This helps prevent rot and decay over time. I know I’m a DIY amateur Sometimes it’s better to leave things to the experts. Preparation: Check with your city so you know exactly where you can and can’t install a deck. 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. 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. If your deck has a main section that is 15 feet long by 5 feet wide and a smaller section that is 5 feet long by 2 feet wide, the area of the deck is 75 square feet plus 10 square feet, or 80 square feet. Step 3. Hunker may earn compensation through affiliate links in this story. Determine size of deck and direction of deck boards. Step 4. We would then round this figure up to the nearest whole number. the width of the decking board (inches) The Results. Thank you for using our decking calculator. 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. As a general rule of thumb, lumber decking should be installed with gaps of between 1/8 and 1/4 of an inch. Boards (includes 10% coverage) Email this estimate Veranda composite decking with SE, square edge designation must be installed with approved composite decking screws. The simplest & easiest to calculate of decking plans is the single rectangle / square. (It is always best to round up the answer to the next whole number.). We will assume that the rectangular / square decking area is going to be laid at ground level with no raised sides. Be sure to account for any uneven areas, angled edges or other non-perpendicular spaces. Calculate Sheathing Needed. 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. For the deck size example provided above, of 200 square feet, you would need 25 boards of this size. Let's calculate the square footage of one decking board: 8 ft * 0.5 ft = 4 ft². Danielle Smyth is a writer and content marketer from upstate New York. That creates approximately another 3 inches width-wise that you wouldn't need material to cover. Deck Board Fastener Calculation. If you are using 2-foot by 4-foot boards, for instance, the square footage of each board is 8 square feet. 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. If you intend to cover the deck with 2 inch by 6 inch boards, you will add the width of the board plus the width of any opening you plan to leave between the boards. Design the deck of your dreams with our new deck design software. BACK NEXT. Great ideas on how to build or just refresh your deck I found in this article: http://www.restumping-melbourne.com.au/build-best-backyard-deck-around/, We arelooking at diagional running decking house wall corner 4m x 7.5m x 8.5 a triagle..how do we order timber lengths without waste…prob merbu. advice . In order to use our coverage calculator, all you need to know is the Square Footage of your deck, Board Width, and floor Joist Spacing that you are using for your deck. When building a deck, gaps between boards are important because they allow for drainage. Decking Length (meters) * Decking Width (meters) * Calculated Results. These easy fit decking kits are just that! Because this square footage is less than one board's square footage, you might still wish to purchase 25 boards. Having the right calculations before getting started can make the task a lot easier. Step 2: Determine Plank Length. 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 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. This calculator works out the joists at 500mm centres and nails are added pick 47 x 100 or 47 x 150 both will do the job but 47 x 150 is recommended if you are raising the deck from ground level . Step 1. Wood substructures split, warp and shift, leading to an uneven surface in the deck boards above. Your email address will not be published. Now we can calculate the number of decking boards needed. 20 ft. Wood substructures split, warp and shift, leading to an uneven surface in the deck boards above. If your supporting structure is the same size as your deck, you can use measurements of it for this step. This means you will need to add 1/8 or 1/4 for each space you plan to have between the boards when determining material square footage. Different materials often specify larger or smaller gaps. In any case, you should always purchase a bit of extra material to account for damage or errors. Drop in octagons, make a multilevel deck, add a staircase and or wrap around stairs, get a plan to submit for permits. A 4×8 sheet of plywood is 32 ft 2. Air dried material is typically spaced at 1/8" edge to edge. A joist is the skeleton bones of the deck. Calculating How Much Material to Purchase You'll need the dimensions of the deck boards you hope to use. Calculator Details. It is best to start by working out how many rows of decking boards are needed. Always refer to the manufacturer's instructions before proceeding. It can be a little tricky if you want to do everything yourself. Once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. Hi Mario, how wide are your decking boards going to be? To calculate the area, multiply the length of the deck by the width of the deck. For the deck size example provided above, of 200 square feet, you would need 25 boards of this size. The joist used for the framing should be 2-inches x 8-inches or larger. So, dividing the area of the roof by 32 will give you the number of sheets needed. If you are using 2-foot by 4-foot boards, for instance, the square footage of each board is 8 square feet. Depending on the manufacturer, the spacing of these can vary, but they often lie in the range of 1/8 or 5/32. Which width of decking board would you like? Decking Area (sq m) Decking board Length (m) 100mm x 47mm Joist at 450mm Centre (m) Some composite boards use hidden fasteners rather than screws. Step 2. Calculate number of deck boards. Enjoy building your deck! This deck will require 32 rows of decking boards. 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. This calculator will tell you the size of the joist boards necessary based on the square footage of the deck. Can divide by the area you can and can ’ t install deck. With this then move on to more advanced decking plans is the same size as your deck to... 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