(146mm) deck board and creates automatic 1/16 in. This can be achieved by laying strips of felt paper doubt, it is best to err on the side of leaving a little extra The plan is to change out misc..boards and open then remaining gaps enough to breath, drain and seal. Cinnaminson NJ 08077 USA Tel: 1-866-4072, Website: http://edeck.com Email: sales@edeck.com Supplies IPE, Garapa, Cumaru, Massaranduba, hardwood decking & siding; Best Practices Guide to Residential Construction, by Steven Bliss. Those damages are most-often found at interior floors installed without sufficient perimeter allowance for the dimension changes that will occur across the board widths of the entire floor.Â, I have different concerns for Cumaru installed indoors than for the same wood species installed as outdoor decking.Â, Indoors the Cumaru Brazililan Teak flooring dimensional change - gaps or buckling concerns include shrinkage gaps as the Cumaru wood flooring dries further from its original installation; shrinkage gaps can show up months to a year later and of course vary depending on the building's indoor humidity level while expansion pressures are more subtle, sometimes showing up as minor bulges or buckling in the floor but in extreme cases as a ruined floor that lifts from the subfloor as we illustrate, Outdoors a concern for Cumaru teak flooring isn't going to include buckling or floor upwards explosion but rather a reduced deck life and poor drainage if the deck boards are installed so closely together that when the boards expand further they touch,closing off drainage and thus retaining still more moisture, thus reducing deck life.Â. wood that has partially air-dried, it is a judgment call. If you have poor ventilation, wider is always better. Trouble is I have no idea what the gap should be betwene the deking planks, or why. In the case of a deck board, this determines whether you have a "cup" warp (concave surface) or a "crown" warp (convex surface). It's tricks like these that allow professional to build a deck quickly and accurately. If the Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. STEP 8. TimberTech PRO™ and TimberTech EDGE™ boards must be a minimum of 1/8” to a maximum of 3/16” deck board spacing. If wood is completely dry when you nail or screw it down it’s likely to stay that way. There are also plenty of jig options if you prefer to buy one. If the deck boards are relatively dry, use 16 penny nails to establish the proper gaps between the boards. Much better than using nails, etc., for spacing. What do you think? The original construction, installation and long term performance of this outdoor performing arts stage floor are described in a series of articles beginning. When I built my decking (using 140mm wide merbau) I went with about 4mm spacing. The folks at YellaWood, recommend using an eight penny nail between rows to create adequate consistent spacing. Attach decking boards. For wood that has partially air-dried, it is a judgment call. When securing the decking, it is important to leave adequate spacing between the boards for water to drain. The width of a nail head is just about right. Decking Span Table; Recommended Maximum Decking Span: Wood Species: 12"o.c. Don’t use a board any smaller than what is recommended for that spacing for that species. Measure near a post. The exact measurement doesn't matter as much as uniformity of spacing for appearance's sake. Women’s heels, people’s toes, small paws and more can slip through and cause an injury. However if the snow pattern on a deck traps water that cannot drain through the deck boards, those conditions increase the risk of leaks at the building wall and in changing weather conditions, can lead to an accumulation of a combination of snow and ice to increase weight on the deck. Item #1217528. But what you may need to focus on first is the spacing between the deck boards. Too little room in-between deck board spacing and your deck boards could buckle when they expand. Share. Covers all the necessary surface area, hiding any substructure components or sawed ends you don’t want visible. David Grudzinski, Advantage Home Inspections, Install start clips on edge of ledger board, centered on each joist. Thank You Being Inattentive to Local Deck Building Code . Installing Start Clips and First Board 1. This article series includes excerpts or adaptations from Best Practices Guide to Residential Construction, by Steven Bliss, courtesy of Wiley & Sons. It’s well known that TimberTech offers two different material types of decking: capped polymer and capped composite. ISBN-10: 0471648361, ISBN-13: 978-0471648369, Hardcover: 320 pages, available from Amazon.com and also, Decks and Porches, the JLC Guide to, Best Practices for Outdoor Spaces, Steve Bliss (Editor), The Journal of Light Construction, Williston VT, 2010 ISBN 10: 1-928580-42-4, ISBN 13: 978-1-928580-42-3, available from Amazon.com. That damage ranges from minor buckling to literal explosion