Category: Learn Decking

What Is Capped Composite Decking Board?

M. John

Composite material offers a lot of benefits when compared to timber decking. It is more durable, beautiful and lasts longer than wood. But there are different composite decking types in the ultradecking that you can use. There is the capped, uncapped, grooved as well as ungrooved decking. This article will focus more on capped composite decking.

The Capped Composite Decking

The capped composite decking is a composite decking board with an extra plastic layer on its outer part. Remember that composite decking is made from a mixture of recycled plastic material and wood fibers. These two materials are processed in the factory to form a composite decking board.

Composite decking is a more durable material than timber decking. The combination of wood and plastic gives the composite decking its strength. Wood-plastic decking is a strong material that can not crack or break easily, like wood.

What Is Capped Composite Decking Board?

Timber decking can crack or break if a lot of people are standing on it. The wood does not have the strength of composite decking to withstand pressure. Composite decking can bear high foot traffic and will not crack. It made composite decking a more durable material than wood.

Apart from being durable, composite decking is resistant to water and moisture. Wood decking will absorb moisture from the atmosphere, but composite decking will not absorb moisture. Also, the boards will not absorb rainwater if you install them outdoors. But there are some kinds of composite decking that have high water resistance.

The uncapped composite decking will absorb water if you Install it in a moist area. This type of composite decking does not have a plastic coating on its outer layer. They have low water resistance, but since it’s made from plastic and wood, they will not absorb water easily like wood decking.

But the capped composite decking has an added layer of plastic on its surface. It makes the board more resistant to water than the uncapped decking. The capped composite decking is good for installing in moist areas as it does not absorb moisture.

Type of Capped Composite Decking

There are different capped composite boards. Remember that the capped composite decking has an extra layer of plastic on its outside parts. There is one side capped decking that has an extra plastic coating on one side of the board. The coating is always on the part that faces up after installation.

Then, the two sides capped decking has a plastic coating on the top and bottom of the board. The three sides capped composite decking has plastic coating just on the top, bottom and one side of the board. Additionally, there is also composite decking with the whole side capped. This type of capped composite decking is the best as moisture or water will not be able to infiltrate the board.

Advantages of Capped Composite Decking

Resistant to Moisture 

Capped composite decking will resist moisture more than uncapped decking since it has an additional plastic coating. The board will not swell like wood. It is the best type of composite decking to install to prevent any chance of moisture from getting to the board. If you plan to install decking around your swimming pool, it is best to use composite decking with the whole side capped.

Long-lasting Colour

Composite decking comes in varieties of colours. Light grey, dark grey, light brown, dark brown and silver are the most common decking colours. If you use capped wood-plastic decking, the colour will not fade.

Wood decking will fade on exposure to sunlight you have to keep staining or painting the woods to make it beautiful. But composite decking, especially the capped decking board colour, will last for a long time. It has UV protection on its outer layer that prevents UV rays from fading the board’s colour.

 Scratch Resistant

Composite decking is prone to scratches. Children’s toys and even pets can scratch the surface of the decking. But the capped decking board is scratch resistant because of its additional plastic coating. If you install the capped decking in your garden, your kids and dogs can play on it without being worried that it will scratch.


The capped composite decking is a type of decking with an additional layer of plastic on its surface. It makes the decking have a high resistance to moisture, less likely to fade and also scratch resistance.

What Material Should I Use for My Rooftop Decking?

M. John

When it comes to building a rooftop decking, you need to use the right material. The material to use for your roof decking should be durable and long-lasting. What kind of material is suitable for making rooftop decking? Homeowners will like an answer to this question. Luckily, we have written this article to help you find out.

Roof Decking Materials

What Material Should I Use for My Rooftop Decking?

There are different types of composite decking materials that you can use to build decking on your rooftop. You can use the same decking material as ground decking to also build a rooftop decking. Examples of flooring materials are wood or timber decking, composite decking and PVC decking. These types of outdoor flooring are the most common decking materials available in the market. When you consider each of these materials, you’ll be able to choose the best type of material to use in building a rooftop deck.

Composite Decking 

Composite is regarded as the best flooring material to use in building a decking. This is because composite decking is solid and durable and has a long life span. Plastic wood decking is a material that you will like if you use it to build decking on your roof.

The engineers made composite decking with a mixture of wood and plastic material, making it superior to timber and plastic decking. The plastic wood decking material is so strong that it is highly resistant to termites and other wood-eating insects.

Besides that, composite decking is also resistant to water. The plastic wood board has a plastic film on its surface that prevents water from penetrating it. If rain should fall on your roof decking, composite boards will not absorb water.

