Also, resistant to mold, mildew, and rot. Also, composite decking expansion depends on the materials that the decks are made of. Must have header joint expansion Use starter clips Finishing slip Expansion gaps “We recommend that you use a qualified and compe-tent deck installer who is familiar with the workings of decking and outdoor pro-ducts that are exposed to the elements” 1 plank It will add beauty to your outdoor space and provides plenty of privacy. Nominal 2" thick boards require a minimum #8 - 3" … In order to prevent buckling of the deck during the wet season, you need adequate gaps between the boards. A composite decking is a strong and durable building material that is used to make decks. Senate WPC decking boards will expand and contract at a rate of around 0.3% to 0.5% of the boards length. The installation process of composite decks is easy because you can choose between the surface installation and the hidden installation. It is essential to leave gaps between your composite decking boards to allow for both adequate drainage and any expansion in hot weather. That’s why the board ends should never be installed tight against one another. Click & Collect or delivery options are available. When this happens, the dark-colored composite decking will expand more than the light-colored composite decking. for 2.4m length boards 7mm gap should be left when butting. Leave proper expansion gaps: With the change in temperature, composite boards can expand and contract along the length of the board. So, when you are laying your composite decks on the joists, you must make sure that you leave at least 5mm space between the composite decks. In cooler climates, some composite boards expand at approximately 0.75 mm/m of a composite deck board. Expansion gaps … You have to leave a space between the composite decks. Push the next board in place. That will depend upon air temperature at the time of installation (Read this to learn more). The width of the Wickes range of composite decking … The size of the gaps must be even and consistent to give a pristine finish, but the choice of gap size is yours. Each decking species will have different movement properties, but let’s use Ipe as an example. As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. It is important to leave gaps between boards when installing your composite decking, but the size of the gap you choose can vary. How Do I Replace My Wood with Composite Decking? Additionally, by leaving the correct expansion gaps as detailed within our full installation guide, any fluctuation can be pre-empted, avoiding possible future warping. Not sure of the type of composite decking or the colour you want? INITIAL HINTS AND TIPS FOR INSTALLING HALLMARK COMPOSITE DECKING 7. Dark brown composite decks, for example, will absorb heat than light brown composite decks. The accounts of issues are repeated with a frightening regularity and sameness throughout the threads of complaints. When using WOOD/COMPOSITE SCREWS, nominal 1" thick boards require a minimum #8 - 2 1/2" or longer screw for fastening. Composite materials that use sawdust or wood fibers in the core are subject to expansion and contraction due to changes in moisture content, which is typically seasonal. Note: To allow for expansion and maintenance, please be sure to keep a 30mm expansion gaps between all sides of your deck and … High temperature makes the composite deck expand along its length and width. As Builddeck composite decking is made up of 60% natural material, some expansion can occur however on a significantly smaller scale. For areas that are subject to significant temperature swings, we recommend installing your deck boards using surface fasteners. The color of your composite decking matters because it affects how your deck expands. Take the next piece of composite deck and securely push into the clips. Providing expansion gaps allows proper drainage and ventilation to the sub base which prevents the timber from rotting. Composite decking has 60% timber content to prevent damage. The polyethylene used in our decking boards is a high quality, … What Are the Different Methods Of Installing Composite Decking? Homeowners prefer composite decks because of the ease that comes with maintaining them. There should always be a slight gap. Fasten your deck boards as … When installing composite decks, there are procedures that you must follow to make the process simple and to stick to best practice. Gapping is necessary for drainage and the slight thermal expansion and contraction of Trex decking boards. Full details are available upon request. Different makers of composite decks will provide various instructions on how to install your deck and the right amount of space that you should leave. Because with a Trex deck you can’t sand or refinish … If stored outdoors the decking should be kept in a covered area to prevent exposure to direct sunlight and weathering. Full step by step installation video can be found at the end of this installation article. There are a multitude of problems with composite decking that show up all too often to be just a stray issue for a hard to please homeowner. The amount of space required depends on how often temperature changes where you live. If