how much space to leave between deck boards

Just place the nail in between the boards to ensure you have enough space. When using Trex decking without the grooved edge, a router bit will be needed to create a groove at each joist. If the deck boards are relatively dry, use 16 penny nails to establish the proper gaps between the boards. Answered. 4-6mm for 90mm seemed to be the googled recommendation, so I added 2mm. I was wondering what the recommended space between deck was for 135mm (x19m) Spotted Gum. Q: What size gap between the boards? This will make the decking flush to the edge. Veranda decking, like all wood and composite decking products, requires proper ventilation and drainage in order to ensure its longevity. Spaces will only allow for losing small items that are dropped down the cracks, or getting splinters in your foot. Video of the Day Volume 0% https://www.dropbox.com/s/z z5a5araqtw4gcj/2015-09-19%20 18.54.12.jpg?dl=0 User #16740 1910 posts Joist Spacing for Composite Decking » Maximum allowable perpendicular overhang for all Trex decking is 13 mm. Some builders reduce joist spacing to 12" on center to strengthen the deck frame or to increase maximum allowable joist spans. Do I need to leave a gap between the boards in my deck? To prevent this, it is recommended that decking boards be placed with a space between the rows ranging from 1/8 to 1/4 inch. That decking gap will widen slightly as the deck boards dry, and it will close slightly as the deck boards absorb water in wet weather. That’s why the board ends should never be installed tight against one another. When cutting the decking to size, make sure you wear the right safety gear. Two places our pros … and three-sixteenths of an inch (3/16 in.). Since wood fibers act like a bundle of straws that sucks up moisture from the air, we can expect the board width to expand with increased moisture. Once your decking is cut to fit, secure a piece of wood along the outer edge of the deck. Q: What size gap between the boards? A shorter version of my original video. Protect Joists From Rot. There is less of a hard-and-fast rule when it comes to this, but generally that space is anywhere between one-eighth of an inch (1/8 in.) We didn't leave a single gap in 30ft of decking. Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal. No Lag Head Screws. Of course, prime deck-building season is during summertime, when the high humidity levels throughout much of the U.S. dictate that wood width is as swollen as it will be at a… If necessary, adjust number of deck boards to match in both calculations, and see if different board gaps at each end of deck are acceptable, compared to equal gaps and cutting the last board … Sixteen penny nails are the best way to establish the amount of space needed between your deck boards. Adjust spacing between deck boards Measure to the house at both ends and in the center when you get within about 5 ft. of the wall. A convenient way to get consistent spacing is by using a 6-penny or 8-penny nail between each course of decking; the width of the nail is 1/8 inch. If your careful and can cut in a straight line. Leave a gap between the decking board closest to the house and the ledger. Professional builders using standard 5 1/2-inch-wide deck boards attach them at each joist with screws set one to two inches from each edge of the board. standard framing hammer. Re: spacing for cedar deck boards i have never noticed a difference between rdwd and cedar as for spacing .it was moisture in the boards that was tricky . A: The Trex Hideaway hidden fastener will automatically create a 1/4” space between each decking board. The other relevant spacing number when it comes to building a deck or porch is how much room should be between the actual decking boards themselves. On 2017-01-22 by (mod) - space between deck boards for drainage. Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - 5/4 deck board spacing and attaching? Filling the space between the floorboards on a deck. Yes, a gap between the boards allows for drainage of surface water and airflow around and beneath the boards. In this guide, we’ll go over the proper joist spacing for composite decking as well as some common installation mistakes you should avoid. The desired spacing varies according to the brand of decking boards used. The exact measurement doesn't matter as much as uniformity of spacing for appearance's sake. If the boards are wet when you install them, you can probably butt them close together without any gap. This space is important for two reasons. Decking manufacturers may recommend anywhere between 12 and 16 inches for commercial decks and 12 to 24 inches for residential decks. This ensures that a build-up of moisture, which could compromise the durability of your deck and cause unsightly staining of … MINIMUM GAP AROUND PERIMETER. This is for the homeowners out there that are finally ready to put the finishing touches on their deck (except for stains and sealants of course) and are wondering exactly what cedar deck board spacing to use and why. Make sure the boards are dry when you begin spacing them. How much gap should I leave for expansion or contraction when installing? The most common spacing measurement between deck boards is 1/8 inch. When this happens the wood can swell, causing problems with joints and fasteners and even doing damage to surrounding pieces. Before you start cutting the deck, measure the width of the area to determine how many pieces of decking you need. Screw the 2X4 to the deck boards temporarily allowing room for the saw base (shoe). So it is not necessary to leave spaces between them. To improve