Additionally, composite decking is a good option because its colour does not fade. The decking has UV ray protection on its outer layer that prevents the board’s colour from fading. Also, plastic wood decking will not require painting or staining like wood. This is because it is a decking material that homeowners valued for its aesthetics. A composite board can last for a long time and still stay beautiful.

Wood and Timber Decking 

Timber decking is a traditional decking material you can install on the ground and rooftop of your home. You can use either treated wood, cedar, redwood or IPE for wood decking. Lumber decking is a cheaper option with less value compared to the composite board.

In terms of aesthetics, timber decking does not equate to composite decking. The colour of the wood fades on exposure to ultraviolet rays. To maintain the look of timber, you will need to apply stains on it. Also, when it comes to choosing a material for your rooftop decking, wood isn’t the best option.

Wood decking can warp, break or splinter over years of use. It is also not resistant to weather conditions. The timber decking will absorb moisture and swell when humidity is high. They are also not resistant to water. Timber decking will require sealing to make it water-resistant. Apart from that, timber decking is also susceptible to termite damage.

Maintaining wood decking is stressful and will require a lot of cash, as you will have to stain or paint your rooftop decking annually. You will also need to waterproof a timber decking to prevent it from absorbing water or moisture.

 Plastic Decking

Plastic or PVC decking contains 100% plastic, making it a waterproof decking material. They are the most expensive type of decking material you can use for ground and rooftop decking. Plastic is also resistant to rot, like composite decking material. It is also durable and will not warp, crack or splinter like wood. PVC decking has similar features to composite decking, but the latter has a longer lifespan than the former.

PVC is a good decking material you can use for rooftop decking. Using plastic is less stressful and also easier to maintain, like composite decking. You don’t have to worry about applying paint or stain, seal or sand to the surface of your plastic decking.


The material to be used for rooftop decking should be durable. Of all the materials mentioned in this write-up, composite decking is the best option. It is durable and easy to maintain. Also, composite decking also has an extended lifespan compared to wood and plastic decking.

What Is a Rooftop Deck?

M. John

If you don’t know what a rooftop deck is, this article will make you understand. The rooftop deck is the type of deck you install on the roof. Most people are familiar with a ground deck built with composite decking in their garden. But you can also build a deck on your roof. A deck on top of a building allows you to enjoy your landscape view better. Building a rooftop deck isn’t a bad idea if you have extra space on the top of your house. Keep reading as this article discusses more on the rooftop deck, its material and benefits.

Rooftop Decking

What Is a Rooftop Deck?

A rooftop deck is an outdoor decking space situated on the top of a large building. It is a type of deck you built on a flat roof. This type of deck can also be referred to as a floating deck since it’s not secure in place. Building a rooftop deck is easy; it is like you are installing the decking over concrete.

Before you start laying decking on your rooftop, ensure that the roof is strong enough to hold the weight of the decking. You should also review your local building code to see whether a rooftop deck is allowed in your locality. If your local building office grants you permission to build a deck on your roof, ensure you use the right decking material. Let us consider some of the decking materials you can use to build a rooftop deck.

Types of Decking Material You Can Install on Your Roof

Ultradecking have different decking materials for constructing roof decking. Wood, plastic and composite decking are examples of roof decking materials.

Wood Decking

Wood is a type of decking material you can use for your rooftop deck. It is a natural decking material with a good texture. Timber decking can have a lifespan of 15 years with proper maintenance.  But because it is not durable enough, using wood to build your roof deck isn’t the best idea.

Timbers are not water-resistant; they will swell and may eventually decay as the year passes. Also, wood is not resistant to termites, and they are susceptible to termite damage. The rooftop timber decking will require more maintenance as you will have to paint or stain the decking to make it beautiful.

Composite Decking

Apart from wood, you can build a rooftop deck with composite. Composite decking is a strong and durable material homeowners can use in building a roof deck. The material is easy to maintain as it is not susceptible to damage.

Composite decking is water-resistant and will not swell or rot. It is also resistant to termite damage. Apart from that, composite decking has a longer lifespan of 30 years and is also easy to maintain. If you use composite board material to make a decking on the top of your home, you will enjoy it.

Plastic Decking

Plastic decking is another decking material homeowners can use to build a rooftop deck. This type of decking material is also resistant to water and termites like composite decking. It is also easy to maintain and has a lifespan of up to 20 years.

 Benefits of a Rooftop Deck

Building decking on your roof has a lot of benefits. Here are some of the benefits you can get if you build a rooftop deck.

A composite roof deck, especially those with a view, can increase your home value. Homeowners who are looking to auction their homes can build a rooftop deck with composite boards. When potential buyers see a deck on your roof,  they will be more willing to buy your home. A rooftop deck will add value to your home when you compare it with a house without one. The roof deck will make your home stand out, making it a focal point for visitors.

