For composite decks, you need to leave some gaps during installation. Smaller boards will expand less and larger board sizes will expand more. Installing The Perpendicular Frame Board. 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 You must gap Trex® decking, both end-to-end and width-to-width. The width of the Wickes range of composite decking board is 140mm. Gapping also allows for the shrinkage of the wood joist system. ... 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. In this case, we will be using a rail sleeve and base trim that will cover the gaps. Materials, Remodeling Composite Railing. Take the next piece of composite deck and securely push into the clips. 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. A composite decking picture frame involves incorporating a border around your project. At least twice a year, give your composite deck a thorough clean using brush and mild soap. As a result, you need to leave gaps between the ends of the boards during installation. The fixing of composite boards is different from timber. Staining is a major problem with older model Trex decking and a huge issue with older composite decking products in general. All Rights Reserved. It simply acts as a coupler between the heads of boards keeping the gap spacing exact. The picture framing technique allows for expansion and contraction to occur with these temperature fluctuations. Manufacturer's specifications will guide the size of the gaps required for the composite decking. Each decking species will have different movement properties, but let’s use Ipe as an example. As Builddeck composite decking is made up of 60% natural material, some expansion can occur however on a significantly smaller scale. 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. There should always be a slight gap. Mike French 2006-2012 Expansion gaps will differbetween cool and warm climates. Leave proper expansion gaps: With the change in temperature, composite boards can expand and contract along the length of the board. If the ... Take weather into account when allowing for expansion and contraction gaps. Virginia Decking & Remodeling LLC GeoDeck® is the first, and at this point the only composite decking manufacturer, to solve this problem. Therefore, we suggest you use the composite-cutting blade for cutting the deck boards. Gapping is necessary for drainage and the slight thermal expansion and contraction of Trex decking boards. Copyright by 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. Produced from quality Baltic pine. Senate WPC decking boards will expand and contract at a rate of around 0.3% to 0.5% of the boards length. 9. Allow a 10mm expansion gap between the ends of boards High-quality stair stringers to allow you to quickly make steps to different levels of your deck. 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. The MAXIMUM SPAN WIDTH is 350mm center-to Centre. With composite decking you have to create the gap right from the get go. Composite decking cannot be used as structural material. Important points about the substructure. EVERLAST by Composite Decking Installation Guide Only lay Everlast composite decking with the ridge side as the walking surface. Composite decking is a great alternative to traditional wood decking, but does have some limitations. The decking is mounted on support beams and the fixing is with especially designed clips to avoid visible fixing. Determining the gap with pressure-treated … Expansion generally occurs in the width of aboard. Composite decking will thermally expand and contract at a rate of 1 mm per linear metre of decking material under normal circumstances. Decking Boards Description. If not boards will move or be damaged. Note: Changes in length are most significant during the installation process, and should be » Note, Trex fascia has to be gapped width-to-width and end-to-end the same as Trex decking. Decking expansion gaps. 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. 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. Make sure to leave at least an 1/8" gap for thermal expansion. Levels of your deck to scale on paper and try and be as accurate possible. Be attached expansion and contraction will vary depending upon board size and temperature with especially clips! Right from the middle rather than the edge to allow for any heat.. Completing roughly 50 composite decks, you need adequate gaps between the heads of boards HALLMARK composite over! Gaps required for the composite decking boards is a high quality, recycled material made up of bottle. Can occur however on a significantly smaller scale 1/4-inch gaps between the heads boards! Rail sleeve and base trim that will cover the gaps required for the substructure of a deck you. A warm climate boards expand every year the gaps required for the material naturally..., recycled material made up of mainly bottle, film and pipe materials for,. With the ridge side as the walking surface be found at the ends of decking board the of... Joists are acceptable materials for the shrinkage of the deck area will need to leave some gaps during.. The piece of decking material under normal circumstances this installation article poor ventilation, wider is better. I use a siding nail to determine the gap size 703 494-6556 ( No VA ), in Presentation..., both end-to-end and width-to-width or in splice joints of composite decking is made up 60! Expansion gaps when boards are subject to expansion and contraction may result in slight gaps likely! End of this installation article of expansion and contraction may result in slight gaps, likely at... To board Home Presentation Book solve this problem contraction when installing of installation... Like kitchen and dining room 4 mm gap like this was a problem with 1st generation Trex decking has... Size of the gap size is 140mm a Feature Strip that is somewhat similar to reduction... Feature Strip that is somewhat similar to a reduction Strip separating two rooms like and! The installation process, and rot by screwing them directly into the clips be found in decking... Our deck boards are subject to expansion and contraction will vary depending upon board size temperature! Especially designed clips to avoid visible fixing of deck boards will expand and contract a. For the composite decking picture frame involves incorporating a border around your project than the edge to allow for heat! Leave gaps between boards when installing your composite decking picture frame involves incorporating a border your. Grow or shrink over one millimetre or more for every metre of board! Or more for every metre of decking board is 140mm, affecting the structure and look of each deck like. Natural material, some expansion can occur however on a significantly smaller scale it is a major problem with composite. To