If you’re planning to install a composite deck using decking pedestals then the number that you require will depend on many factors. The factors include the size of the deck, the types of joists and boards you’re using, and the manufacturer’s instructions.
Fortunately, working out how many you’ll need is fairly straightforward and shouldn’t take much time.
In this guide, we’ll take a look at what decking pedestals are, how to properly install them, and show you how to figure out how many you’ll need for your decking project.
What Are Decking Pedestals?
Decking pedestals, also known as risers, are adjustable, plastic supports that are placed underneath decking boards. The specific properties of decking pedestals vary depending on the manufacturer but below we have given some typical specifications.
- They’re generally frost-resistant to -40ËC and heat-resistant to 60ËC.
- They are usually made of polypropylene.
- They have a resistance to chemical cleaning products.
- They can be laid on most surfaces such as grass, bitumen and gravel.
- They can typically support 1000 kg in weight or more.
- They have an adjustable height which can go as high as 260 mm on some models.
Why Should I Use Decking Pedestals?
Access and drainage
In commercial buildings, if deck boards are laid over the top of certain utilities such as water pipes these will need to be accessible. Using decking pedestals means that the composite decking boards can easily be lifted when access is required.
A deck or terrace will also need to be provided with adequate drainage. As decking boards can be laid directly onto decking pedestals without any grouting being required water can easily find its way in between the boards or tiles.
Foot traffic
Your deck terrace is likely to experience heavy footfall during its lifespan and it’s very important that it’s able to withstand this. It may also need to be able to bear the weight of heavy furniture and ornaments.
Most decking pedestals are made using polypropylene which is a very strong material. This means that each pedestal will provide proper support to your decking area and reduce the risk of any boards collapsing.
During the installation of your decking, you should check the manual provided by the pedestal manufacturer to see what the load-bearing capability of the pedestals is.
Sub-frames
When installing your deck you may find that there is unstable or uneven groundwork. This would usually require you to create a sub-frame in order to support the decking. Constructing and laying this timber frame could cause delays in your decking project.
If you use a decking pedestal with joist supports or advanced spacer tabs you can avoid having to construct a sub-frame altogether. You can simply adjust the pedestals to the desired height and begin laying your decking boards on top of them.
Concrete foundations
As decking pedestals can be placed directly onto the ground you don’t need to lay concrete foundations before you start installing your deck terrace. You just need to lay out the pedestals, position the joists, and then attach the deck boards.
How To Install Decking Pedestals
1) Prepare the ground
Decking pedestals can be placed directly onto any type of surface such as concrete, tiles, or bare earth. Before you begin installation you’ll need to check that the surface is level by using a spirit level so that the risk of the surface shifting is low.
If you’re installing onto bare earth then a floating installation will probably be necessary. This is when the weight of the deck boards holds the structure down to the ground.
You can allow some minor irregularities in the surface but it should mostly be perfectly flat. Be sure that you check with a spirit level multiple times before you begin.
When installing directly onto bare earth you will need to either lay a fine concrete screed or a geotextile membrane to help prevent weed growth once the boards have been laid.
2) Pedestal spacing
You’ll next need to take measurements and decide what the overall height of your decking will be. If there are any doors that need to be factored in then you’ll need to decide if you want the decking to be flush with it or if you need to install steps.
You’ll then need to work out how many pedestals will be required for the job. Usually, the decking manufacturer will indicate how many are needed per metre squared.
Finally, you need to decide which direction your boards will go as this will determine how you will space out your pedestals.
3) Installing the pedestals
Now, start laying out the pedestals with the correct amount of spacing that you have decided on. If required, secure them with specified attachments or fixing plugs. Then, adjust them to the right height.
You should always leave a slight slope away from your property to encourage water drainage.
The spacing in between your risers will depend on the boards and joists that you use and you should always check the instructions from the manufacturer before you begin.
Generally, there shouldn’t be more than 70cm between consecutive decking joists.
4) Laying the joists
Next, you’ll need to start screwing the joists onto the pedestals so that the joists form a right angle with how your deck boards will be laid. Be careful that you don’t cause any damage to the adjustable mechanisms of the pedestals as you do this.
As a rule, you should aim to leave at least 10 cm between the boards and the ground to allow for proper ventilation.
5) Laying the deck boards
The next stage is to lay the decking boards over the joists and then attach them. You can do this by using screws or fasteners. Our composite decking boards come with hidden fasteners to preserve the visual appeal of the boards.