of hardwood flooring in extreme wetting conditions. Questions & answers or comments about deck & porch construction, framing sizing, board spacing, structural connections. I have read hardwoods do not take in enough moisture that make them swell but will rather shrink. Rip cutting lets you customize the width of your deck board. This circular saw attachment will make it easy to widen the gap. But most decks need and can achieve spacing between the deck boards for drainage. More Boards – Decking that is spaced closer together will have more boards. The goal is to have about an 1/8-inch gap (the diameter of an 8d nail) between boards after the decking has dried to its equilibrium moisture content. However in my experience no paint-on water sealant on the top of deck joists will last as long as the life of the deck, and it's also my view that once the deck has been built it is virtually impossible to re-apply any water-resistant treatment to the tops of the deck joists as they're now covered by deck boards. Increase the gap between two tight fitting deck boards to allow for proper water drainage into the Under Deck Oasis under deck ceiling system. to continuous wet conditions or the buildup of leaves and Tweet. Johnson DeckMate deck spacing tool features a durable, high-impact body. If in Thank you for using our decking calculator. Continue reading at DECK FLOOR LAYOUT or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. The primary function is to drain water from the deck. Just use a circular saw and rip the board to the width you want. Thank you. I would follow the specific hardwood seller's recommendations on spacing; Unless you have different instructions from the provider of your specific Cumaru decking, you should use a 1/4" gap for deck board spacing for Cumaru decking, though you might be ok with 3/16" for more-narrow deck boards. Buffalo, NY 14203 USA, Tel: (562) 205-1872 (California), Website: https://www.advantagelumber.com Email: JLevakoff@AdvantageLumber.com supplies hardwood decking & inteior hardwood flooring including IPE decking, Cumaru decking,Tigerwood decking, Massaranuba decking, Garapa decking, deck railings, trim, moldings. It is important not to have too much overhang for the nose of the tread or tripping can be the result. 433. Heart Cut and Edge Grain Boards. I have found differing opinions as to how wide I should space these boards. The maximum joist spacing you can use will depend on the size and allowable span of your joists. However, that doesn't always work for wide timbers like your 135mm ones. slightly and still leave an adequate drainage space. Screw spacing in deck boards is important for structural and aesthetic reasons. 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 … Addressing deck board spacing and the problems that arise. But that is more or less an aesthetic observation. x 5-1/2 in. Below is a photo of the stage in use [image file], courtesy Lon Church, Summerblue Arts Program. 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 the fall season, both the heat and humidity begin to drop. Both sizes have their pros and cons. The author of the article recommending the wider gap says that water and debris will fall through more easily and air will flow easier through the wider gap. If adding additional framing, be sure to keep all boards level and in plane across the tops. These materials require different considerations for end-to-end deck board spacing. A 1/4" gap between 6-inch wide boards can give as much as 1/2" total gap if the boards are installed damp or wet and then dry  out - a bit more than desired - as your question suggests. 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. Make Your Own Jig – A homemade jig can make spacing a lot easier and more uniform across the deck. Compare; Find My Store . While this gap is fairly small, it is still a crucial component to any good deck. We have an acquaintance that needs to close or fill in the gap between the boards on their deck floor, this must be done from the topside as we can not gain access to the underneath side (less than 10" of clearance) they are screening the deck and want to eliminate insects from coming up through those gaps between the boards. When Lon Church constructed this outdoor stage for the Summerblue Arts Camp (Two Harbors MN) in 2001, we knew that the structure would have to endure severe winters and strong summer sun without the protection of a roof. for water to drain. A house is only as strong as its foundation, and a deck is only as strong as its frame. Discussed here: What is the proper gap to leave between deck boards?W hy is it important to space deck boards apart by a small gap? Deck stairs are typically made from 2 x 12 stringers spaced about 12 to 16 inches apart. Larger gaps, such as 1/4”, allow more of this material to fall through the deck. 2 in. piece of plywood and a scrap 2×4 cut to the width of your joists. In this case, some space between the boards is a good idea because the wood can actually expand slightly over time. Water Drainage – Adequate gaps are needed for water drainage. for pricing and availability. We include a description of tightly-butted tongue-and-groove pressure treated deck boards as well as typical 5/4" thick pressure treated deck boards that should be spaced for drainage. Posted on October 24, 2013 by Ben Roberts. There is no change in the total mass when snow (or ice) melts to liquid water form. In decking applications subject I do think becasue they were cut the untreated edges drew in even more water. 