joining 2 lengths of board together, make sure both ends are supported by separate Joists. How much of a gap? It is recommended that there should be a 5mm gap between the ends of your composite deck boards. © Copyright 2020 CompositeWarehouse – Composite Decking Supplier. DuraLife composite decking products are uniquely manufactured with a super-strong, co-extruded polypropylene outer shell that forms a “force field” around three sides of the board. The outer gaps must be a minimum of 8mm from anything prohibiting from expanding. Blacking like this was a problem with 1st generation Trex decking that has been corrected with newer models. Why not order our sample pack! EXPANSION GAPS: Like a wood composite decking, ECO BAMBOO COMPOSITE DECKING also expands, although this is less than with polypropylene or polyethylene based decking products. How much of a gap? Expansion gaps explained Deck boards are laid with a gap between each individual one - both along their length and their ends. As long as the space left is big enough for adequate drainage and board expansion in the heat, and the gaps are exactly the same size to give a uniform finish, the gap size is an aesthetic decision. Start by planning your deck to scale on paper and try and be as accurate as possible. Composite decking expansion and contraction, deck board installation technique, butt joints, butt joins, staggered joins, breaker boards ... Trex Composite Decking, ... if you allow gaps between the boards from side-to-side and at the end joints this will allow for thermal expansion and contraction. There are some factors that affect composite decks expansion. Get into the nitty-gritty details of all side-to-side deck board spacing requirements in our official and detailed installation guides for each … Providing expansion gaps allows proper drainage and ventilation to the sub base which prevents the timber from rotting Composite decking should require minimal maintenance over its life, usually a clean-up with a garden hose is sufficient Composite decking will transform your outside living space and give it a real wow factor.It's hard wearing with no need to stain, seal or sand it. I’m using composite decking - will this be okay on a timber subframe? That’s why the board ends should never be installed tight against one another. during the winter my boards expand every year the gaps close and the boards buckle. Notch your composite decking material around rail posts. DOUBLE JOISTING Composite decking is a great alternative to traditional wood decking, but does have some limitations. Composite decking is made from recycled wood and plastics, so no trees are fallen to make the board. What Are the Different Types of Composite Decking? The Wood Plastic Composite (WPC) Fencing is crafted to be durable, reliable, and weather resistant. This is so that when the composite decking expands, the decks will not warp. The next section explains why composite decking expand. These are known as expansion gaps as they allow rainwater to easily run through the decking (rather than pool in an unwanted puddle) and for the deck to expand and contract due to changes in the … 6. Capped polymer and capped composite deck boards, on the other hand, are installed at a minimum 1/8” gap between boards because they won’t shrink from drying like pressure-treated decking. So, it is advised that you leave a space of 5mm between the edges of the decks. As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. One thing about thermal expansion is that it can shift the composite decks from where they are fixed if enough space is not allowed between the decks. First, ensure that the deck boards are aligned properly. Below … This usually occurs in hot regions, and the process is called the thermal expansion of composite decks. Composite decks that are exposed to direct sunlight absorb heat more than decks that are positioned under shade. The fixing of composite … Also, composite decks are more desirable than timber decks and will not wane when they are exposed to the ultraviolet rays of the sun. Remember that composite decks are made with wood and plastics. In this case, we will be using a rail sleeve and base trim that will cover the gaps. The MAXIMUM SPAN WIDTH is 350mm center-to Centre. Everlast decking should be stored flat. This can lead to a situation where the decks will be weakened. Decking Boards Description. The expansion occurs due to 2 reasons. The wood and plastics are then processed in factories and cut into various sizes so that they can be used for building decks. So, when composite decks are exposed to high temperature, they expand at all sides. So, when you are laying your composite decks on the joists, you must make sure that you leave at least 5mm space between the composite decks. It is incredibly strong and is naturally slip resistant and splinter free making it safer for children, visitors and pets. UltraShield decking products are designed to protect against mold, fading, moisture and mildew.See our simple composite decking installation video here. The essence of leaving this space is for the decking to expand and contract when they heat up. Staining Problems With Trex Decking. The gaps between boards are designed for expansion, as