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Home > Blog > How to install composite decking over concrete?
deck installation | concrete porch | deck over concrete
18Jan
  • By EVODEK
  • Tue, Jan 18, 2022
  • 2209 Views

How to install composite decking over concrete?

Composite decking is more and more loved by families. But the design structure of each family is different. Today, let’s learn from EVODEK’s engineering experts how to install composite decking on concrete?

Table of Contents

  • Can you install the composite deck on the concrete patio?
  • Is this project suitable for your family?
  • Beware of the sunken terrace
  • Time and cost
  • List of tools and materials required
    • Horizontal and layout
    • Place and install keel frame
    • Installation of the composite decking materials on a concrete slab

Can you install the composite deck on the concrete patio?

Yes. In most cases, you can lay composite decking on concrete. It is important to note that, you must build a substructure that allows ventilation and drainage.

In fact, the surface of the concrete patio can provide a dry, durable and stable area, which is ideal for composite decks. There are many colors and patterns to choose from. And covering the concrete area with composite materials is a fast and simple method. Especially on the concrete terrace when setting the EVODEK deck boards.

However, whether composite decking can lay on the concrete, we also need to carefully consider other factors.

Is this project suitable for your family?

Installing composite decking boards on concrete terraces is usually a simple project. However, in some cases, it may take several years for the concrete to complete the settlement.

Beware of the sunken terrace

If your concrete is still sinking, it may not be a good idea to install a composite deck on the concrete terrace. When the concrete foundation begins to sink, it may take more than 5 years to stop.

If you decide to build a new platform on the terrace during that time. The new platform will continue to sink with the concrete foundation.

Time and cost

Installing a composite wood deck on a concrete slab is very simple. However, the time it may take to place the composite decking on the concrete front porch will depend on the size of the area.

A smaller project can be completed at the weekend, but a larger project may take more than five days. In addition to the size of the area, the time required mainly depends on the number of shims required for the sleeper to form a horizontal surface.

The average price for installing a composite deck board on concrete is approximately $30-50 per square foot. And depending on the composite selected, specific site factors, and design.

If you do this yourself, you will halve these figures. Labor and non-decorative materials usually account for two-thirds of the total cost of the project.

List of tools and materials required

Circular saw, hammer drill, cordless electric drill, chalk line reel, new floor, self-leveling composite, plastic gasket, flash tape, concrete screw.

Horizontal and layout

Before laying the frame keel, you need to repair the incomplete flat surface. Pour a thin layer of self-leveling compound on the uneven place to solve this problem.

Once the space is ready, you can start planning the layout. Most importantly, your layout should include the location of the keel frame and how each surface element is related to the other.

Alternatively, you can use the chalk line scroll to create a visual layout of your plan to help guide your installation. EVODEK has 22 years of experience in composite R & D and production. And has a professional engineering service team. If you are worried about the layout of your home, please feel free to contact us for free suggestions!

Place and install keel frame

The keel frame can be placed directly on the concrete. And the Joist can also be horizontal or inclined, as long as its surface forms a plane. Starting from the highest point of the terrace. Put your first keel frame in place and pre-drill the gasket, keel frame, and concrete with a hammer drill.

Fix with concrete screws and penetrate the concrete not less than 1 inch. Place additional keel frames in the same way, using straight edges to ensure that each keel frame is consistent with the last one.

If the waterproof layer has been laid on the concrete surface, screws can not be used. It is recommended to use cement to fix the keel on the concrete surface. Which can not only ensure the overall firmness but also avoid damaging the waterproof layer. Note that the length of screws used at this time should not be too long. In order to avoid penetrating the keel and damaging the waterproof layer.

Installation of the composite decking materials on a concrete slab

Placing decorative panels on keel frames is almost the same as building on ordinary decks. It is important to follow the manufacturer’s installation instructions.

EVODEK provides our engineers and homeowner customers with detailed installation services. Not only detailed installation manuals and installation videos. But also one-to-one installation suggestions to ensure that your project installation is smooth. If you do not understand, please feel free to contact EVODEK!



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