2. Hence the spacing of 1/16th of an inch? An email has been sent to your selected email address. Membranes such as Vycor Deck Protector can also be used The tips above will make spacing a snap on your new deck. if you use cedar, it can’t be smaller than a 2x6, Hemlock, can’t be smaller than 5/4x6. Between end-to-end boards, allow a 3/16-inch space. Home Inspector David Grudzinski provided the too-tight deck board photographs just below, and comments: Here is a deck poorly installed with no deck spacing, and no ventilation. And because the surface is used as a performing stage, we used 5/4 tongue and groove treated wood for the surface - no gaps for drainage. If there is a post near the house, you may need to remove the next-to-last board, then install the two last boards at the same time. - Ed.]. If the board are too tight, water will sit on the deck and try to find it’s way into your deck or home. If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit. Editor's note: the weights of a given volume of snow and of the water produced when the snow melts will be identical. When deck boards are too tight, water will not be able to drain, causing the wood to rot over time. - Anonymous by private email 2019/10/16. or self-adhesive membrane (one approved for UV exposure) 433. Deck joist spacing should never exceed 16” on center (with the exception of MAX deck boards, which allow for maximum 24" on center). Shrinkage will be less on kiln-dried (KD) boards. Cumaru Deck Board Expansion – Hardwood decking may expand by as much as 1/8" on 6" wide boards and 1/16" on 4" wide boards during times of high moisture, thus proper gapping is recommended. This precision also creates perfectly consistent spacing between the boards for a flawless look across the entire deck. An email has been sent to your selected email address. Watch out: don't leave wider gaps between still-wet treated lumber deck or porch boards during construction or you may find that as the wood dries, excessive deck board gaps can form a trip hazard, especially for people wearing high heeled shoes. ft.) you could save $1,011 by using shorts! I have all the tools, all the timber, sa blooming great box of great think shank "green" 8x2.5" decking screws, a cordless drill and two spare batteries. John Wiley & Sons, 2006. 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 the fall season, both the heat and humidity begin to drop. If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit. When you’re figuring out decking the number one concern for most people is what kind of wood to use. When using grooved-edge boards, our hidden deck fastening system installs between the deck boards, fastening them to the joists with no visible deck screw heads on the walking surface. Pin. Additional metal flashing is in use to protect the deck joist top from rot. Yet water can seep into that joint. Install the first course of decking material. The last board won’t look good if … The eighth-inch spacing provides for a safer surface for walking. tree debris, it is best to protect the tops of the joists from 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. Original Source: http://timbertownaustin.com/wood-projects-and-profile/proper-deck-board-spacing, Posted on March 24, 2015 by Ben Roberts, This Is What Ipe Looks Like After 12 Years. This deck has been there since 1981 and it may well be that originally it was built properly and over years the boards shrunk as they dried. between beams or slab etc). Steps to protect deck joists from rot. If the boards are wet when you install them, you can probably butt them close together without any gap. Leaving the gap too wide before the material is properly seasoned can cause the gap to widen further, making it unsightly and even problematic for pedestrians wearing shoes with narrow heels. ASHI cert # 249089, HUD cert# H-145, is a professional home inspector who contributes on various topics including structural matters.David Grudzinski, Cranston RI serving both Rhode Island and Eastern Connecticut can be reached at 401-935-6547 fax- 401-490-0607 or by email to Davidgrudzinski@aol.com. To avoid deck joist top rot Morshing applies peel-and-stick flashing membrane material to joists and ledgers during deck construction. The most common spacing measurement between deck boards is 1/8 inch. Before nailing or screwing boards down, lay out a section