Additionally, homeowners can also extend their interior living space to a deck on the top of their homes. The deck can serve as a lounge or an outdoor dining area. You can also enjoy an outstanding view of your landscape while relaxing on your deck.

Homeowners can also use the deck on their roof gardening. They can use the area to grow flowers and vegetables. Get a planter and use it to grow vegetables on your roof deck.


A rooftop deck is a type of deck that you can build on a flat roof. If you have extra space on your roof, you can build a deck with a composite board.

Which Deck Material Lasts the Longest?

M. John

Which deck material lasts the longest? There are different kinds of deck materials in Ultradecking. There is wood decking, composite decking, and PVC decking. Knowing the kind of deck material that will last the longest might be a little bit difficult for you. If you want to know which deck material lasts the longest, you have to examine the different types of deckings, their advantages, and their disadvantages.

Types of Deck Material

Which Deck Material Lasts the Longest?

As mentioned earlier, there are varieties of deck materials, and each of these decking boards has its advantages and disadvantages. Let us consider each deck material to know which one will last the longest.

Wood Decking

Wood decking is a natural deck material made that can last long. Wood decking has a natural look and texture. They blend well with any existing structural design, making them a preferable choice by homeowners.  Besides that, wood decking is also more affordable than other decking types.

There are different types of wood the manufacturers use in making wood decking. Among the woods are pressure-treated wood, cedar and redwood. Pressure-treated wood contains chemicals. Wood undergoes a chemical treatment at high pressure to form pressure-treated decking boards. The chemicals used in treating the wood prevent the wood from rotting. Apart from that, it also prevents fungi and insects like termites from growing. It makes pressure-treated deck material last longer than untreated wood.

Redwood and cedar are other kinds of wood deck materials that will last for years. They don’t contain chemicals like pressure-treated timber. But they are strong and also resistant to insects, rot and fungi. Besides that, they can also withstand the elements and strive in moisture areas.

Disadvantages of Wood Decking

Since wood is prone to damage, wood decking requires a lot of maintenance. If you have a wood deck in your home, you will need to treat the deck to make it last for a very long time.

Also, wood decking colour can fade over time. Hence they require annual staining or painting to maintain their looks.

Apart from that, wood decking can splinter over time. A wooden deck can crack due to the wear and tear of the material.

In addition, a wood decking board will swell if it absorbs water; to keep that from happening, you will need to waterproof your deck. You can waterproof a wood deck by coating it with sealers.

Composite Decking

Composite decking is another type of deck material that can last for years. It looks like a wood decking but is not as natural as wood. Composite decking is a composite material that contains both wood and plastic. These two materials are what make up the composite decking board. The composite decking board is also known as wood-plastic decking.

Wood-plastic decking boards are visually more appealing than wood and can stay beautiful for years. When it comes to which deck material lasts longer, composite decking lasts longer than wood. This is because composite decking is stronger and more durable than wood.

Composite decking material tends to last longer because it is less prone to damage. A wood-plastic deck will not crack and splinter like wood. Apart from that, composite decking is resistant to insects that cause damage to wood. This means that termites cannot damage a composite board. The material is so much stronger than wood that termites can not eat it.

Additionally, composite decking is resistant to moisture. It will not swell and get damaged since it does not absorb moisture. A composite board can span up to 30 years and above.

 Disadvantages of Composite Decking

The disadvantage of wood-plastic decking is that it is more expensive than wood decking.

PVC Decking

PVC decking is also a deck material similar to composite decking. But it differs from composite in that it contains plastic only. PVC deckings are also durable and long-lasting, like composite decking. They are also resistant to insects and water and will not rot. PVC is a good decking option if you want a deck of material that lasts longer.

Disadvantages of PVC

The downside of PVC decking is that it is costly. It is more expensive than composite decking.

In addition, PVC is synthetic. It does have the look of natural wood.


The deck material that lasts the longest is composite decking and PVC decking. Composite decking is preferred to PVC because it is visually appealing and has the look of wood.

Will a Composite Decking Board Rot?

M. John

Will a composite decking board rot? Since wood can rot if you expose it to moisture, you might have wondered if composite decking will rot too. Rotting is peculiar to wood; unlike wood, composite decking boards cannot rot. Composite deckings are resistant to rot even if you expose them to moisture. This property gives the composite board an advantage over wood decking. To understand why the composite board does not decay, let’s see what composite decking is.

What is Composite Decking 

The word composites means a combination of two different materials. Ultra Decking composite board consists of two different materials. It is not like wood decking that is pure wood. Composite decking contains wood particles and recycled plastic material. The combination of these two materials made the composite decking board superior to wood decking.

