There are two main ways to fix composite decking: using hidden clips (also called fasteners), or by face fixing with screws.
There are advantages and disadvantages to both options which we will review in this blog post. In addition, we’ll give you advice on what you need to consider when purchasing clips or screws for your composite decking project.
What is face-fixing?
Face-fixing refers to drilling the face of the deck board, counter-sinking and driving a screw into place to fix the board directly to the subframe below. Matching coloured screw heads or plugs can be used to hide the screw if desired for a cleaner look.
Advantages of using screws:
- It’s the most common fixing method of decking, as it’s the same method used for timber decking, so you’ll likely find your decking installer prefers this method
- It looks more authentic e.g looks more like a timber decking finish
What is a hidden fastening system?
A hidden fastening system enables decking to be fitted without having to screw directly into the top of the board. Deck boards that are fitted with clips have a groove running down their side. The hidden fastener is clipped into this channel and then the clip is screwed into the supporting joist.
Advantages of using clips:
- Clips should make the board easier to remove if it needs replacing
- Offers a seamless aesthetic, as no screws are visible on the finished deck
- Automatically spaces the deck boards with the correct gaps for expansion and contraction
You’ll find many articles online claiming that one method allows a faster installation than the other. In reality, it depends on the installer and what method of fixing they are used to, or they prefer to use.
When to use clips or screws for fixing composite decking
In general, capped deck boards are clip fixed, whilst uncapped boards are face fixed with screws (learn about the difference between capped and uncapped composite boards).
At the same time, solid boards are usually screwed (but not always, see our capped Evolution range!) and hollow boards are clip fixed, due to the board’s ‘hollow’ structure meaning the screw has nothing to ‘grip’ to (learn about the difference between hollow and solid composite boards).
You should never screw directly through the top of a hollow composite deck board as this will cause irreversible damage to the board. You should always use a hidden fastener system.
In summary, the design and make up of your deck board will determine the fixings you require. For example, at Ecodek our capped decking collection, Evolution uses a hidden clip fixing system, whilst our uncapped collections, Heritage, Signature AT, Signature HD, Essentials and Stadia, are face fixed (all are solid for optimum quality!).
It’s therefore wise to ask your decking manufacturer or supplier which fixing method your chosen boards should use, as this can have an impact on the finial finish of your project.
We advise that you choose your boards based on their aesthetics, not fixing system, as both clips and screws allow for a quality installation.
Things to consider when buying composite decking screws and clips
1. Choose the right fixings
Before purchasing any screws or clips, make sure you carefully read the manufacturer’s installation instructions, or speak to your decking supplier, to determine which type of fixing has been recommended.
Using screws instead of clips, especially when your decking is hollow will cause big installation issues and most likely void your warranty. Equally, unless your boards have grooves, you won’t be able to use clips.
If using clips, you may find that some of your boards or fascias are face fixed, so read through your installation instructions prior to starting the job. For example, Ecodek’s Evolution collection uses a clip system but the first and last boards are always face fixed for extra strength.
2. Use the manufacturer’s recommended screws or clips
It’s important to use the specific brand, size or material of fixings, recommended by the decking manufacturer. Using an alternative can be cheaper but will often result in damaging your boards and voiding your warranty.
For example, it’s important to use screws that have been specifically designed for use with composite materials. Ecodek’s screws are made from stainless steel, have a courser thread for better fixing, and a concave head for a more seamless finish.
Our blogs on What screws do I need for composite decking and How to screw down composite decking will both help guide you through face fixing.
3. Calculating the right amount
Use our online decking calculator, or contact our decking experts who will work out your fixing requirements.
Ecodek can help
If you’re still unsure on the best fixings for your composite decking boards and would like some expert advice, call our friendly team today on 01978 667 840.