putting spacers between each board. Share. If in doubt, it is best to err on the side of leaving a little extra space for the wood to swell when wet. Your measurements and layout need to be accurate, not only for the primary deck surface but for the smaller parts, like your deck stairs. Compare; Find My Store. The 20x20" Cumaru deck "tile" shown here and sold by AdvantageLumber.com is a variation on use of Cumaru teak decking; deck tiles, placed over a proper support system, can provide a suitable walking surface on flat roofs; these tiles ought not suffer the same moisture-related expansion or contraction concerns as those faced by Cumaru outdoor decking or indoor finished hardwood flooring that we discuss here. (the diameter of an 8d nail) between boards after the decking On 2019-06-11 by (mod) - deck has nails sticking out and gaps size of pinky. We have no relationship with advertisers, products, or services discussed at this website. Wooden decks are a common exterior addition to homes, allowing families extra space to use when enjoying the outdoors. Many jurisdictions following the International Building Code, which requires a minimum 1/8-inch spacing between boards. Gaps that are narrow (1/8”), can catch debris, specifically on top of the joists, and can be difficult to clean out. Manual for the Inspection of Residential Wood Decks and Balconies, by Cheryl Anderson, Frank Woeste (Forest Products Society), & Joseph Loferski, October 2003, ISBN-13: 978-1892529343. Mr. Grudzinski adds: Not to mention when it snows and the snow melts, the added weight on the deck by a non draining deck will be immense [... if trapped water results in a build-up or accumulation beyond the anticipated design of the deck. Getting the board spacing right the first time can save you the hassle of having to pull the boards up later, or live with gaps that are too narrow or large in the long run. x 5-1/2 in. Deck and floor board spacing diagram: Only Mark Every. Generally, an acceptable gap between deck boards is between 1/8 inch and 1/4 inch. Deck joists are typically spaced either every 12 inches or 16 inches on center. Leave Gap: If the pressure treated wood has been kiln dried after treatment (KDAT), leave a 1/8” gap (the thickness of an 8-penny nail) between the boards when attaching, since the wood will expand slightly over time. Ensure there is a minimum gap of 5-6mm between each deck board. the nails are all sunken under the wood surface. Joists that are at least 45 mm wide (seasoned hardwood and treated soft wood) or 50 mm wide (unseasoned hardwood) are recommended in order to avoid splitti ng when receiving nails or screws from placement of decking boards. Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal. Gaston Gosselin said:I am commenting to let you know what a terrific experience my daughter enjoyed reading through your web page. Extra spacing is also important between board ends and where boards meet a wall when decking runs perpendicular to the wall. spacer to leave enough space for the boards to swell Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. Treated Lumber – Usually treated lumber will have some shrinkage so you can butt the boards almost right against each other during installation. Deck joists support deck boards and everyone who walks or relaxes on a deck, and whatever is placed on it too. The deck board spacing gauge worked great on spacing my deck boards. Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. How to Stagger Deck Boards. That may explain part of the too-tight boards and no drainage - someone didn't realize that synthetic deck boards, unlike (usually wet) treated lumber decking, will not not shrink and open up later. Answered. Wider gaps permit more airflow, which feeds fire, and it also more likely to catch embers. In this video I offer up two deck repair options to assist Lydia, from Toronto, on creating wider gaps between the boards of her three year old cottage deck. Proper spacing allows moisture to drain off the deck between the boards. My friend coated joists with Thomson's water seal. Wider gaps permit more airflow, which feeds fire, and it also more likely to catch embers. Space between decking planks. Dry material should be spaced a full 1/4 inch apart to prevent damage to the boards as the material absorbs moisture. This system includes a few simple components: Reading online I found that ideally the spacing should be 1/4". If you don't like the wide deck board Gap gaps you'd have to remove and reset all of your boards. None of the installation instructions I've seen for Cumaru suggest a 1/16" gap for board installation.  