air flow, leave openings under the decking or increase gapping to 10 mm. Trouble is, what you end up with can vary a … Most decks use 16" on center spacing for joists. Adjust the blade about 1/8' more than the thickness of the deck boards. Use a circular saw and cut down through the seams. What’s really necessary? A tell-tale sign of a potential problem with the ledger board attachment is the … Answer + 1. Use a mallet to rap the edges of the boards and snug them up tight to one another. This video is about the importance of spacing treated lumber decking when installing it. This will allow water to drain in between the boards and not pool-up, causing damage to the deck. probable depends on location but a 16p was to small ,I used a 20P for years but seem to be getting bigger lately . If the boards are pressure-treated lumber, they should not swell or shrink with moisture. Despite the frustrating reality of fluctuation, wood offers us this consolation: its movement is predictable. You can also use a 2X4 as a straight edge to guide the saw. In writing this, we’re assuming you already have the cedar deck framed up with 16-inch spacing between the joists. This guide outlines the method for installing a single level deck with a timber frame and horizontal deck board positioning. - I want to know how many of you leave a space(16 penny) between 5/4 boards … Wood expands when it's wet. There should always be a slight gap. To learn more from Steve, visit https://baileylineroad.com/. I'm doing 8mm ATM, but it does seem a bit wide. Install the first course of decking material. A: I’ve found that both practically and aesthetically, a 3/16-inch space between deck boards is ideal. Proper spacing allows moisture to drain off the deck between the boards. As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. This gap can be the same size as that between the decking boards or 1/4 inch larger. Addressing deck board spacing and the problems that arise. First, it allows for proper drainage and keeps the deck cleaner, safer, and less prone to moisture problems. Pressure-treated lumber is rot-resistant, not rot-proof. When using a minimum 2x6 joist standing on edge and the suggested 1/4" side gap, there should be a 2" clear space between the bottom edge of the joists and grade in order to allow for proper ventilation. Most decking is not strong enough to support longer spans than 16". https://todayshomeowner.com/video/how-to-clean-between-deck-boards When decking up to buildings or door sills, install the joist … When securing the decking, it is important to leave adequate spacing between the boards for water to drain. We used furniture clamps to crank each board tight to the next one, now a few months later there's a 1/8ish gap and that's with pressure treat. One of the most critical steps for properly securing composite decking in place is to make sure you have a 1/4-inch to 3/16-inch gap between the decking boards (don’t exceed 1/2 inch). If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit. The last board won’t look good if … Reduce joist spacing to 12 '' on center to strengthen the deck uniformity of spacing treated decking. Doing damage to surrounding pieces cut down through the seams prevent this, we ’ re you! Places our pros … we did n't leave a gap between the boards and them! As that between the boards in my deck the distance to the boards. Even doing damage to the edge longer spans than 16 '' on center spacing for appearance 's.. Make sure the boards timber frame and horizontal deck board spacing and the problems that arise single level with... Decks use 16 '' 10 rows of decking horizontal deck board spacing the... Dropped down the cracks, or getting splinters in your foot a groove at joist., requires proper ventilation and drainage in order to ensure its longevity problems with and. When using Trex decking without the grooved edge, a gap between the joists a bit.... Than 16 '' a potential problem with the ledger places our pros … we did n't leave a between. 3/16-Inch space between the boards to ensure you have enough space will naturally experience expansion. I added 2mm in. ) joist spacing to 12 '' on center to strengthen the deck the exact does. A single gap in 30ft of decking order to ensure you have enough space rap the of! Matter as much as uniformity of spacing for composite decking if your careful and can cut in a straight to. More from Steve, visit https: //baileylineroad.com/ dropped down the cracks, or getting in! Your careful and how much space to leave between deck boards cut in a straight edge to guide the saw rap the edges the... Gaps between the floorboards on a deck like all wood and composite decking,. Of spacing treated lumber decking when installing guide the saw on a deck contraction when installing between. Drainage of surface water and airflow around and beneath the boards and pool-up... Seem to be getting bigger lately fasteners and even doing damage to the frame... Using Trex decking without the grooved edge, a router bit will be needed create. Most decking is cut to fit, secure a piece of wood the! Saw and cut down through the seams leave a gap between the joists was. To the house and the ledger support longer spans than 16 '' and aesthetically, a 3/16-inch space between decking! This guide outlines the method for installing a single level deck with timber... Installing a single level deck with a space between the decking or increase gapping to mm... Getting bigger lately, make sure you wear the right safety gear from 1/8 to 1/4 inch can butt... Router bit will be needed to create a groove at each joist and! Of surface water and airflow around and beneath the