composite decking on concrete

The short answer is: yes! You can install composite decking over concrete. In fact, it's the ideal place to lay a composite deck. Why? Let's find out...

Why It's Good to Put Composite Decking on Concrete


1. Installation will be much quicker 

A concrete floor provides a stable and supportive base for your composite decking. This will make the whole process smoother and more efficient as there's no need to lay a solid base beforehand.


2. You can easily get rid of old concrete 

Many people choose to replace old and dingy concrete patios with fresh and durable composite decking. This is a popular option, as it makes it very easy to renovate your outdoor space. Out with the old, and in with the new!


3. You won't have to deal with pesky weeds

When you put composite decking on concrete, the concrete will act as a barrier between the ground and your decking. This ensures that no weeds will be able to weave their way through to your brand-new deck!


4. Concrete is the perfect base for composite decking

The material composition of concrete allows for the optimal composite decking base. Especially in comparison to other materials such as gravel or sand.

Here are some features of concrete that make it the ideal base for composite decking:

  • It's sturdy
  • It's moisture-free
  • It's stable
  • It's durable



Things to Note When Installing Composite Decking Over Concrete 


Ensure that the concrete is settled

If you have only recently laid concrete down for your property, you must be certain that it is set before installing composite decking over it. 

Concrete can take several years to settle, so if you add composite decking above concrete before then, you may find that your luscious deck will sink faster than the Titanic.

To check if your concrete patio is sinking or has sunk, take periodic measurements of the house foundation and the patio. If you see an increasing difference over time, get that concrete settled before you do anything with your composite deck!


Make sure that the composite decking doesn't block any doors

You'd be surprised at how many people install composite decking only to find that their outdoor doors no longer open properly! 

When you put composite decking over concrete, the surface will raise by 2-3 inches, so make sure you check any affected doors,

You can do this by building a simple wooden template of 3x5ft to see whether it affects your doors from working efficiently.


Do you need help with your deck installation over concrete?

To help our customers with installation, we provide a free guide on how to install and maintain all of our composite decking products.

Composite Decking Installation & Maintenance Guide


We strive to provide the very best service to all of our customers, which is why we have a Customer Service team on hand to answer any installation questions you may have.

Contact Us