge of your deck, install a ledger board along the edge of the concrete patio. This board serves as a connection point for the railing.

4. Adding the Deck Boards

Once the frame is complete, you are ready to install the decking boards. This is the final stage of constructing the deck:

Board Selection: Choose the desired type of decking boards and ensure they are compatible with the frame construction. Secure the decking boards to the joists using appropriate fasteners.
Installation: Start installing the boards from one side of the deck, working your way across. Ensure the boards are spaced evenly and secured properly.
Finishing Touches: After installing the decking boards, you can add finishing touches like handrails, stairs, and landscaping elements.

Building a floating deck over a concrete patio is a significant project that can enhance your outdoor living space and add value to your home. By following the outlined steps and taking the necessary precautions, you can create a durable, aesthetically pleasing, and functional deck that will be enjoyed for years to come. Remember to always prioritize safety and adhere to local building codes during the construction process.