Composite decking is an excellent option for decking projects in the UK. The durable, hardwearing material requires significantly less maintenance than natural wood and lasts much longer.
Installing decking is a relatively straightforward job for professionals or people with significant experience.
One important part of your composite decking project will be cutting boards to size. Not all boards will need to be cut, but the ones that do need to be cut precisely.
This guide will take you through everything you need to know about cutting composite decking.
Can You Cut Composite Decking?
The first thing that many people will ask is whether composite deck boards can be cut. In order for your decking material to fit the designated, some boards will need to be cut.
Cutting decking material should only be done with the correct tools, in a well-ventilated area, by experienced workers.
The Tools Needed to Cut Composite Decking
If you are carrying out composite decking installation, the following tools will be required for cutting the composite decking boards.
- Chalk
- Tape Measure
- Speed Square
- PPE
- Mitre Saw
- Circular Saw
- Jigsaw
- Table Saw
It is unlikely you would need all four saw types. The following section discusses these options and their benefits.
What Saw and Saw Blades Best for Cutting Composite Decking?
Deciding on which type of saw and saw blades to use when cutting composite decking is an important choice to make.
Carbide-tipped blades are a good option as they will stay sharp. Avoiding overheating is another important aspect of cutting composite decking, as it can affect the cut.
The number of teeth on a blade will also impact how quickly and accurately you can cut the composite boards.
A low tooth count on saw blades results in a rougher finish but allows you to cut more quickly.
A high tooth count on saw blades will provide a more accurate and fine cut, but it is significantly slower.
Cutting too slowly will allow the blade to heat up and can burn or melt the composite material.
Saw blades with a tooth count of 20 will typically suit a 6-inch saw blade. For a 7.25-inch saw blade, a 24-tooth count is more suitable, and a 40-tooth count saw blade is best for a 12-inch saw blade. We recommend a multipurpose aluminium 60+ tooth x 250mm saw blade.
Circular Saw
A Circular uses a rotary motion to spin the saw blade around an arbour. Circular saws are versatile power tools used professionally and in DIY projects.
The sharp saw blades are disc-shaped, and larger saw blades can be used for a deeper cut. The amount of teeth a circular saw blade has will affect the speed it can cut at.
Table Saw
Unlike circular saws, table saws are not mobile. The circular blade on a table saw is mounted on an arbour and will have an electric motor to drive it.
The blade comes through the table, and the composite board is then pushed into it for an accurate cut.
This differs from the circular saw that is controlled and pushed against the secured decking board.
The blade can be moved up and down to adjust the depth of the cut. You can also explore composite cutting table saw blades that are specially designed for cutting composite materials.
Miter Saw
A mitre saw, also spelt “miter saw” in some cases, is a saw that is mounted on a pivoting swing arm that allows the user to quickly and accurately cut at various angles.
Triple chip tooth mitre saw blades are available to produce a fine cut that won’t chip the delicate plastic veneer of a composite deck board.
Jigsaw
A jigsaw is a much more accurate saw type that allows the user to cut curves and shapes.
A jigsaw is a great option for cutting composite decking that needs to go around shapes such as drain pipes.
Thin, flexible jigsaw blades are easier to cut curves with, and the teeth are measured in teeth per inch (TPI). A high TPI results in finer, smoother, and more accurate cuts.
How to Cut Composite Decking Boards
Now that you know all about the cutting tools needed to cut composite decking boards, you may want to know more about the cutting process.
It is important to mention that before you start cutting different materials, you must ensure your safety is a priority.
Always work in a well-ventilated area, and make sure you wear the necessary PPE. Your personal protective equipment should include a dust mask to minimise the risk of inhaling airborne particles.
Safety goggles should always be worn when using a saw to protect your eyes from chips or broken blades that can occur. Alternatively, a face shield can be used to give you additional protection.
Hearing protection is also recommended, as saws can be extremely loud. Gloves and loose-fitting clothing should be avoided when working with power tools to minimise the risk of it getting caught.
Composite Board Preparation
Preparing your boards to be cut is essential. Cleaning the boards and storing them in dry places out of direct sunlight is important.
