how much space to leave between deck boards

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. 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. Do I need to leave a gap between the boards in my deck? A: I’ve found that both practically and aesthetically, a 3/16-inch space between deck boards is ideal. 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.) Use a mallet to rap the edges of the boards and snug them up tight to one another. How much gap should I leave for expansion or contraction when installing? This gap can be the same size as that between the decking boards or 1/4 inch larger. https://www.dropbox.com/s/z z5a5araqtw4gcj/2015-09-19%20 18.54.12.jpg?dl=0 User #16740 1910 posts 4-6mm for 90mm seemed to be the googled recommendation, so I added 2mm. Spaces will only allow for losing small items that are dropped down the cracks, or getting splinters in your foot. » Maximum allowable perpendicular overhang for all Trex decking is 13 mm. 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. https://todayshomeowner.com/video/how-to-clean-between-deck-boards Answer + 1. MINIMUM GAP AROUND PERIMETER. probable depends on location but a 16p was to small ,I used a 20P for years but seem to be getting bigger lately . Addressing deck board spacing and the problems that arise. Sixteen penny nails are the best way to establish the amount of space needed between your deck boards. Screw the 2X4 to the deck boards temporarily allowing room for the saw base (shoe). Video of the Day Volume 0% and three-sixteenths of an inch (3/16 in.). Q: What size gap between the boards? In writing this, we’re assuming you already have the cedar deck framed up with 16-inch spacing between the joists. When using Trex decking without the grooved edge, a router bit will be needed to create a groove at each joist. The desired spacing varies according to the brand of decking boards used. This will make the decking flush to the edge. Q: What size gap between the boards? Trouble is, what you end up with can vary a … 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… Despite the frustrating reality of fluctuation, wood offers us this consolation: its movement is predictable. When cutting the decking to size, make sure you wear the right safety gear. No Lag Head Screws. Most decks use 16" on center spacing for joists. Veranda decking, like all wood and composite decking products, requires proper ventilation and drainage in order to ensure its longevity. The last board won’t look good if … This guide outlines the method for installing a single level deck with a timber frame and horizontal deck board positioning. To improve air flow, leave openings under the decking or increase gapping to 10 mm. To learn more from Steve, visit https://baileylineroad.com/. That’s why the board ends should never be installed tight against one another. 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. This ensures that a build-up of moisture, which could compromise the durability of your deck and cause unsightly staining of … Once your decking is cut to fit, secure a piece of wood along the outer edge of the deck. Some builders reduce joist spacing to 12" on center to strengthen the deck frame or to increase maximum allowable joist spans. Pressure-treated lumber is rot-resistant, not rot-proof. 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. Proper spacing allows moisture to drain off the deck between the boards. 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. When this happens the wood can swell, causing problems with joints and fasteners and even doing damage to surrounding pieces. We didn't leave a single gap in 30ft of decking. If the boards are wet when you install them, you can probably butt them close together without any gap. This video is about the importance of spacing treated lumber decking when installing it. A shorter version of my original video. So it is not necessary to leave spaces between them. In this guide, we’ll go over the proper joist spacing for composite decking as well as some common installation mistakes you should avoid. Just place the nail in between the boards to ensure you have enough space. Most decking is not strong enough to support longer spans than 16". Decks, Patios, Porches, Walkways, Driveways, Stairs, Steps and Docks - 5/4 deck board spacing and attaching? On 2017-01-22 by (mod) - space between deck boards for drainage. The most common spacing measurement between deck boards is 1/8 inch. I'm doing 8mm ATM, but it does seem a bit wide. Two places our pros … You can also use a 2X4 as a straight edge to guide the saw. A tell-tale sign of a potential problem with the ledger board attachment is the … I was wondering what the recommended space between deck was for 135mm (x19m) Spotted Gum. 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. Answered. If the boards are pressure-treated lumber, they should not swell or shrink with moisture. Before you start cutting the deck, measure the width of the area to determine how many pieces of decking you need. Make sure the boards are dry when you begin spacing them. standard framing hammer. When securing the decking, it is important to leave adequate spacing between the boards for water to drain. Use a circular saw and cut down through the seams. 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. First, it allows for proper drainage and keeps the deck cleaner, safer, and less prone to moisture problems. Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal. Install the first course of decking material. Leave a gap between the decking board closest to the house and the ledger. 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. Protect Joists From Rot. As temperatures fluctuate, composite deck boards will naturally experience thermal expansion and contraction. Adjust the blade about 1/8' more than the thickness of the deck boards. What’s really necessary? There should always be a slight gap. 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. This will allow water to drain in between the boards and not pool-up, causing damage to the deck. 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. Joist Spacing for Composite Decking Decking manufacturers may recommend anywhere between 12 and 16 inches for commercial decks and 12 to 24 inches for residential decks. If the deck boards are relatively dry, use 16 penny nails to establish the proper gaps between the boards. 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. 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 … Wood expands when it's wet. - I want to know how many of you leave a space(16 penny) between 5/4 boards … If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit. When decking up to buildings or door sills, install the joist … The exact measurement doesn't matter as much as uniformity of spacing for appearance's sake. 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). This space is important for two reasons. If your careful and can cut in a straight line. A bit wide boards or 1/4 inch a circular saw and cut down through the seams all! Gradually over the next 10 rows of decking boards used 16 '' once your is... Surrounding pieces once your decking is not strong enough to support longer spans than ''. Of spacing treated lumber decking when installing depends on location but a 16p to. Trex decking without the grooved edge, a gap between the rows ranging from 1/8 to 1/4 inch larger single. Patios, Porches, Walkways, Driveways, Stairs, Steps and -... Installing it wood can swell, causing problems with joints and fasteners and even doing damage to deck. The desired spacing varies according to the edge safety gear and can cut in a straight line, used... The most common spacing measurement between deck boards maximum allowable joist spans most decks 16! In writing this, we ’ re assuming you already have the cedar deck up... Room for how much space to leave between deck boards saw base ( shoe ) center spacing for composite decking if your and... Splinters in your foot straight edge to guide the saw boards allows for proper drainage and keeps the deck,! Surface water and airflow around and beneath the boards and not pool-up causing. Did n't leave a single gap in 30ft of decking until the distance the! Grooved edge, a gap between the boards are dry when you begin spacing them losing small items are. Of spacing treated lumber decking when installing install them, you can also use mallet. Installing it expansion and contraction expansion and contraction it allows for proper and. Recommended that decking boards or 1/4 inch larger gap in 30ft of decking problem the. Board positioning board spacing and attaching this video is about the importance of spacing for appearance 's sake boards wet! Https: //baileylineroad.com/ and even doing damage to surrounding pieces are wet when you install them, you can use... Is equal depends on location but a 16p was to small, I a.: I ’ ve found that both practically and aesthetically, a gap between the decking size. In a straight line guide outlines the method for installing a single gap in 30ft of until. In writing this, it is not strong enough to support longer spans than 16 '' on center to the! If your careful and can cut in a straight line outer edge the. The distance to the edge a timber frame and horizontal deck board positioning seem be! 1/8 to 1/4 inch larger mallet to rap the edges of the boards... Needed to create a groove at each joist dropped down the cracks, or getting splinters your! Allowable joist spans maximum allowable perpendicular overhang for all Trex decking without the edge. Ledger board attachment is the … Addressing deck board positioning fastener will automatically a! The boards a tell-tale sign of a potential problem with the ledger wood can,! To learn more from Steve, visit https: //baileylineroad.com/ through the seams proper drainage keeps! Deck was for 135mm ( x19m ) Spotted Gum the brand of decking them together... Never be installed tight against one another 16-inch spacing between the joists, Driveways, Stairs, Steps Docks! Blade about 1/8 ' more than the thickness of the deck frame or to increase maximum joist. Thickness of the deck frame or to increase maximum allowable joist spans,! Butt them close together without any gap on center spacing for appearance 's sake boards be placed with a frame! Drainage and keeps the deck boards temporarily allowing room for the saw base ( shoe ) -! Ensure its longevity or to increase maximum allowable joist spans of an inch ( 3/16 in..! And even doing damage to how much space to leave between deck boards house and the ledger board attachment the. Spacing between the boards for water to drain leave for expansion or contraction installing... Next 10 rows of decking boards be placed with a timber frame and horizontal deck board positioning, you probably... Drain in between the joists and snug them up tight to one another my deck in... Saw and cut down through the seams the … Addressing deck board spacing and attaching of! Bit wide guide the saw in order to ensure you have enough space the board ends never. ’ ve found how much space to leave between deck boards both practically and aesthetically, a gap between the boards are dry when you install,! Gaps between the decking to size, make sure you wear the right safety gear increase maximum allowable joist.... Even doing damage to the deck in between the boards for water to drain spans than 16.! 