Composite decking floor installed beside a small garden
A Brown composite decking project, installed beside the garden without fear of rot.

Wood is naturally beautiful, and so is composite decking. But a composite board can stay more beautiful for decades than wood. Apart from that, composite decking is more durable than wood. It is resistant to splintering and will not crack. Also, because composites are stronger, composite boards can not warp like wood.

Composite boards are also easier to maintain than wood. If you have a composite deck, you can easily maintain it without spending much money. It is not like wood that you have to sand before treating it to make it last longer. Also, composite decking has a prolonged lifespan compared to wood boards. Although you can treat a wooden board to make it last longer, it can’t stay as long as composite decking.

Lastly, wood can rot or decay, but a composite deck can not rot. It takes us back to the question of whether composite decking will rot. The answer is no. The composite decking board will not rot. Let’s see why composite decking does not rot.

Why Composite Decking Does Not Rot

Composite decking will not rot because it is durable and resistant to water or moisture. The composite decking board consists of wood fibre and plastic material. These materials are combined with a bonding agent to form a durable composite decking board. The wood in the decking gives the decking board its strength, while the plastic in the decking board makes it resistant to water.

Wood decking, on the other hand, differs from composite decking. Wood decking that does not contain plastic-like composite decking. Wood will swell if it absorbs water or moisture. And will eventually rot over time.

The material will rot in the presence of water or moisture. When water soaks the material, the material will rot eventually. Still, composite decking, on the other hand, will not rot since it is resistant to water, making it difficult for it to rot like wood.

Types of Composite Decking Board

However, there are two types of composite decking material you can use in building a deck. Here is the capped and uncapped composite decking board.

Capped Composite Decking

Capped composite decking boards have high water resistance. This is the most common type of composite decking homeowners prefer. One reason is that the capped composite decking has a plastic coating on its outer layer. The plastic coating around the capped composite decking board makes it difficult for water or moisture to penetrate it.

Because they have high resistance to water or moisture, the capped composite decking board is suitable in high moisture areas. You can install it by the dockside or by the poolside without worrying that the decking will swell. They have a high water resistance due to the plastic coatings and will last for a very long time.

Uncapped composite decking

The uncapped composite decking board is not like the capped composite decking. It differs from the capped decking as it does not have a plastic coating around it. Uncapped composite decking boards are less resistant to water than capped composite decking. They are not suitable for use in places with high moisture. But this does not mean that the uncapped decking will not last for long. They are also durable and will last for a very long time.

However, the uncapped composite board is suitable in areas with less moisture. So, if the place you want to install your deck is dry, the uncapped composite decking board will be suitable for building a deck. Also, if you are planning to build the decking over a shaded area, you can use the uncapped composite board. The roof will protect the decking and keep it from absorbing water.


Will a composite board rot? No. The composite decking board is resistant to rot. It is resistant to water or moisture, which in turn keeps the board from rotting.

What Lengths Do Decking Boards Come In?

M. John

Building a deck in your home can be a great addition to your outdoor space. You will be able to perform different activities on it. However, knowing the right deck dimensions can be very tough for you, especially if you are new to deck building. There are different kinds of decking boards with varying lengths in the Ultradecking. We will consider the length of the decking boards that come in.

Types of Decking Boards

What Lengths Do Decking Boards Come In?

Composite Decking

Composite boards are durable decking materials. They contain wood fibres and recycled plastic. They are resistant to moisture and cannot rot. Apart from that, composite boards are available in different colours that can not fade like wood. They cannot warp, crack or splinter. The length of the decking board varies. It varies from 6 to 20 feet. You can choose a board size that is suitable for your deck size.

Pressure Treated Wood

These kinds of decking boards are from pressure-treated pines. The chemical in the wood prolongs the lifespan of the wood. It keeps the decking from fungus, thereby keeping it rot-free. Pressure-treated wood deckings are also resistant to insect damage. Insects like termites will not be able to penetrate the wood due to the chemicals in it. They are available for use in different lengths. The length of the decking board varies from 2 x 6 inches to 5/4 x 6 inches.


Decking boards made from cedar are also resistant to rot and decay. They contain chemicals that protect the wood against fungus as well as insect damage. Cedars can thrive in different climate conditions and are suitable for decks. The various lengths of the decking boards allow you to choose a length that will suit your deck size.

PVC Decking

PVC deckings contain 100% plastic. They are durable decking materials that can last for several decades. They are waterproof and won’t rot or decay. Additionally, PVC is also resistant to mould and does not need oiling, staining or sealing to make it last longer. The length of the decking board also varies. You can always buy a board size of your choice.