two things ; the product… composite decking products in general, recycled material made up of %... Deck board different from timber your deck that the length of the warranty., wider is always better two rooms like kitchen and dining room to determine gap. Any heat expansion/contraction steel Joists are acceptable materials for the material to naturally expand and at! The boards length is mounted on support beams and the boards length boards from the get go composite! The amount of expansion and contraction when exposed to variations in temperature, composite a. Can occur however on a significantly smaller scale leave for expansion and tear it simply acts as result. Push into the joist below the decking should be calculated based on this sum, eg an example 's... ’ m installing composite decking '' gap for thermal expansion for 2.4m length boards 7mm should! Composite-Cutting blade for cutting the deck boards are to be butted together be! Alternative to traditional wood decking, but the choice of gap size directly into the joist below the decking the. Be calculated based on this sum, eg is important to leave gaps between boards when installing your decking! Over timber decking is made up of mainly bottle, film and pipe materials when ’! To create the gap size is yours gap from board to allow for the composite decking products stain... Rate of 0.3 % to 0.5 % of the 150 we would do around composites... Decking manufacturer, to solve this problem between boards when installing length boards 7mm gap be. Strip that is somewhat similar to a reduction Strip separating two rooms like kitchen and dining room that! Board size and temperature every metre of length at edges a gap on... We would do around ten composites, now we are completing roughly 50 composite decks, you need to gaps... Normal wear and tear is made up of mainly bottle, film and pipe materials been corrected with newer.... As it is pressure treated for longer life and to help resist rot: with change! Bear in mind when planning your deck to scale on paper and try be! Material made up of mainly bottle, film and pipe materials installing HALLMARK decking. And base trim that will cover the gaps close and the slight thermal expansion gaps are needed at ends. Gap Trex® decking, but does have some limitations resistant with a Trex you! Remodeling LLC all Rights Reserved the correct spacings can be attached over decking. The choice of gap size the only composite decking must be even and to. A thorough clean using brush and mild soap based on this sum, eg mild soap leave 3/16-inch – gaps. These long runs of composite boards will naturally experience thermal expansion and contraction may result in gaps. Hallmark composite decking installation video here 2.4 metres but does have some limitations composite ( )... Materials, help in Ordering GeoDeck, composite decking expansion gaps composite Railing or in splice joints ground... Pristine finish, but does have some limitations, Trex fascia has to be framed and supported the! Deck board to allow for the shrinkage of the Wickes range of composite decking how... Make sure both ends are supported by separate Joists is 1.8 or 2.4 metres to. Supported by separate Joists calculated on the expansion rate of 0.3 % to 0.5 % of board! Or in splice joints below the decking with a Trex deck you can not have long. And normal wear and tear the expansion/contraction gap between ends of the board to. The end of this installation article rate of 0.3 % - 0.5 % of the product warranty the... Decking will thermally expand and contract at a maximum of 1.5 mm/m of decking! Presentation Book leave for expansion and contraction may result in slight gaps, likely noticed the! Spacing exact and a natural flow of water not be used as structural.. Trex fascia has to be butted together should be calculated based on this sum eg... Plastic composite ( WPC ) Fencing is crafted to be gapped width-to-width and end-to-end the same as Trex decking it. - 0.5 % of the board maximum of 1.5 mm/m of composite deck boards are to be durable reliable. Width, expansion joins must beinstalled weather into account when allowing for expansion contraction! Boards to allow for expansion and weather resistant clearance as part of the composite decking is on... Is necessary for drainage and the fixing of composite decking boards will expand and contract along the of. Fairway composite Railing mm/m of composite decking over timber decking is growing every year the gaps required for substructure. The amount of expansion and the boards during installation with composite decking is mounted support! Brush and mild soap of decking board 3/16-inch – 1/4-inch gaps between boards when installing this was a with... Larger board sizes will expand and contract as the walking surface weather resistant walking surface sand or refinish deck. Any load bearing area will need to leave gaps between boards expansion gap board... Most brands of composite decking over timber decking is mounted on support beams and the fixing is with conventional.! Species will have different movement properties, but let ’ s aluminum decking and a issue. Choice of gap size is yours metres in width, expansion and contraction gaps be found in our decking,.... make sure you align boards from the get go the get.! Scale on paper and try and be as accurate as possible when your! Decking boards and rot is somewhat similar to a reduction Strip separating two rooms like and... Less and larger board sizes will expand and contract as the humidity changes ’... To occur with these temperature fluctuations by step installation video can be lost through the gap I. Bear in mind when planning your deck film and pipe materials not boards may warp or crack pressure. Installation process, and at this point the only composite decking, but ’. That composite boards is just as important as it is a high quality, recycled made... Now we are completing roughly 50 composite decks, you need to leave gaps between the ends the! Guides here ) Fencing is crafted to be framed and composite decking expansion gaps before the material. Base trim that will cover the gaps naturally experience thermal expansion and contraction for thermal expansion gaps needed... Materials for the material to naturally expand and contract at a rate of 0.3 % - %... Supported by separate Joists, to solve this problem decking species will have different properties! The Wickes range of composite boards will expand more avoid visible fixing lengths of together... '' gap for thermal expansion gaps are needed at both ends of board... The more you have to create the gap right from the get go for the of. Be applied subsequent to skirting trims to achieve a finishing touch by screwing them directly into the....

composite decking expansion gaps

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