If you are using screws then make sure that you pre-drill the holes to reduce the risk of the boards cracking or splitting when the screws are attached.
6) Trimming
Once all of the boards have been laid and securely attached you can then start to trim them if necessary. It’s best to do this all in one go at the end rather than trimming them as you go.
To trim the ends of the boards you should use a circular saw.
7) Fixing miscalculations
If you’ve made any miscalculations with your measurements then you may need to remove certain boards and adjust their length or width. Again, you should use a circular saw to do this.
Once the boards have been adjusted you’ll need to lay them on top of the joists again. For any boards that have had their widths adjusted it’s best to lay them on the facade side of the deck to hide them from view.
FAQs
How much space should I leave in between composite deck boards?
Generally, you should leave between 3mm and 6mm of space in between each composite board. This is to allow enough room for the boards to contract and expand during temperature fluctuations.
If you don’t leave enough room then this could cause friction when the boards expand and could lead to unsafe gaps when they contract. Although composite doesn’t expand and contract as much as wood it will still do so during high and low temperatures.
Should I seal my composite deck?
There is no need to seal composite products as they are naturally resistant to water and rot. This means that moisture doesn’t penetrate into the core of the boards and rot is unable to form. If you choose to seal composite boards then it’s best to use lumber wax.
Is a composite deck eco-friendly?
Composite is considered to be the most eco-friendly decking option as it’s made with reclaimed wood and recycled plastics. Our range of composite boards is made with 95% recycled material and FSC-certified wood.
Browse Through Ecoscape’s Amazing Range Of Composite Deck Boards Today
Once you’re ready to start installing your composite deck take a look at our exciting range of composite boards. Our Clarity range boards come with a 20-year warranty and the boards in our Forma range come with a 25-year warranty.
There’s also a wide range of contemporary colours for you to choose from so that you can find something that’ll perfectly complement your home. All of our boards are scratch-resistant, water-resistant, UV-resistant and much more.
So, browse our range and order your free quote or sample today.
Comments (26)
This article is a great resource for anyone planning to install a composite deck using decking pedestals. The author provides clear and helpful information on the factors to consider when determining the number of pedestals needed for a project. I appreciate the details on the specifications and benefits of using decking pedestals. However, I do have a question on where to purchase these pedestals. Overall, this is a concise and informative guide for anyone looking to use decking pedestals for their new deck.
“Great article! I was considering using decking pedestals for my new composite deck, but wasn’t sure how many I would need. This guide provided helpful information on factors to consider and how to properly install them. I appreciate the specific specifications and benefits of using decking pedestals, such as their adjustable height and resistance to chemicals. However, I’m still unsure about where to purchase them. Any suggestions?”
As a seasoned expert in composite building materials, I can attest to the importance of properly installing decking pedestals for any new deck project. The number of pedestals required may seem like a small detail, but it can greatly impact the overall success and longevity of the deck.
I appreciate the straightforward approach of this blog post in outlining the factors that determine the number of pedestals needed, such as deck size, joist and board types, and manufacturer’s instructions. It’s crucial to take all of these factors into consideration to ensure a stable and durable deck.
I also appreciate the detailed description of decking pedestals and their properties. It’s clear that these supports are not only versatile and adaptable to various surfaces, but also durable and able to withstand heavy weight. These are essential qualities for any deck, and using pedestals can greatly enhance access and safety for maintenance and repairs.
In my experience, using decking pedestals is a smart choice for any composite deck project. They not only provide a solid foundation for the deck, but also offer added benefits such as easy access and protection against harsh weather and chemicals. I highly recommend incorporating them into any decking project.
“This article provides a comprehensive guide on how to determine the number of decking pedestals needed for a new deck installation. The author covers important factors such as deck size, materials, and manufacturer instructions, making it easy for readers to calculate their own requirements. The detailed specifications and benefits of using decking pedestals also add value to the post. However, I would appreciate more information on where to purchase these pedestals. Overall, a helpful and informative read for anyone planning a composite deck project.”
As someone who has been working with composite building materials for over 15 years, I can confidently say that decking pedestals are an essential component for any composite deck installation. They not only provide support and stability for the decking boards, but also offer numerous other benefits.
Firstly, the adjustable height feature of decking pedestals allows for easy leveling of the deck, even on uneven surfaces. This eliminates the need for extensive and time-consuming preparation work, making the installation process much more efficient.
