Can Composite Decking Be Glued

If you’re considering composite decking for your outdoor living space, you may be wondering if it’s possible to glue the boards together. Composite decking is a popular alternative to traditional wood decking because it’s low maintenance, durable, and resistant to rot, insects, and fading. However, unlike wood decking, composite decking cannot be nailed or screwed in place due to its composition of plastic and wood fibers.

While some installers may use hidden fasteners or clips to secure composite deck boards together, others prefer to glue them. Gluing composite decking can provide a seamless look and eliminate the need for visible screws or nails.

But is it possible to glue composite decking? In this article, we’ll explore whether or not composite decking can be glued and what factors you should consider before doing so.

Understanding Composite Decking Composition

Composite decking has become a popular alternative to traditional wood decking.

It is made from a combination of wood fibers and recycled plastic materials.

While composite decking may look and feel similar to wood, it is actually much more durable and resistant to wear and tear.

The composition of composite decking makes it less likely to rot, warp, or splinter over time.

This is because the plastic materials used in its construction help to prevent moisture from seeping into the wood fibers.

Additionally, composite decking does not require regular staining or sealing like wood decks do.

One question that often arises when considering composite decking is whether or not it can be glued.

While some adhesives may work with certain types of composite decking, it is generally not recommended as a primary method of installation.

Instead, most manufacturers recommend using screws or hidden fasteners for attaching the boards together.

Pros And Cons Of Gluing Composite Decking

Gluing composite decking has been a topic of debate for many homeowners and contractors. While some argue that it enhances the strength and durability of the deck, others claim that it can cause more harm than good.

One advantage of gluing composite decking is that it eliminates the need for screws or nails, giving the surface a smooth finish. Additionally, glue can help to secure individual boards in place, reducing movement and potential warping.

However, there are also downsides to gluing composite decking. For one, it can make repairs difficult as removing glued-down boards can be a laborious process. Moreover, if not applied correctly or with the right type of adhesive, glue may not adhere properly or could even damage the surface of the deck.

It’s important to note that some manufacturers advise against using adhesives on their products as they may void warranties.

In summary, gluing composite decking has both advantages and disadvantages. Homeowners and contractors should weigh these factors before deciding whether to go ahead with gluing their decks. If opting for this method, it’s crucial to follow manufacturers’ guidelines and use appropriate adhesives to ensure optimal results without damaging the surface of the deck.

Types Of Glues Recommended For Composite Decking

We can start by discussing exterior-grade glues, which are typically recommended for composite decking. These glues are designed to be weather-resistant and last a long time, so they’re an ideal choice for outdoor applications.

Polyurethane glues are also a popular option when it comes to composite decking. They’re strong and provide a tight bond, but they can be difficult to work with and require specific application techniques.

So both of these types of glues have their advantages, and it’s up to the user to decide which one works best for their needs.

Exterior-Grade Glues

Have you ever wondered if composite decking can be glued? The answer is yes, but it requires the right type of adhesive.

One of the most recommended glues for composite decking is exterior-grade glue. This type of adhesive is specifically designed to withstand outdoor conditions, such as rain, sun exposure, and temperature changes.

Exterior-grade glue is a popular choice because it creates a strong bond between the composite decking boards. It’s also water-resistant and can prevent moisture from penetrating the deck’s surface. However, it’s essential to choose an adhesive that is compatible with your specific composite decking brand and model. Some manufacturers may recommend a particular glue or discourage the use of adhesives altogether.

Using exterior-grade glue can also help prevent warping and movement in your composite decking boards. This means that your deck will be more stable and durable over time. However, it’s crucial to follow proper installation instructions, including applying the glue evenly and allowing it to dry completely before walking on your deck.

In conclusion, when it comes to gluing composite decking boards together, using an exterior-grade adhesive is recommended for its durability and resistance to outdoor conditions. However, always check with your manufacturer for specific recommendations on which type of glue to use for their products.

By properly installing and gluing your composite decking boards together, you can enjoy a beautiful, long-lasting deck for years to come.

Polyurethane Glues

Now that we’ve established the importance of using exterior-grade adhesive for composite decking, let’s dive into another type of glue that can be used: polyurethane glue.

This type of adhesive is known for its strong bonding capabilities and versatility. Polyurethane glue is waterproof and creates a chemical bond with the material it’s applied to, making it an ideal choice for composite decking.

It also has a longer working time than other types of glue, allowing you to adjust the boards before the glue sets. However, it’s important to note that polyurethane glue may not be suitable for all composite decking brands and models.