composite decking boards are manufactured from a mix of wood and recycled plastics the expansion properties are critical to stop buckling and the deck … This means that any load bearing area will need to be framed and supported before the composite material can be … They are heat, the deck’s color, and the location you place the deck. EXPANSION: Everlast decking boards will expand and contract at a rate of around 0.3% to 0.5% of the boards length. So, you should make sure to check with your composite decks’ maker for advice so that you will know the expansion level of your deck. Decking expansion gaps. The board, when ready, will form one of the strongest deck materials that you can use to build a deck in your house. It is important to understand these reasons, as it directly influences the correct installation of the decking … This is to accommodate composite decking expansion gap. For composite decks, you need to leave some gaps during installation. Leave a gap calculated on the expansion rate of 0.3% - 0.5% of the board length to allow for expansion. It is recommended that there should be a 5mm gap between the ends of your composite deck boards. Repeat until your deck is the required length. Composite decking expand when they are heated or exposed to direct sunlight. This is so that when the composite decking expands, the decks will not warp. What Is Composite Decking Expansion Gaps? Expansion gaps when boards are to be butted together should be calculated based on this sum, eg. You must gap Trex® decking, both end-to-end and width-to-width. So, if you live in an environment that is hot, it is recommended that you choose composite decks that are light-colored. » Note, Trex fascia has to be gapped width-to-width and end-to-end the same as … One of those guidelines is to leave enough space between the composite deck board to accommodate expansion. Our fastener system is designed to act as hidden spacers to effortlessly create equal gaps … How much gap should I leave for expansion or contraction when installing. short of dismantling the deck and staring again, 2 years ago I used a skill saw to open the gaps when they were most swollen this helped … If we install a typical 1×6 Ipe decking board today using our weather conditions of 90% humidity and 96° while assuming the wood is 5.5″ wide, it will maintain that width through the heat and humidity; however, as we draw into … ENVISION Composite Deck Screws and EverGrain Composite Deck Screws are color matched deck screws designed for use with EverGrain and Envision. Gapping also allows for the shrinkage of the wood joist system. Make sure to leave at least an 1/8" gap for thermal expansion. The Problems With Composite Decking. That will depend upon air temperature at the time of installation (Read this to learn more). ... slim objects can be lost through the gap so I opted for a 4 mm gap. Framing for Trex & Composite Decking. UK Composite decking boards are made from a mixture of hardwood fibres (approximately 55%) and high density polyethylene with the addition of certain additives to improve physical, weathering and processing properties. Here are some best practices to keep in mind to allow for expansion and contraction when installing capped composite decking: Always leave 1/8” to 1/4” gap between deck boards during installation. Remember to factor all necessary expansion gaps into your plans. The installation process of composite decks is easy, the dark-colored composite decking will expand more than the light-colored composite decking. Bear in mind when planning your deck that the length of the Wickes range of composite decking boards is 1.8 or 2.4 metres. All Rights Reserved. This is because there is no need for you to sand and oil composite decks to preserve them. When you are installing your deck, you should not allow your composite decking board to meet at both ends. Staining is a major problem with older model Trex decking and a huge issue with older composite decking products in general. Then, install a fastener in the middle of each board length to prevent shifting during thermal expansion and contraction. This makes DuraLife exceptionally resistant to staining and fading compared to older generations of composite decking from … Which Decking Material Is the Best for My Garden. When leaving an expansion gap for each board, compare the current installation temperature (ambient) to what is … If you reside in hot regions that have frequent temperature change, you need to leave a larger gap than you would if you live in a region where the temperature doesn’t expand. This is because dark-colored composite decks absorb heats more than light-colored composite decks. Composite decking cannot be used as structural material. Composite decking boards do not always return to their original positions after expansion and contraction, and therefore sometimes you may see different expansion and contraction gaps occurring within your decking. The plastics in the composite decks make them absorb heat when the decks are exposed to direct sunlight. Composite decking expand because of a change in the temperature of the location they are installed. There should always be a slight gap. 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