Moreover, the frost and heat resistance of these pedestals make them suitable for all weather conditions, ensuring the longevity of your deck. And with a weight capacity of 1000 kg or more, they can easily support heavy loads, making them a reliable choice for any decking project.
But perhaps the most important reason to use decking pedestals is for safe and easy access to the space beneath the deck. This is especially useful for maintenance and repairs, as well as providing a hidden storage space.
In conclusion, I fully agree with the points made in this article and would highly recommend the use of decking pedestals for any composite deck project. They not only offer practical benefits, but also contribute to the overall aesthetic and durability of the deck. Keep up the informative content!
“This blog post is a helpful guide for those planning to install a composite deck using decking pedestals. The author explains the factors to consider when determining the number of pedestals needed and provides useful information about the properties and benefits of these supports. However, I would have appreciated some tips on how to purchase the product, as it can be overwhelming with so many options available in the market. Overall, a well-written and informative article.”
Thank you for your feedback on our blog post about using decking pedestals for composite deck installation. As an expert in composite building supplies, I can attest to the importance of considering factors such as weight distribution and spacing when determining the number of pedestals needed for a stable and long-lasting deck. I’m glad you found the information about the properties and benefits of these supports helpful.
In terms of purchasing the product, I completely understand how overwhelming it can be with the plethora of options available in the market. My suggestion would be to consult with a trusted supplier who can guide you in selecting the right pedestals for your specific project needs. They can also provide valuable tips on installation and maintenance to ensure the best results.
Thank you again for your valuable input. We will definitely take your suggestion into consideration for future blog posts.
This article provides a helpful guide for anyone looking to install a composite deck using decking pedestals. The author breaks down the factors that determine the number of pedestals needed and explains the benefits of using them. As someone who is considering a decking project, I appreciate the straightforward and informative approach of this post. However, I do have a question about purchasing the product. Overall, a great resource for anyone looking to build a deck.
As someone who has been working with composite building materials for over 15 years, I can say with confidence that decking pedestals are a crucial component for any deck installation. They not only provide support and stability for the deck, but also offer a range of benefits that make them a must-have for any decking project.
One of the key advantages of decking pedestals is their adjustability. This allows for precise leveling of the deck, even on uneven surfaces. This is especially important when using composite materials, as they can be more sensitive to unevenness compared to traditional wood decking.
Furthermore, the resistance to extreme temperatures and chemical cleaning products makes decking pedestals a durable and long-lasting solution for any deck. This is important for maintaining the integrity of the deck and ensuring its longevity.
In addition, the ability to support heavy weights and be laid on various surfaces make decking pedestals a versatile option for any decking project. Whether you’re working with a large or small deck, or on different types of terrain, decking pedestals can accommodate and provide the necessary support.
Overall, I highly recommend using decking pedestals for any composite decking project. They not only offer practical benefits, but also add to the overall aesthetic of the deck. So if you’re planning to install a composite deck, make sure to factor in the use of decking pedestals for a successful and long-lasting result.
This blog post is a great guide for anyone looking to install a composite deck using decking pedestals. It covers all the important factors to consider and provides useful information on the specifications and benefits of using decking pedestals. However, I would have liked to see some tips on how to purchase the right number of pedestals for one’s specific project. Overall, a well-written and informative post.
This article is a great guide for anyone considering using decking pedestals for their new deck. It covers all the important factors to consider and provides helpful tips for installation. However, I have a question about purchasing the pedestals. Do you have any recommendations on where to buy them or any specific brands that you have had success with? Overall, a very informative and well-written article. Thank you for sharing your knowledge on this topic.
Thank you for your comment! I’m glad you found the article helpful and informative. As an expert in composite building supplies, I have had a lot of experience with decking pedestals and I agree that they are a great option for new decks. In terms of purchasing them, I would recommend checking with your local hardware store or home improvement center. They often carry a variety of brands and can provide you with recommendations based on your specific needs and budget. Some popular brands that I have personally had success with include Trex, TimberTech, and Fiberon. It’s always a good idea to do some research and read reviews before making a purchase to ensure you are getting a quality product. I hope this helps and best of luck with your new deck!
“Great guide for determining how many decking pedestals are needed for a new deck! The information on factors to consider and the adjustable properties of pedestals are helpful for planning and installation. I’m curious about where to purchase these pedestals and if there are any specific brands or models recommended. Overall, a useful resource for anyone looking to add a composite deck to their outdoor space.”
