» Note, Trex fascia has to be gapped width-to-width and end-to-end the same as Trex decking. It’s made to use as a water tight deck above patios or other decks but we used it everywhere including our front porch. As a result, you need to leave gaps between the ends of the boards during installation. reports and reports to ICC-ES standards. The locking clips serve to fasten the deck boards to the joist to prevent movement, whereas the T Clips allow expansion and contraction of the deck boards. The tight, compact growth rings, that are a feature of wood grown in northern countries, provide a stable deck board to work with. Its advisable to leave a minimum gap of 8mm between any composite skirting trim and the ends of composite decking boards to allow for expansion, expansion can happen with temperature variations. Decking must be fixed to composite joists if installed over a flat solid sub surface. Push the next board in place. The Wood Plastic Composite (WPC) Fencing is crafted to be durable, reliable, and weather resistant. Leave a gap calculated on the expansion rate of 0.3% - 0.5% of the board length to allow for expansion. I put this down to two things; The product… ... Top selling high-quality deckboard that is made from slow-grown premium European Pine enabling you to build attractive decking that can extend your home into your garden, or give you a tranquil hideaway. ... Where boards meet at corners of the picture frame, a 45-degree mitred edge should be made and an expansion gap of 4mm must be observed. Additional Installation Information Expansion Space in Extreme Climates Expansion space: Bamboo Composite products expansion rate vary from 0.2% to 0.4% depending on the length of the planks as well as the climate it will be installed in. 6. 35 For composite decks, you need to leave some gaps during installation. It simply acts as a coupler between the heads of boards keeping the gap spacing exact. Temperature changes cause composite boards to expand and contract along the length of board. It’s aluminum decking and it’s far superior to composite decking. It is essential to leave gaps between your composite decking boards to allow for both adequate drainage and any expansion in hot weather. Make sure to leave at least an 1/8" gap for thermal expansion. Install the decking with a … We lay around 150 decks per year. What is composite decking made of? 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 deforming as the temperatures fluctuate. This allows for contraction, expansion and a natural flow of water. Take the next piece of composite deck and securely push into the clips. 6. Composite decking will thermally expand and contract at a rate of 1 mm per linear metre of decking material under normal circumstances. Expansion and contraction are most significant where extreme temperature ... Gap (in) 23 1/16 3/16 4/16 4/16 5/16 5/16 6/16 7/16 7/16 ... make sure you align boards from the middle rather than the edge to allow for expansion of boards. The size of the gaps must be even and consistent to give a pristine finish, but the choice of gap size is yours. As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. Therefore, we suggest you use the composite-cutting blade for cutting the deck boards. GeoDeck If joining 2 lengths of board together, make sure both ends are supported by separate Joists. If the ... Take weather into account when allowing for expansion and contraction gaps. 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. The composite decking must not be laid directly on the sub-floor. Trex Transcend Composite Decking - How To Install. Repeat until your deck is the required length. 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 If joining 2 lengths of board together, make sure both ends are supported by separate Joists. Click & Collect or delivery options are available. It is known that composite boards do suffer expansion/contraction changes according to the weather, affecting the structure and look of each deck! 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Composite Railing. UltraShield decking products are designed to protect against mold, fading, moisture and mildew.See our simple composite decking installation video here. Composite decking cannot be used as structural material. Full details are available upon request. Staining is a major problem with older model Trex decking and a huge issue with older composite decking products in general. 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. Additionally, by leaving the correct expansion gaps as detailed within our full installation guide, any fluctuation can be pre-empted, avoiding possible future warping. There should always be a slight gap. 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. How much gap should I leave for expansion or contraction when installing? Note: Changes in length are most significant during the installation process, and should be Expansion gaps are needed at both ends of each board to allow for the material to naturally expand and contract without any issue. Push the next board in place. Full step by step installation video can be found at the end of this installation article. Composite The polyethylene used in our decking boards is a high quality, recycled material made up of mainly bottle, film and pipe materials. The picture framing technique allows for expansion and contraction to occur with these temperature fluctuations. Timber, composite, aluminium or steel joists are acceptable materials for the substructure of a deck. Leave at least a 1/8″ gap between composite boards. Blacking like this was a problem with 1st generation Trex decking that has been corrected with newer models. Wood Composite deck boards are subject to expansion and contraction when exposed to variations in temperature. Staining Problems With Trex Decking. Leave expansion gaps. That’s why the board ends should never be installed tight against one another. Remember to factor all necessary expansion gaps into your plans. Our deck boards are made from high quality, slow-grown European Redwood Pine. 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 deforming as the temperatures fluctuate. Magazine Features Virginia Decking, ICC-ES In this case, we will be using a rail sleeve and base trim that will cover the gaps. Gapping also allows for the shrinkage of the wood joist system. As Builddeck composite decking is made up of 60% natural material, some expansion can occur however on a significantly smaller scale. Decking Materials, Help As Builddeck composite decking is made up of 60% natural material, some expansion can occur however on a significantly smaller scale. The size of the expansion gap … Do not leave more than 50cm between the beams and respect the following expansion gaps : 5mm in width, 5mm per running meter in length with a minimum of 15mm between a board and a wall. Leave proper expansion gaps: With the change in temperature, composite boards can expand and contract along the length of the board. This means that any load bearing area will need to be framed and supported before the composite material can be attached. 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. Recall Old News: How Check the product's end-gap … Installing composite decking can’t be done like wood decking where you can slam it tight together when it’s still green and then shrinks as it dries. Expansion gaps explained Deck boards are laid with a gap between each individual one - both along their length and their ends. The use of composite decking over timber decking is growing every year here in Sydney, Australia. Note: To allow for expansion and maintenance, please be sure to keep a 30mm expansion gaps between all sides of your deck and any obstructions such as walls, fences, etc. A composite decking picture frame involves incorporating a border around your project. The outer gaps must be a minimum of 8mm from … High-quality stair stringers to allow you to quickly make steps to different levels of your deck. Determining the gap with pressure-treated … For composite decks, you need to leave some gaps during installation. 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. Allow a 10mm expansion gap between the ends of boards 6mm for 4m . The fixing of composite boards is different from timber. Corner trims can be applied subsequent to skirting trims to achieve a finishing touch by screwing them directly into the joist below the decking.. Due to the plastic content, Composite materials expand and contract along their length due to changes in temperature, therefore adequate expansion gaps are needed between the ends of each board. in Ordering GeoDeck, Fairway All Rights Reserved. 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. Typically, leave 3/16-inch – 1/4-inch gaps between boards. 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. 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 weather. during the winter my boards expand every year the gaps close and the boards buckle. That constant movement can leave unsightly gaps. It is important to leave gaps between boards when installing your composite decking, but the size of the gap you choose can vary. At least twice a year, give your composite deck a thorough clean using brush and mild soap. Important points about the substructure. Copyright by Expansion gaps will differbetween cool and warm climates. Composite decking will thermally expand and contract at a rate of 1 mm per linear metre of decking material under normal circumstances. DuraLife composite decking products are stain and fade resistant with a co-extruded polypropylene outer shell that resists everyday spills and normal wear and tear. If stored outdoors the decking should be kept in a covered area to prevent exposure to direct sunlight and weathering.