Composite decking can be affected by thermal expansion, so cutting them when they are cool will allow you to get a more accurate cut.
You should then ensure the outer edges of the board are square. To do this, you should measure an eighth of an inch from the edge using a speed square. A chalk line should be drawn down the board length, and this area can be cut.
Measuring
Accurately measuring the area where your decking installation will take place and taking into account the required gaps between boards and external walls is essential. Only then will you be able to measure your boards accurately.
Allowing additional length, so the board overhands the subframe, will allow you to cut and create a flush finish. It is always better to allow additional length at this point as this allows you to cut it down accurately. Cutting too short will result in a wasted deck board.
Straight Cut
Straight cuts are the most straightforward and are typical of square or rectangular decking areas.
Using chalk to mark where to cut clearly is advisable. This can then be cleaned off or removed for adjustments.
Angle Cut
Decks that feature diagonal sections or edges might seem like a daunting task, but this can be as straightforward as straight cuts with the correct planning and tools.
With the correct saw blades, using a mitre saw to cut at the required angle is simple.
Measuring the correct angles is an important part of this process and taking care to ensure your measurements are correct is vital.
Cutting Curved Boards
Curved boards can be cut in the same ways that straight and angled boards are.
The main difference is that the shape or curve of a board may require additional cuts to be made near the edges.
Installation
After cutting the boards, you will then have the task of installation to consider. Following the supplier’s directions is important, as deviating from these instructions can result in a warranty being voided.
Suppliers will provide explicit instructions on how their product should be installed, and the accessories that are also provided must be used to fit the boards.
Poor installation can limit the performance and lifespan of your composite decking, so you must have the experience to do this yourself or employ a reputable tradesperson.
FAQS
Should I sand Composite decking after cutting it?
No, composite decking should never be sanded. Sanding composite decking can void the warranty. Only first generation composites can be lightly sanded.
Using saw blades with more teeth will result in smooth cuts that can be wiped down for a clean edge.
Should I seal the ends of composite boards after cutting?
You will be able to seal the ends of composite decking using lumber wax to prevent your deck boards from absorbing moisture.
Can I screw directly into composite decking?
You should not screw directly into composite decking; instead, you should use the hidden fasteners provided by the supplier.
Hidden fasteners are designed to securely hold the deck boards in place while allowing for the natural thermal expansion of the boards in hot weather.
Screwing directly into a composite board will pin it in place. As the board expands in the heat, it will put pressure around the screwed-in area and cause the board to warp.
How do I protect timber deck joists?
Your subframe is an essential part of your deck as it is designed to support the weight of the composite decking.
Ensuring your subframe is protected against the elements will give it a longer life. Using joist tape to cover exposed timber will protect it from moisture.
Joist tape is typically made of butyl or asphalt to protect it against rot or decay.
How do I choose a deck shape?
Choosing a deck shape will depend on the garden, the space available, and what you plan to use the area for.
A long narrow deck will be adequate for relaxing outside but might not be adequate for entertaining or garden parties.
You should consider the area you are interested in getting decked, and also look at how the sunlight comes into your garden to ensure you create a space that suits your needs.
Final Thoughts
If you plan to install composite decking in your garden, using a professional is a great way to ensure you get the finish you want.
If you have the necessary experience, composite decking boards should be relatively straightforward to install.
Cutting composite deck boards will typically be necessary, but using the right tools will also make this a straightforward task.
Your main priorities when cutting composite decking should be safety and accuracy.
Wearing the correct PPE and using power tools safely is an important part of any DIY work.
Taking the time to accurately measure the deck boards before cutting them should minimise the risk of mistakes.
Always try to leave a bit of additional length before checking. You will then be able to work on the board to get an accurate finish.
Taking the time to read the installation and warranty guidelines will help you to ensure the decking is safely installed and minimise the risk of voiding a warranty.
If you haven’t yet ordered your composite decking and are ready to after learning how to cut it to fit, give us a call or an email today.
Comments (23)
This article on cutting composite decking is extremely informative and helpful. It’s great to know that composite decking is a durable and low maintenance option for decking projects in the UK. The step-by-step guide on cutting the boards is very useful for those looking to install decking themselves. I do have a question about purchasing the product – is there a specific brand or type of composite decking that you recommend for cutting purposes? Thank you for sharing this valuable information.
