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Composite decking has gradually evolved into a more popular choice for outdoor construction. Because of its better durability, low maintenance, and aesthetic appeal. If you have decided to install composite decking in your outdoor space. You may be wondering can composite decking be installed over concrete. In fact, the most common material used to support frames for decks and outdoor spaces is concrete. Many builders use concrete because it is economical and more durable. In the next article, we will discuss can composite decking be installed over concrete and how to install composite decking over concrete.
In most cases, you can attach composite decking boards over concrete. But it is important to remember that you must build a substructure that allows airflow and drainage. A concrete surface provides a dry, durable, and sturdy area that is friendly to your deck. And using concrete as a base has the following benefits:
Installing composite decking over concrete is a very simple project. However, in some cases, you cannot install over concrete. And there are some precautions you need to strictly follow during the installation process.
In most cases, you can install decking on concrete very easily. However, it takes several years for the concrete to be fully set. Installing composite decking boards during this time may cause the deck to sink along with the concrete.
To avoid this, you can take precise measurements to see if your concrete deck will sink. Draw a horizontal line near the surface of the concrete foundation and record the vertical distance from the mark to the concrete. Measure every month and compare if there is movement or sinking.
Installing composite decking over concrete will raise the surface of your deck by 2-3 inches. If there is a door near the deck, make sure that the deck will not block the door frame after installation. To avoid this, build a temporary deck to test and see if the new deck will have an impact.
If your door frame will be blocked by the composite decking, it does not mean you cannot install the new deck over the concrete. Although this can be very tricky to install, you can still seek the help of professional composite deck installers. They can design a more reliable solution to your needs.
If your concrete deck is broken and cracked, repair your deck before installing composite deck boards. Make sure the concrete is flat, structurally sound, and free of any damage or cracks during the installation process.
Repairing broken concrete is accessible by purchasing a self-leveling concrete repair product. Placing it on the uneven or broken deck allows it to dry and set. This will complete the concrete patio repair project.
Before installing composite decking, make sure you have the right clothing and equipment to protect yourself, including:
If your precautions and preparations have been completed. You are ready to begin installing your new composite deck, here are the steps that must be followed:
Thoroughly clean the surface of the concrete deck to remove any dirt, debris, or other contaminants that may interfere with the composite decking installation. Use a pressure washer and cleaner to ensure the surface is clean and free of any residue.
To ensure better adhesion between concrete and decking, apply a bonding agent to the surface. This is a special bonding agent for composite decking. Apply the bonding agent in a thin, even layer and follow the instructions for application and use.
When installing composite deck boards on a concrete deck, a sleeper system must be installed. The sleeper system is a grid of support beams, which allows a gap to be created between your deck and the concrete surface. The gap ensures air circulation and moisture drainage at the bottom of the deck. Preventing the collection of moisture that can cause deck rot. It also ensures gaps between composite deck boards, allowing your deck to circulate air better.
After the sleeper system is installed it is time to lay composite decking. Start the installation from one end of the sleepers and lay the deck perpendicular to the sleepers. Use hidden fasteners or screws to secure the deck in the sleeper system. Be sure to leave gaps in the installation of the decking to allow for thermal expansion and contraction of the deck.
After the deck is installed, you can add some decorations such as railings, stairs, and other accessories. To complete the look as well as the function of your outdoor space.
In conclusion, attaching composite decking directly to concrete is possible if it is thoroughly prepared and installed correctly. Installing decking over concrete is very easy and has many more benefits. It will make your composite decking more durable and save you more money on installation costs.