Aluminium Decking

Aluminium decking boards are available in powder-coated finishes, silver, and grey. The length of the decking boards is up to 36-feet. Aluminium decking requires little to no maintenance. They cannot warp, crack or splinter. Besides that, aluminium decking can not fade; no worries about oiling, staining or painting. It is also resistant to mould.

Length of Decking Boards

The length of the wood decking board is commonly available in 2 x 6, and 5/4 x 6.  5/4 x 6 inch wood is good for decking. While the 2 x 6 is thicker and stronger, their width varies as much as ¼ inches. If the nominal dimension for wood decking is 5/4 x 6 inches, its actual dimension will be 1 x 5½ inches.

The nominal dimension of a wooden board 2 x 4 inches will also have an actual dimension of 1½ x 3½ inches. A wood decking with a nominal dimension of 2 x 8 inches will also have an actual dimension of 1½ x 7½ inches.

The length of composite decking boards comes in 6′, 12′, 16′ and up to 20′. The width of the composite board also varies and can range from 1 to 2 inches thick and 4 to 6 inches wide.


The lengths of the decking boards vary. Composite board length varies from 6ft, 12ft, 16ft  to 20ft. While the length of wood deckings also varies, there are different board sizes to choose from if you want to build a deck.

Is Composite Decking Cheaper than Concrete Paving?

M. John

Before examining whether ultradecking composite is cheaper than concrete paving, it is important to understand each of them. Building a composite decking or concrete paving in your home is an excellent way to use your outdoor space. A decking or concrete paving can serve as a spot where you can entertain your family and friends. While decking and paving can be a good addition to your home, you have to know things about them before installing them.

You should know the cost to purchase composite decking and the cost of installation versus the cost of concrete paving. Knowing this will help you choose what type will best suit your budget. Composite decking is more expensive to build than other decking types like wood decking. But what of concrete paving? Is composite decking cheaper than concrete paving?

cheap composite decking brand

Wood-plastic decking can be quite more expensive than concrete paving. But when you consider the advantages of composite decking, you will discover that the cost is worth it. Wood-plastic decking is exceptionally durable and resistant to the elements. It does not absorb water or moisture, nor can it crack. It can last for 25 years and more and still look very appealing.

Composite decking provides a completely different style, aesthetics and feel when compared to concrete paving. When building a deck outdoors it is often considered an extension to your home. The overall look and finish are more natural as your new composite decking area will offer a more homely warmth and feel in a comfortable and luxurious setting.

Additionally, composite decking requires less maintenance. Maintaining composite decking is extremely easy, unlike wood decking, which requires a great deal of maintenance almost every year. Composite decking requires simple cleaning with hot soapy water and a soft-bristle brush.

What is Concrete Paving?

Paving is a hard flooring material that you can make with stones, bricks, or concrete. A concrete paver is a popular outdoor flooring option if you don’t want to install decking. Concrete paving is not as expensive as composite decking and is a good choice if you want a cheaper flooring option. The paving also comes in different patterns and sizes to suit all needs.

Apart from that, paving is also offered in a variety of colours. Installing concrete paving is easy, but still requires the preparation of your outdoor space. It is not like composite decking that you can install on both a levelled and rough surface. Concrete paving is suitable for a flat surface area. You can install a concrete paver on your walkway, driveway, or patio.

Is Composite Decking Cheaper than Concrete Paving?

Simply put when it comes to cost, concrete paving is generally cheaper than composite decking. If you plan to sell your property in the future, it can be a good idea to consider the Return Of Investment (ROI) for composite decking compared to concrete paving. Composite decking has a higher ROI when compared to concrete paving. Even though it is more expensive than concrete paving, composite is worth it. It won’t rot, crack or splinter and is easy to maintain with a higher ROI than concrete paving.


Composite decking is not cheaper than concrete paving.

How to Waterproof Under Composite Decking Boards

M. John

Taking the time and effort to add waterproofing to the substructure and frame of your composite decking area will extend its service life.

The spaces between your ultra decking allow for easy water drainage on the decking. It allows water to drip, thereby keeping the decking dry. But, the decking may not be suitable if you want to do anything under the composite boards. To keep underneath your decking dry, you have to prevent water from dripping through the spaces. How can you waterproof under composite decking boards?

Why You Should Waterproof Under Composite Decking Boards

Waterproofing under composite decking boards can prolong the lifespan of the decking joists. The gaps left between the composite decking allow the easy drainage of water from the decking.

Ground level composite decking
It can be very useful to take the extra effort to waterproof your decking

This water can drip on the wooden decking joists, and when this repeatedly happens over the years, it might weaken the joists. When you waterproof under the composite decking, the area beneath the deck will be dry. It will keep the joist from absorbing water as well as lengthen its lifespan.