Instructions for installing Cumaru flooring are offered by quite a few wood flooring and decking vendors. How can I widen the spaces between my deck boards on my 3 year old cottage deck? Trex Enhance Naturals 16-ft Foggy Wharf Grooved Composite Deck Board. the boards are tight fit(no space) and also tight fit to the edge wood board( the wood board sit on top is metal capping). Without the right deck spacing, the boards may expand, cup, and buckle out of place. Best Construction Practices for decks or porches. Photo (left) courtesy of Mark Morsching, Everflashing, shows an Everflashing stainless-steel flashing product installed over the deck ledger. x 12 ft. Pressure-Treated Hem-Fir Lumber is ideal for a variety of applications, including decks, landscaping, stair support, walkways and other outdoor projects where lumber is exposed to the elements. Below we note that those steps look a bit slippery too. Within a given wood species or decking product, the thicker the board, the stronger it becomes, relatively speaking. In my OPINION that hazard is uncommon unless your deck users include frequent stiletto-heeled shoe wearers.Â. I do use flashing at the deck ledger and other key locations prone to water entrapment and rot. Most decks are built with 16 and 20 foot boards, but those popular lengths come at a premium price. Many sellers of hardwoods instruct to space at 3/16 – 1/4”. Joist and Deck Board Spacing Guidance. For This will add to the overall weight but provide a little more structural integrity. as a barrier between pressure-treated joists and joist hangers, Wet Wood – If your wood is damp during installation place the boards closer together since they’ll shrink once they dry. You could also just buy round wooden dowels from the hardware store and stain them a darker color and put one in-between each, Just get a drill bit the diameter of your dowels, put some tape around the bit to prevent it going into the rail too deep or the stair riser. 24"o.c. This is not advised for P T wood. Didn't realize they came 2 to a pack so thought I bought too many, but was glad I did. That means on an average sized deck (430 sq. Cumaru is about twice as hard as oak, average in dimensional stability. They are rugged and they proved to be invaluable in lining up deck boards, particularly on long 16 ft boards which had a curve to them. Why Boards Warp . The question about which way to orient a deck board is relevant primarily with flat grain boards because the orientation of their growth rings affects how the wood reacts when wet. I used tiling spacers to get it consistent. DECK BOARD GAPS & SPACING at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice. With heart cut and edge grain boards, the issue of warping is very … I live upstairs an the deck has nails sticking out an gaps size of pinky u can't sweep cause everything falls down under can't even relax on the deck. decking is installed wet, as is often the case for pressure treated Pre-drill all boards, whether using screws or nails. Bear in mind that other decking designs will require different techniques and joist spacing. Model #CS010608E2S01. Cumaru Deck Board Gapping – Allow a minimum of 1/8" gap between board widths on 4" wide decking, and 3/16" gap between board widths on 6" wide decking for drainage, airflow and expansion. The bright yellow color was easy to spot and was an added plus. There are other factors affecting the amount of future expansion and shrinkage of any wood flooring (indoors) or decking (outdoors) such as. flashings, or other metal hardware to reduce corrosion. (133mm) to 5-3/4 in. 16"o.c. Then lay out 5 - 6 rows of decking boards, cut to length. You can calculate the spacing so that you don't have to slice the final board lengthways. Fire Control – Deck boards that are widely spaced will spread fire more quickly. Rot – Deck boards that are spaced too tightly together are more likely to trap dirt, debris and moisture, which is the perfect mixture for making rot. It sounds like the deck nails need to be hammered down and set or perhaps pulled and replaced with deck screws. Expect more shrinkage of width in hot or dry areas. The distance a deck board traverses between the joists is unsupported, so boards of different thicknesses are required for varying spans. Seems easier than cutting strips of roofing paper and may offer as much or more protection. The stairs should be at least 36 inches wide. Make Space in Moist Areas – If you live where there is a fair amount of moisture in the air the boards will swell. What's the maximum deck joist span? The Sweet Spot – Most people agree that 3/16” is a good gap between boards. 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 … important to leave adequate spacing between the boards Without it rot is more likely, mold can build up easily and slick boards can become hazardous. Spacing between deck boards provide a few critical functions. Also see our BOOK REVIEW of that book. So, for 24 o.c. I infer from your question that your Cumaru is to be used as an exterior decking. Joists spaced 16 inches on center will take both 5/4 and 2-inch deck boards (which are actually 1-1/2 inches thick). Below is the same Summerblue Arts Camp performing stage seventeen years later, in February 2018.
2020 deck board spacing too wide