Thank you for using our decking calculator. A joist is the skeleton bones of the deck. number of joist based on spacing; the length of the joist; deck joist needed in lineal feet (in addition to the result for 1 it adds 2 joist for doubling the end ones plus a ledger and rim board in the lineal foot count) the lineal feet of the beam material; the number of boards for the decking Which width of decking board would you like? Material quantity calculations are approximate and based on using full lengths of decking boards, measuring 4200x125mm (LxW), with a 5mm gap between each board when installed. Air dried material is typically spaced at 1/8" edge to edge. Width in inches divided by 5.65 = Number of deck boards. If your deck is slightly out of square (different widths), calculate results for both widths, and set out each end to suit. Boards (includes 10% coverage) Email this estimate Veranda composite decking with SE, square edge designation must be installed with approved composite decking screws. (adsbygoogle = window.adsbygoogle || []).push({}); To calculate decking board quantities required to build a deck is relatively simply process. Also, see if you have to pull permits. Supplied flat packed, ready cut, with a fixing kit and with easy assembly instructions. Wood substructures split, warp and shift, leading to an uneven surface in the deck boards above. If you're not opting for timber decking, or are looking to use timber boards in a different size than that referenced in the table, have a go with our decking equation. These easy fit decking kits are just that! In any case, you should always purchase a bit of extra material to account for damage or errors. Step 4. Your email address will not be published. the width of the decking board (inches) The Results. With an extra 15 percent, you should be prepared for potential mishaps. Use the sliders below to set the size of deck you require, and the calculator will estimate the number of decking boards and framework joists required for your project. BACK NEXT. Save my name, email, and website in this browser for the next time I comment. The dimensionally stable steel of Trex Elevations stays in place, giving you consistently stronger, straighter, safer and smarter decking than what wood can offer. I know I’m a DIY amateur Sometimes it’s better to leave things to the experts. Then find the closest sqm to what you require. Required fields are marked *. How To Build A Deck View All D.I.Y. Enjoy building your deck! This depth will determine how much concrete you need and how long your footers should be. Hunker may earn compensation through affiliate links in this story. 140mm. Next, we need to work out the total lineal metres of decking required. If the deck is to overhang the supports, refer to your original design plans to determine the measurements of each side. Example: If the deck is 3 metres wide and 5 metres long (including fascia board and decking board overhang) and the decking boards are 90mm wide and using a 4mm spacing between decking boards, your calculation would be: 3000/(90+4) = 3000/94 = 31.9149 which you would round up to 32. Just cross-reference your size of decked area (for example, 2 by 3m) and it presents the number of deck boards you will need. Lumber calculator formula. For example, is your deck close to the ground or more than 1m off the ground which would need a handrail. Let's round the result up (it's better to have more than less) - we'll need 72 boards. To do this, measure the width of the deck ensuring you allow for the fascia board and the decking overhang (a detailed outline can be found in the “Installing decking boards” guide). 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 … 70mm* 90mm. Since the deck is 20 feet long, the square footage of the gaps is 3 inches by 20 feet – or 5 square feet. Deck footings: How deep to dig deck footings? Footers should be set 6 inches deeper than the frost line for your area. As a general rule of thumb, you should leave at least 1/8-inch of space between composite boards. Calculate the decking required based on the actual width of the boards you will use, and determine how many boards you’ll need according to square footage. That creates approximately another 3 inches width-wise that you wouldn't need material to cover. To simplify the process, we’ve created this deck stair calculator to help you determine the correct measurements needed to carry out your project. Because this square footage is less than one board's square footage, you might still wish to purchase 25 boards. Calculations assume 1/8" spacing edge to edge between boards. Calculating Material Requirements. A reliable deck material calculator will take the guesswork out of your next decking project by helping you determine the number of decking boards you’ll need. It is best to start by working out how many rows of decking boards are needed. A 4×8 sheet of plywood is 32 ft 2. The joist is what holds the planks on your deck in place. Area To Cover (Length) * input to one decimal place. Drop in octagons, make a multilevel deck, add a staircase and or wrap around stairs, get a plan to submit for permits. Decking Area (sq m) Decking board Length (m) 100mm x 47mm Joist at 450mm Centre (m) If you were to use 25 boards, 23 of them would have a 1/8-inch gap, but the outer two pieces would not. We will assume that the rectangular / square decking area is going to be laid at ground level with no raised sides. Before beginning to build a deck, you'll need to determine how much material you need. advice . Eg. If you need special components that are strength graded to meet Building Regulation requirements please consult your Q-Deck ® retailer who will pass the enquiry onto Hoppings Softwood Products for consideration. Calculate number of deck boards. Determine length of deck board required. Substitute these numbers into the board foot formula to find the board footage per piece: board feet = length(ft) * width(in) * thickness(in) / 12. board feet = 8 * 10 * 1.25 / 12. board feet = 8.33 BF. When building a deck, gaps between boards are important because they allow for drainage. How to Calculate the Framing Size for a Deck. Then divide the width of the deck by the width of your decking boards plus the gap between the decking boards, which is recommended to be 3-4mm. Total Number of Boards = DSA / (SBC X 1.1) Calculate How Much Deck Material You Need For Your New Deck. You need to calculate how many deck boards are needed for the deck. Put this together with our own friendly national delivery service and you're on to a winner! Afterward, you're going to measure the length and width of each of the deck boards. we will start with this then move on to more advanced decking plans. The simplest & easiest to calculate of decking plans is the single rectangle / square. A wooden deck is really nothing more than an outdoor floor. For the deck size example provided above, of 200 square feet, you would need 25 boards of this size. Rely on manufacturer recommendations for spacing whenever possible. Use Our Free Deck Design Software. Wood substructures split, warp and shift, leading to an uneven surface in the deck boards above. To calculate the area, multiply the length of the deck by the width of the deck. Hi Richard, Do you have any more details for your deck? If you’re brand new to deck installation, follow the steps below to ensure you buy the correct quantity of all materials: 1. If you are using 2-foot by 4-foot boards, for instance, the square footage of each board is 8 square feet. Please enter and select your measurments, then click calculate to view a product list needed for your deck. She owns her own content marketing agency, Wordsmyth Creative Content Marketing (www.wordsmythcontent.com), and she enjoys writing home and DIY articles and blogs for clients in a variety of related industries. You will be designing in no time. Building stairs for your deck is often considered “the most difficult part of” the construction project. Working out how many timber decking boards to buy. The final calculation is as follows: “Number of decking board rows” x “length of the deck in metres” x “1.1″ (multiplying by 1.1 automatically adds on the 10% waste) = total lineal metres. As a general rule of thumb, lumber decking should be installed with gaps of between 1/8 and 1/4 of an inch. http://www.restumping-melbourne.com.au/build-best-backyard-deck-around/, Measuring and taking photos of your footings. However, you will need to consider not only the size of the boards used but also the spacing between them as this will also take up space. I have an area I am thinking of getting a deck installed it is 9 meters by 5 meters the boards will run the long way 9meters , I need a price of what it would cost in materials for both size merbu 90mm and 140 and how much material I will require it is going partial over a concrete slab and some grass so stumps will need installing maybe around 8-12 ? Working out how many timber decking boards if your deck the Results holds! Much deck material you need and how long your footers should be 2-inches 8-inches. 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