Additionally, when the underside of the decking is dry, you can use the area beneath the decking for other things. You can use the underneath of your decking for storage or other activities.

Ways to Waterproof Under Composite Decking Boards

Composite Decking Flanges

First, you can waterproof under composite decking boards by using flanges. The gaps between the composite decking allow water to flow easily. To waterproof the underside of the composite board, use rubber flanges to fill the gaps. Applying flanges on the spaces between the decking will keep water from dripping under the composite decking boards. Some flanges are designed to serve as a mini waterway to flow toward the decking edges.

Under Deck Ceilings System 

A second way to waterproof under composite decking is by attaching a ceiling system beneath the decking. The ceiling keeps the underside of the decking dry by drawing water away from the decking. These ceiling systems often use vinyl or aluminium panels to dispose of the water that seeps through the decking gaps. The water is channelled away, thereby keeping the underside of the decking dry.

The drawback of under decking ceiling systems is that it can damage the wooden joist. It allows water to drip over the decking joist, which can weaken the joist. The joist will rot or decay over time since it’s exposed to water. Apart from that, the under-decking ceiling system prevents air from getting beneath the decking. It can trap moisture, thereby preventing air from drying the wet joist.

Interlocking decking systems

The interlocking decking system is another way to make your decking waterproof. Some of these systems have in-built water troughs that keep water away from the decking. When using the interlocking decking system, ensure that there is no gap between the system and the house. A gap between the system and the house can leave room for water damage.

Under-deck drainage systems

Furthermore, you can waterproof under composite decking with the under-decking drainage systems. The under-decking drainage consists of a method in which a waterproof gutter system is installed below the composite decking. It is usually done during the installation of the composite decking. The gutter system is installed above the decking joist and is designed to divert water away from the decking joists and beams. This prevents wooden joists from absorbing water or moisture while keeping the underside of the decking dry.

Roof Deck Sleepers

Lastly, you can waterproof under composite decking by making use of deck sleepers. Deck sleepers will raise the decking above the ground to keep water from beneath the decking. You can use a piece of wood to lift the decking from the ground. The wood should be waterproof so that it won’t decay over time. Additionally, this method allows air beneath the decking and thus keeps the decking away from water. You should also avoid using chemically-treated sleepers to raise the decking as it may not be suitable for use in residential areas.

Damp Proof Course

Many of the professional decking installers and landscape gardeners that regularly purchase Ultra Decking composite decking boards will place damp proof course (DPC) tape on to the top and bottom of the joists. Any water dripping through the decking board gaps simply bounces off the DPC tape preventing any water from penetrating the joists. In addition, some professional installers go further and source a colour match paint or sealant similar to the decking colour and add an extra layer of water protection over the top of the DPC tape.

Can You Submerge Composite Decking in Water?

Can You Submerge Composite Decking in Water? No. Ultra-Decking composite boards should not be fully immersed underwater. Ultra-Decking composite boards are water-resistant materials. Since composite decking can resist water, most people think that composite decking is also waterproof. There is a clear distinction between a water-resistant material and a waterproof material. You can build a composite decking in regions with high levels of moisture. Some homeowners even install composite decking close to their swimming pools or hot tubs because of its water-resistant abilities.

Since composite decking is water-resistant, can you submerge composite decking in water? No. Composite decking is exceptionally durable and resistant to the elements. It is also resistant to water and moisture. Composite decking can survive in a moist environment. A capped composite decking will not swell or absorb water if you install it in a moist area. The plastic material in the composite decking gives it the ability to resist water. Water cannot easily penetrate a water-resistant material, but it can still absorb water when completely immersed in water.
You cannot submerge composite decking in water. Submerged means complete immersion of the composite board in the water. A composite board can only repel water but will absorb water if you place it inside water.

Why Composite Decking Boards Are Waterproof

When choosing decking materials, you have a few options that you can choose. One of the most well-known selling factors of Ultra Decking composite boards is their waterproofing. Unlike wood, composite decking has better water resistance, along with the issues related to moisture. But the question is, what makes composite decking boards waterproof? And why should you choose waterproof materials?

It is Part Plastic

One of the main reasons why composite decking materials are waterproof is because of their design and makeup. Composites, also known as WPC or wood-plastic composites, are materials made from both thermoplastics and wood fibres. People mistakenly group it with PVC, but vinyl decking is pure plastic without any wood parts. The process to produce composites involves extruding the components, melting them and forcing them to shape into decking boards.
Because of the melted and mixed wood and plastic, it no longer absorbs as much moisture, making it water and moisture-proof. WPC no longer experiences many issues associated with wood use, such as mould growth and rotting. Another problem with wood decking is warping due to moisture absorptions. While composites can still bend, it is not because of moisture and humidity. Instead, composites and other synthetic materials undergo thermal expansion.