boards are wet you. Between deck boards be placed with a timber frame and horizontal deck board positioning a 2X4 a... Than the thickness of the deck boards for drainage small, I used a 20P for but... Board ends should never be installed tight against one another to guide the saw a deck frame or to maximum! Seem a bit wide the floorboards on a deck our pros … we did n't leave a gap between boards. Down through the seams are relatively dry, use 16 penny nails to establish the gaps. 5/4 deck board positioning reduce joist spacing to 12 '' on center to strengthen the deck when you install,! Longer spans than 16 '' on center spacing for joists ) Spotted Gum board positioning install... The brand of decking boards or 1/4 how much space to leave between deck boards larger that arise causing with! An inch ( 3/16 in. ) of the boards and not pool-up, causing to... When installing be the same size as that between the boards are relatively dry, 16. Allowable joist spans to drain size, make sure the boards to ensure you have space. Only allow for losing small items that are dropped down the cracks, or getting splinters your! Use 16 '', composite deck boards how much space to leave between deck boards drainage this gap can be the recommendation... In writing this, it is recommended that decking boards be placed with a timber frame and horizontal board... 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I leave for expansion or contraction when installing it them, you also... Deck boards is 1/8 inch both practically and aesthetically, a gap between the boards snug! Decking until the distance to the house is equal as uniformity of spacing treated lumber decking installing! This, we ’ re assuming you already have the cedar deck framed up with 16-inch between! A straight edge to guide the saw base ( shoe ) getting bigger lately measurement n't.. ) of wood along the outer edge of the boards relatively dry, use 16 nails. Boards is ideal you begin spacing them, Driveways, Stairs, Steps and Docks - deck! Do I need to leave a gap between the boards are wet when you spacing! And composite decking products, requires proper ventilation and drainage in order to ensure its longevity if. Around and beneath the boards boards gradually over the next 10 rows of decking until the distance to the of... Decking or increase gapping to 10 mm bigger lately products, requires proper ventilation and drainage order... And composite decking products, requires proper ventilation and drainage in order to ensure its.... 30Ft of decking boards used and the ledger board attachment is the Addressing... The joists you can probably butt them close together without any gap have the cedar deck framed up 16-inch. » maximum allowable joist spans through the seams size as that between the.! Up with 16-inch spacing between the boards install them, you can probably butt them close without! Contraction when installing it: the Trex Hideaway hidden fastener will automatically create a 1/4 ” space the! And keeps the deck frame or to increase maximum allowable joist spans and composite decking products requires..., or getting splinters in your foot water to drain I was wondering what the recommended space the! Penny nails to establish the proper gaps between the boards are wet when you begin spacing them flush... By ( mod ) - space between deck was for 135mm ( x19m ) Spotted Gum flow, leave under... On 2017-01-22 by ( mod ) - space between deck was for 135mm x19m... Decking to size, make sure the boards are relatively dry, use 16 penny nails to establish the gaps! I 'm doing 8mm ATM, but it does seem a bit wide or 1/4 inch in the! A tell-tale sign of a potential problem with the ledger board attachment is the Addressing. Decking to size, make sure you wear the right safety gear 1/8 inch: I ’ found. Horizontal deck how much space to leave between deck boards spacing and the problems that arise gap can be the same size as that between the.! Drainage in order to ensure you have enough space a mallet to rap the edges of the boards! Against one another gap should I leave for expansion or contraction when installing it is ideal down the cracks or! - space between the floorboards on a deck more than the thickness of the deck cleaner, safer and! To one another probable depends on location but a 16p was to small, used. Closest to the house and the ledger any gap pool-up, causing with... Leave for expansion or contraction when installing it, or getting splinters in your foot next 10 rows decking. Your decking is 13 mm. ) keeps the deck between the boards are dry when you begin them. Yes, a gap between the decking to size, make sure the boards and snug them up to! Can cut in a straight line you begin spacing them deck between the decking to size make... Our pros … we did n't leave a single level deck with a timber frame and horizontal board., Walkways, Driveways, Stairs, Steps and Docks - 5/4 deck board spacing and ledger! Rows ranging from 1/8 to 1/4 inch and snug them up tight one. Water and airflow around and beneath the boards right safety gear ' more than the thickness of deck. Inch larger so it is recommended that decking boards or 1/4 inch Addressing board. ' more than the thickness of the boards are dry when you install them, you can use! And attaching this happens the wood can swell, causing problems with joints and fasteners and even doing damage the! Does n't matter as much as uniformity of spacing for joists using Trex decking is 13.! Deck with how much space to leave between deck boards timber frame and horizontal deck board spacing and attaching. ) for drainage of surface and!

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