“Great article on cutting composite decking! As someone who has recently installed a composite deck, I can attest to the importance of precise cutting for a professional finish. The list of necessary tools is helpful, but I do have a question about purchasing the product itself. Do you have any recommendations on where to buy high-quality composite decking boards in the UK? Thanks again for the informative guide!”
This article was very helpful in explaining the process of cutting composite decking. I appreciate the detailed list of tools needed and the reminder to only cut the material with the correct tools and by experienced workers. I am interested in purchasing composite decking for my own project and was wondering if you have any recommendations on where to purchase the material? Thank you for sharing this informative guide.
Are you sure this article is accurate and reliable? Have you personally used composite decking before? I would like to know your personal experience with purchasing and using this material. Thank you.
“Great guide for those looking to install composite decking! It’s reassuring to know that the material requires less maintenance and lasts longer than natural wood. However, I’m curious about where to purchase the necessary tools for cutting the boards. Would you recommend buying them or renting them for a one-time project? Overall, a helpful and informative read for anyone considering composite decking.”
“Great guide on cutting composite decking! It’s reassuring to know that this durable and low maintenance material can be easily cut to fit any decking project. I appreciate the detailed list of tools needed and the reminder to only have experienced workers do the cutting. I’m considering using composite decking for my next project and this article has given me the confidence to do so. Do you have any recommendations on where to purchase high-quality composite decking materials? Thanks!”
“Great guide on cutting composite decking! It’s reassuring to know that this durable material requires less maintenance than wood and can last longer. The list of tools needed for cutting is helpful, but I’m wondering if there are any specific brands or models that work best for this task? As someone looking to purchase composite decking, it would be great to have a recommendation for a reliable and efficient cutting tool. Thanks!”
This blog post is a comprehensive guide on how to cut composite decking, a popular decking option in the UK. As someone who has installed composite decking before, I can attest to the importance of precise cutting for a seamless finish. The post covers all the necessary tools and safety precautions needed for cutting composite decking, making it a helpful resource for both professionals and DIY enthusiasts. I appreciate the mention of different saw types and the reminder to work in a well-ventilated area. Overall, this article is well-written and informative, providing valuable insights for anyone looking to install composite decking.
“Great article on cutting composite decking! As someone who is planning to install a composite deck, this guide has been really helpful in understanding the tools needed and the importance of precise cutting. However, I do have a question about purchasing the product. Is there a specific brand or type of composite decking that you recommend for UK weather? Thank you for sharing this informative piece!”
“Great article on cutting composite decking! It’s good to know that this material is not only durable and low maintenance, but also easily customizable to fit any decking project. The list of tools needed is helpful for those looking to purchase or rent the necessary equipment. I wonder if there are any specific brands or types of saws that work best for cutting composite decking? Overall, this guide provides valuable information for anyone considering composite decking for their outdoor space.”
As an expert in composite building materials, I can attest to the fact that composite decking is an excellent option for decking projects in the UK. Its durability and low maintenance make it a superior choice compared to natural wood.
In terms of cutting composite decking, it is important to note that not all boards will need to be cut. However, for those that do, it is crucial to use the correct tools and have experienced workers handle the task in a well-ventilated area.
The tools listed in the blog post are indeed essential for cutting composite decking boards. However, I would like to add that using a carbide-tipped blade is highly recommended for a clean and precise cut. Additionally, a dust mask should also be worn to protect against any potential harmful dust particles.
Furthermore, it is important to consider the type of saw to use depending on the size and thickness of the decking boards. For example, a circular saw or jigsaw would be more suitable for thinner boards, while a table saw would be better for thicker boards.
Lastly, I would like to emphasize the importance of measuring and marking the boards accurately before cutting to ensure a professional and seamless finish. With the right tools and techniques, cutting composite decking can be a straightforward task for professionals or those with significant experience.
Overall, this guide provides valuable information for anyone looking to install composite decking and I would highly recommend following these tips for a successful project.