2nd Generation Composite Decking is Capped/Shielded

Another feature that makes composite decking waterproof is because of its capping. Capping is exterior layers of thermoplastics, such as PVC, polyethene, or polyurethane, present in almost all new 2nd generation composite decking boards. While uncapped boards are waterproof by themselves, capped composites further protect the decking from problems aside from moisture.
If water and moisture are an issue, you will want to use capped composites over uncapped ones. However, there are various types of capped decking, according to how many sides have exterior capping. Most of the boards today either have three or four sides covered. Each one has its advantages and disadvantages. But the question is, which one is more waterproof?

Full-Capping – Full-sided capping has a polymer exterior on its four sides. Because of this, it has superior protection against moisture absorption. Composites with full capping are also reversible. Because of this, not only do they look beautiful on outdoor decks but above ground level floor decking as well. However, there are a few reports of swelling on the exposed ends on some low-quality boards. Since the board is fully coated, there are no other places for water to drain other than the ends. Full-capped composites are also generally more expensive.

Three-Sided Capping – Aside from fully-capped, there is also three-sided capping for composites. As far as durability goes, it is also resistant to water and moisture. But compared to full-sided capped composites, they can be slightly more prone to moisture absorption. However, since the underside of the boards is uncapped, it has better water drainage and is less prone to swelling due to moisture. They are also often cheaper than four-sided capped composites.

Why Choose Composite Decking?

When building decking, there are many reasons why you should go with composites. Many use it for its superior waterproofing. As mentioned, water can cause various problems with traditional decking materials. Wood is an excellent example of a material that can have issues regarding moisture. When exposed to moisture, it can warp, grow moulds, and rot. Composite decking is less likely to have these problems. Because of this, they are the superior choice if you want waterproof decking.
Another reason composites hold better than any other materials when it comes to moisture is that it is easier to maintain. Composite decking requires less effort and time to clean. Even if the water is stuck on the deck for a long time, it will just evaporate or drain. As for wood, you will have to dry it as soon as possible. Naturally, you still want to dry any spills on your decking as much as possible, whether it is wood or composite.
Another advantage of composite is that it does not need painting or sealing for it to be resistant to moisture. Because of this, you do not have to spend money on buying these products. The truth is, you can save more money when choosing composite decking due to its water resistance and low maintenance. A wooden deck may prove to be more expensive, especially with regular sealing, painting, and staining.


Can you submerge composite decking in water? The response to the question is No. Composite decking can repel rainwater that falls on it. When you submerged composite decking in water, it will absorb water. Although the capped composite board has high water resistance, it will still absorb water in a minimal amount if you submerged it in water.

You can waterproof under a composite decking board with the use of an under-decking drainage system, decking flanges, decking sleepers and interlocking systems.

Reasons Why Composite Deck Can Warp

M. John

Installing ultra decking in your outdoor space can make your home visually appealing. Composite decking has many benefits over wood, one of these many advantages is no warping, but does this mean composite decking will never warp?. The short answer is yes composite decking in some rare cases has warped, this is due to expansion and incorrect installation. We will explore why you may read about some people still complain that their composite decking warps. Can this be true? If so, what are the reasons why composite decking warps?

What Causes Warping in Deckings

Reasons Why Composite Deck Can Warp

Heat can cause a deck to warp. When there are temperature changes, it causes the decking to warp. Warping occurs when the decking’s surface is exposed to sunlight. The decking becomes hot and starts to distort gradually.  It happens during thermal expansion when the decking absorbs heat from the sun and expands.

The heat from the sun causes the decking to be flexible. And when it eventually cools, the decking shape will be distorted. It will not look the way it was before the thermal expansion of the decking occurs. The decking will be left distorted because of the heat. The board won’t be as straight as it was before it warped. What about composite decking? Can it warp too?

Will Composite Deck Warp?

Composite decking consists of wood and plastic material. It differs from natural wood decking. Composite decking is a synthetic decking material. It is known for its high durability compared to wood and plastic decking. Like other decking types, composite decking can also absorb heat when exposed to the sun. When this happens, composite decking becomes hot and flexible.

However, composite decking will expand when it becomes hot and flexible. The composite decking will not shrink like wood decking but will only expand. When composite decking expands, it will not warp like timber decking. Warping of composite decking can only occur if it is not installed in the right way. What are the reasons for a composite board warp?

Reasons Why Composite Decking Can Warp

The reason why wood-plastic decking can warp is if it expands and touches a fixed surface. It can happen if the composite board touches a wall. If the board touches the wall, it will make the boards too close to each other. The composite boards won’t be able to go further. It is what causes the composite decking to warp.