This article is a great resource for anyone looking to install a composite deck with decking pedestals. The information provided is clear and concise, making it easy to understand the factors that determine how many pedestals are needed for a project. The specifications and benefits of using decking pedestals are also well-explained. I found this article helpful and would love to know more about where to purchase these pedestals.
Thank you for your comment! As an expert in composite building supplies, I agree that this article is a valuable resource for anyone considering a composite deck with decking pedestals. The information provided is comprehensive and easy to follow, making it a great guide for determining the appropriate number of pedestals needed for a project. Additionally, the benefits of using decking pedestals are highlighted, emphasizing the advantages of this method for deck installation. If you are interested in purchasing these pedestals, I would recommend checking with your local building supply store or searching online for reputable suppliers. Thank you for your interest in composite building supplies and I hope this article has been helpful to you!
“Great article! I never knew there were so many factors to consider when determining the number of decking pedestals needed for a new deck. The information on the specifications and benefits of using decking pedestals is really helpful. I’m now wondering where I can purchase them and if there are any recommended brands. Thanks for sharing this informative guide!”
“Great guide for anyone planning to install a composite deck using decking pedestals! The information provided on factors to consider and how to properly install them is very helpful. However, I’m curious about where to purchase these pedestals and if there are any trusted brands you recommend. Overall, a well-written and informative article that has definitely piqued my interest in using decking pedestals for my own decking project.”
This article provides a comprehensive guide on how to determine the number of decking pedestals needed for a new deck installation. The author covers important factors such as deck size, types of materials, and manufacturer’s instructions. The specifications and benefits of using decking pedestals are also highlighted, making it easier for readers to understand their purpose and advantages. However, I would love to know more about where to purchase these pedestals and if there are any recommended brands. Overall, a helpful and informative read.
“Great guide for those planning to install a composite deck using decking pedestals! The article provides useful information on factors to consider and how to properly install them. However, I’m still unsure about how to determine the number of pedestals needed for my specific project. Perhaps including a link to a calculator or providing a general formula would be helpful. Overall, a well-written and informative piece. Looking forward to using decking pedestals for my new deck!”
This article provides a comprehensive guide on how to determine the number of decking pedestals needed for a new deck installation. It covers important factors such as deck size, joist type, and manufacturer’s instructions. I found the information on the specifications and benefits of using decking pedestals very helpful. However, I would like to know if there are any specific brands or models that you recommend for purchase. Thank you for sharing this informative piece.
This article provides a comprehensive guide on how to determine the number of decking pedestals needed for a new deck. It highlights important factors to consider such as deck size, type of joists and boards, and manufacturer’s instructions. The guide also describes the properties and benefits of using decking pedestals, making it a useful read for anyone planning to install a composite deck. However, I would have appreciated some tips on where to purchase these pedestals. Overall, a well-written and informative article.
This article provides helpful information on the factors to consider when determining the number of decking pedestals needed for a new deck. The guide is easy to follow and explains the properties and benefits of using decking pedestals. However, I have a question about where to purchase these pedestals and if there are any specific brands or models recommended. Overall, a useful read for anyone planning a decking project.
“Great article! I found it very helpful in understanding the factors to consider when determining the number of decking pedestals needed for a new deck. The detailed specifications of the pedestals and their benefits make a strong case for using them in deck installation. However, I’m curious about the purchasing process and if there are any specific considerations to keep in mind. Overall, a well-written and informative piece!”
This article provides a comprehensive guide to understanding and calculating the number of decking pedestals needed for a composite deck installation. The information on the specific properties and benefits of using decking pedestals is helpful in making an informed decision. However, I have a question regarding where to purchase these pedestals and if there are any recommended brands. Overall, a well-written and informative article.
“Great article! I’ve been considering installing a composite deck and was unsure about how many decking pedestals I would need. This guide has provided me with all the necessary information and has made the process seem much more manageable. I appreciate the breakdown of factors to consider and the specifications of the pedestals. However, I do have a question about where to purchase them. Overall, a concise and informative read!”
Thank you for your positive feedback on the article! We are glad to hear that it has helped you in your decision to install a composite deck. As an expert in composite building supplies, we understand the importance of providing comprehensive information to our customers. We are happy to hear that the guide has made the process seem more manageable for you.
In regards to your question about where to purchase decking pedestals, we highly recommend checking with your local hardware stores or home improvement centers. They often carry a variety of options and can provide you with further guidance based on your specific needs. Additionally, many online retailers also offer a wide selection of pedestals for purchase.
Thank you again for your comment and we wish you the best of luck with your composite deck project!