Always check with your manufacturer for specific recommendations on which type of glue to use. Additionally, proper application is crucial when using this type of adhesive, as it expands as it dries and can cause excess material to ooze out if too much is applied.

Surface Preparation Before Gluing Composite Decking

Picture this: you finally have your composite decking materials and you’re excited to start building. However, before you begin gluing the pieces together, it’s important to properly prepare the surface. This will ensure that the adhesive sticks and that your deck is structurally sound.

Firstly, make sure to clean the surface of any debris or dirt. A dirty surface can prevent the adhesive from properly bonding with the material. Use a broom or vacuum to remove any loose particles, then wipe down the surface with a damp cloth.

Next, sand down any rough edges or raised areas on the composite decking boards. This will create a smoother surface for the adhesive to adhere to. Be sure to wear protective gear such as goggles and a mask while sanding.

Finally, use an appropriate adhesive for composite decking and apply it evenly along the edges of each board. Press firmly together and hold in place for several minutes until the adhesive has set.

With proper preparation and care, your composite decking can indeed be glued successfully!

Gluing Techniques For Composite Decking

When it comes to composite decking, gluing is possible but not recommended. The reason being that the adhesive bond may weaken over time, resulting in a less secure deck. However, there are certain situations where gluing may be necessary or desired.

If you do decide to glue your composite decking, it’s important to use the right type of adhesive. Epoxy and polyurethane adhesives are typically the most effective options for bonding composite materials. Be sure to follow the manufacturer’s instructions carefully and allow ample drying time before walking on or using your deck.

Another option for attaching composite decking is to use hidden fasteners or clips. These systems eliminate the need for screws or nails, which can detract from the appearance of your deck. They also allow for better ventilation and drainage, reducing the risk of moisture-related damage over time.

In summary, while gluing composite decking is possible, it’s generally not recommended due to potential weakening of the bond over time. If you do choose to glue your decking, be sure to use an appropriate adhesive and follow all instructions carefully.

Alternatively, consider using hidden fasteners or clips for a more secure and visually appealing installation.

Safety Considerations When Gluing Composite Decking

Now that we have discussed various gluing techniques for composite decking, it’s time to address the safety concerns associated with this process. As with any construction work, safety should be your top priority when gluing composite decking materials.

Firstly, it is essential to wear appropriate protective gear such as gloves and eye protection. The glue used in composite decking can be hazardous if it comes in contact with your skin or eyes.

Additionally, ensure that you work in a well-ventilated area to avoid inhaling any harmful fumes.

Secondly, ensure that you follow the manufacturer’s instructions carefully when using glue on composite decking. This will help you understand how much glue is required and how long it takes for the adhesive to dry. It is also important to note that some types of glue may not be suitable for use with composite decking materials.

In summary, while gluing composite decking can be an effective way of securing boards together, it is crucial to prioritize your safety during the process. By wearing appropriate protective gear and following the manufacturer’s instructions carefully, you can avoid any accidents or injuries while working on your deck project.

Maintenance And Repair Of Glued Composite Decking

Maintaining and repairing glued composite decking requires special attention to detail. Glue can deteriorate over time, especially in harsh weather conditions. It’s important to inspect your deck regularly and look for signs of wear and tear. If you notice any areas that are coming loose or have gaps, it’s time to make repairs.

Here are some tips for maintaining and repairing glued composite decking:

  1. Clean the surface thoroughly before making repairs. Use a mild detergent and warm water to remove dirt, grime, and debris.

  2. Allow the surface to dry completely before attempting any repairs. Moisture can compromise the strength of the adhesive.

  3. Use a high-quality adhesive specifically designed for use with composite decking.

  4. Follow the manufacturer’s instructions carefully when making repairs.

By following these tips, you can ensure that your glued composite decking remains strong and secure for years to come. Don’t neglect maintenance and repair tasks – they can help prevent costly damage down the road!


In conclusion, composite decking can be glued, but there are certain considerations that need to be taken into account. Understanding the composition of composite decking and selecting the right glue are crucial in ensuring successful bonding. It’s also important to prepare the surface properly and follow safe gluing techniques.

According to a recent survey, over 80% of homeowners prefer composite decking for its durability and low maintenance. Gluing composite decking can provide additional stability and prevent squeaking or movement over time. However, it’s important to follow manufacturer guidelines and consult with professionals before attempting any gluing projects.

With proper preparation and technique, glued composite decking can provide a beautiful and long-lasting outdoor space for years to come.