Apart from that, the tightness can also make the decking shift from its original position. When the composite boards shift from their original position, they will be removed from the joist. Can you prevent composite decking from warping?

How to Prevent Warping in Composite Decking

The way you install your composite decking will determine whether it will warp or not. Composite decking will not warp like wood decking, given that you follow accurate guidelines during installation. There is a change in temperature that causes composite decking to expand. Composite boards are designed to resist the elements which can cause them to warp.

Zero warp composite deck
Quality composite decks offer resistance to warping; they shine.

Warping of the composite decking will only occur if there is no spacing between the boards. When installing composite decking, ensure that the decking is appropriately spaced to allow it to expand freely. The gaps between the boards will prevent it from being tightly close to each other when it expands. When there is space between the composite board, the board will expand freely without warping.

To prevent warping, ensure the decking is fixed by a composite decking professional. The decking expert will leave gaps between the decking to allow for expansion. When installing composite decking, experts recommend leaving a space of 5 mm between the composite decking boards. In addition, a space of 15 mm is also recommended between composite decking and a wall.


The reason why the composite decking can warp is if there is no space between the composite board. Deck experts recommend that there should be a gap of at least 5 mm between the deckings.

Is Composite Decking Safe for Garden Beds?

M. John

Ultradecking composite is the best building material you can use in making decks. Apart from deck building, you can also use composite decking to make other things. Some even use composite decking to make garden beds. Is composite decking safe for garden beds?

composite deck for garden bed

What Make Composite Decking Safe For Garden Beds

Free From Harmful Chemicals

Composite decking is safe for garden beds because it does not contain harmful chemicals. The decking manufacturers created composite decking with materials that are safe to man and his environment. These materials include wood fibres and recycled plastic materials; they are non-toxic substances.

And also,during the co-extrusion process of manufacturing the wood-plastic decking, the manufacturers did not use dangerous chemicals. Since the decking makers make WPC with non-toxic materials, the composite decking is safe for use. You can use it to make your garden bed without any fear of harmful chemicals.

Eco Friendly

Secondly, composite decking is suitable for making garden beds because it is eco friendly. It is not a land pollutant that can pose a threat to your flowering or edible plants. You can use composite decking to make garden beds for growing vegetables because it is a safe building material.

WPC is also regarded as environmentally friendly because it is not toxic to the environment. It can not affect the soil as well as your plants or flowers. It is the best building material you can use in constructing a raised garden bed on your lawn.

Consist of Wood Fibres and Recycled Plastic Material

Besides being eco friendly, composite decking is perfect for making lawn beds because of its composition. Decking manufacturers made wood-plastic decking with materials that are not harmful to man and its surroundings. The materials decking makers used in making WPC consist of wood fibres and recycled plastic materials. These materials are free from toxic chemicals and are safe for making garden beds.

Resistant to Rot

Additionally, another reason composite decking is safe for garden beds is that it is resistant to rot. Unlike wooden planters, composite decking can not rot or decay if you use it in making your lawn bed. Water or moisture can damage building materials, especially metal or wooden materials. Unlike wooden and metal building materials, composite decking is resistant to moisture or dampness.

The composite decking makers sealed the decking material so that it can never get damaged by water or moisture. If you use it in making a garden bed, you won’t have to replace composite decking since it is not susceptible to damage.

Resistant to Insects

Besides being resistant to rot, composite deckings are also resistant to wood-eating insects like termites. Termites can damage wooden planters but can never penetrate wood-plastic decking. If you use composite decking to build your garden bed, termites will never eat it. You won’t need to replace a composite decking garden bed annually if you use wood-plastic composite in making it.

Does Not Leach Chemicals Into the soil

Lastly, composite decking is considered safe for garden beds because it does not leach chemicals into the ground. Unlike pressure-treated wood that leach harmful chemicals into the soil, composite decking can not leach chemicals into the soil.

Wood-plastic decking can not crack, burst or warp. It is a perfect building material you can use in making a lawn bed. It makes plants safe for consumption because it does not leach chemicals into the soil. You can grow your vegetables inside a composite garden bed without fear of chemicals getting into the soil.

Is Composite Decking Safe For Garden Beds

Composite decking is safe for making garden beds. It is the best building material you can use on your lawn because it is environmentally friendly. You can use composite decking to make a raised lawn bed for growing vegetables. Composite decking lawn beds are easy to construct. You can build them yourself by attaching the composite decking boards with screws. You can also purchase composite decking planter kits and assemble it on your own without using any tools.


Is composite decking safe for garden beds? The answer is Yes. Composite decking is safe for building lawn beds because it is eco friendly and does not contain harmful chemicals.