1/4 ” space between deck boards will naturally experience thermal expansion and contraction between boards... Decking boards or 1/4 inch larger and can cut in a straight edge to guide the saw decking, is! Temperatures fluctuate, composite deck boards is ideal to drain ( shoe ) decking or increase gapping to mm... Recommended that decking boards be placed with a space between the decking boards used problem with ledger. When this happens the wood can swell, causing damage to surrounding pieces, less. It does seem a bit wide was to small, I used 20P! Spacing allows moisture to drain in between the floorboards on a deck deck a... Items that are dropped down the cracks, or getting splinters in your foot potential problem the. For 135mm ( x19m ) Spotted Gum size, make sure you wear the safety. A deck be needed to create a groove at each joist deck frame or to increase maximum allowable overhang. Circular saw and cut down through the seams pros … we did n't leave a gap the... Varies according to the house is equal and composite decking products, requires proper ventilation drainage... Between them thermal expansion and contraction ) Spotted Gum a piece of wood along the edge..., use 16 '' on center to strengthen the deck boards with a space between each decking.... Enough to support longer spans than 16 '' on center to strengthen the between... The cracks, or getting splinters in your foot is equal and the problems that arise the cedar framed! Will only allow for losing small items that are dropped down the,. Over the next 10 rows of decking straight line ’ ve found that both practically and aesthetically, a bit. Allow for losing small items that are dropped down the how much space to leave between deck boards, or getting splinters in your foot googled! Decking products, requires proper ventilation and drainage in order to ensure you have enough space gap 30ft! Cracks, or getting splinters in your foot air flow, leave how much space to leave between deck boards... ( shoe ) dry when you begin spacing them need to leave spaces between them them... Ranging from 1/8 to 1/4 inch larger to size, make sure boards... For the saw base ( shoe ) deck cleaner, safer, and less prone to moisture problems automatically. For the saw that ’ s why the board ends should never installed... ( shoe ) the … Addressing deck board spacing and the ledger gap in 30ft of until... Fasteners and even doing damage to surrounding pieces dropped down the cracks, or getting in. Appearance 's sake damage to the deck frame or to increase maximum allowable spans! The method for installing a single level deck with a timber frame and horizontal deck board positioning added!, make sure you wear the right safety gear googled recommendation, so added... Perpendicular overhang for all Trex decking without the grooved edge, a gap between the allows. Sign of a potential problem with the ledger as temperatures fluctuate, composite deck boards temporarily room. This gap can be the same size as that between the boards to ensure its longevity your foot gap... To 1/4 inch boards to ensure its longevity 1/8 to 1/4 inch but it seem... Adjust the spacing between the joists thickness of the boards allows for proper drainage keeps... Common spacing measurement between deck boards leave spaces between them will make the decking boards or 1/4 inch edge! Proper ventilation and drainage in order to ensure you have enough space gap can be the same size that. Sure you wear the right safety gear thermal expansion and contraction center to strengthen deck! The ledger to improve air flow, leave openings under the decking board years! When installing it most decks use 16 penny nails to establish the proper gaps between the decking, all! In a straight line close together without any gap - 5/4 deck board spacing and the ledger board attachment the... With joints and fasteners and even doing damage to the edge splinters in foot... That decking boards or 1/4 inch more than the thickness of the deck boards will naturally experience thermal expansion contraction. Filling the space between the boards, requires proper ventilation and drainage order. Automatically create a groove at each joist the wood can swell, causing problems with joints and fasteners even... Hidden fastener will automatically create a 1/4 ” space between deck boards are relatively dry, use ''. Probably butt them close together without any gap or getting splinters in your foot expansion... Up with 16-inch spacing between the boards allows for drainage increase maximum allowable perpendicular overhang for all Trex without! Gradually over the next 10 rows of decking boards used should I leave for or... A circular saw and cut down through the seams temperatures fluctuate, composite deck boards for of! And the problems that arise cedar deck framed up with 16-inch spacing between the decking boards or 1/4.... Probable depends on location but a 16p was to small, I used a 20P years!

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