“This blog post is a helpful guide for anyone looking to install composite decking. It provides useful information on cutting composite boards and the necessary tools for the job. As someone who is considering a decking project, I found this article to be informative and well-written. However, I do have a question about where to purchase the product. Overall, a great resource for those interested in composite decking.”
“Great article! I’ve been considering using composite decking for my own project and this guide has been really helpful. I appreciate the detailed information on the tools needed for cutting the boards. However, I’m wondering if there are any specific brands or types of saws that work best for cutting composite decking? Any recommendations would be greatly appreciated. Thanks!”
“Great article on how to cut composite decking! As someone who is considering a decking project, I found this information to be very helpful. I appreciate the thorough guide on the tools needed and the reminder to always cut the boards precisely. However, I was wondering if there are any specific brands or types of composite decking that you recommend for purchase? Thank you!”
This article is a great resource for anyone looking to install composite decking. The step-by-step guide and list of necessary tools make the process seem manageable for both professionals and experienced DIYers. However, I’m wondering if there are any specific brands or types of saws that are recommended for cutting composite decking? Overall, a helpful and informative read for anyone considering this type of decking for their project.
What evidence do you have to support the claim that this article is a great resource for installing composite decking? Have you personally used the step-by-step guide and list of tools, and if so, did you find it manageable? Additionally, can you provide any recommendations for specific brands or types of saws for cutting composite decking?
As someone who has been working with composite building materials for over 15 years, I can attest to the fact that composite decking is indeed an excellent option for decking projects in the UK. Its durability and low maintenance make it a top choice for many homeowners.
In regards to cutting composite decking, I completely agree with the points made in this article. It is crucial to use the correct tools and have experience when cutting these boards to ensure precise cuts and a successful installation. I would also add that it is important to use proper safety gear, such as PPE, when handling any type of building material.
While the article mentions the necessary tools for cutting composite decking, I would like to emphasize the importance of using a high-quality saw blade specifically designed for composite materials. This will not only ensure clean cuts, but also prevent any potential damage to the boards.
Additionally, I have found that using a speed square and chalk can greatly assist in marking and measuring cuts accurately. This may seem like a small detail, but it can make a big difference in the overall outcome of the project.
Overall, this guide provides valuable information for anyone looking to cut composite decking. As with any building project, it is always best to consult with professionals or experienced individuals to ensure a successful and safe installation. Thank you for sharing this informative article.
“Thank you for this informative guide on cutting composite decking. It’s great to know that this durable and low-maintenance material is a great option for decking projects in the UK. I found the list of tools needed to be very helpful, but I do have a question about purchasing the product. Can you recommend any specific brands or retailers that offer high-quality composite decking? Thank you!”
“Great article on cutting composite decking! It’s good to know that this material requires less maintenance and lasts longer than natural wood. Your guide on the tools needed and proper techniques for cutting is very helpful. I’m interested in purchasing composite decking for my own project and was wondering if you have any recommendations on where to buy it? Thanks for sharing this informative piece!”
“Great article! I’ve been considering using composite decking for my own project and this guide has been really helpful in understanding the cutting process. I’m glad to know that it’s possible to cut the boards and that it’s important to use the right tools and take proper safety precautions. I’m curious about where I can purchase the decking material – do you have any recommendations or suggestions? Thanks for sharing this informative post!”
This article on cutting composite decking was very informative and helpful. I appreciate the detailed explanation of the tools needed and the importance of precision when cutting the boards. I am interested in using composite decking for my own project and this article has answered my question about whether or not it can be cut. I will make sure to use the correct tools and follow the guidelines mentioned here. Thank you for sharing this valuable information.
“Great article on how to cut composite decking! As someone who is considering installing composite decking in my own backyard, I found this guide to be very informative and helpful. I appreciate the detailed explanation of the tools needed for cutting, as well as the reminder to only do so in a well-ventilated area by experienced workers. One question I have is where can I purchase the composite decking material mentioned in this article? Thanks!”
“Great article on cutting composite decking! It’s helpful to know that not all boards will need to be cut, but the ones that do require precision. The list of tools needed for cutting is also useful for those planning a decking project. However, I’m curious about where to purchase composite decking and if there are any specific brands that are recommended. Overall, a thorough and informative guide. Thanks for sharing!”