to help you get a better ideas of the quantity and cost of materials youll need, as well as measurements and specifications to build your deck according to a plan, weve created several deck building calculators. these decking calculators will help guide you through the process of building your deck, giving you access to design plans
for instance, if building a deck out of 2-by-6 lumber, you would use your plans to first measure the total length of decking boards you need. then you call a lumberyard and ask the price per foot on that size and species of lumber, such as 2-by-6 construction heart redwood.
calculations assume 1/8' spacing edge to edge between boards. 4' wide material is calculated at 3-5/8' and 6' at 5-5/8' net coverage. typical spacing for kd / kiln dried decking is 1/4' for 6' boards and 3/16' for 4' boards. air dried material is typically spaced at 1/8' edge to edge.
size of your deck, which can be determined in either: total square footage; length x width in feet and inches total length of your decks perimeter board size; the angle of your decking 90 to the joist giving a horizontal, straight-across look
the american wood council has two handy online calculators that can handle a range of specifics. for instance, if you know the dead load of the deck will be less than the prescriptive 10 lb., then you can select 5 lb. or 7 lb. and eek out a longer span. on the other hand, if you build in a ground-snow load that exceeds 40 psf, then you can enter your snow load in the live load field to size a joist span to handle heavy snow.
estimate the total costs of building a composite deck. with less care and maintenance than wood, youll see that seven trust costs less over a lifetime. porch railing furniture lighting pavers dryspace fasteners our decking cost calculator can easily estimate the material costs of your deck. the value of enjoying your new outdoor
final deck lumber calculator considerations. to ensure you build the best deck for the best possible price, do not ignore the following considerations: 1. permits: some decks require permits from your city. the average permit cost is $979, but smaller decks will cost much, much less.
for a small deck, 10 × 12 feet, for example, determines how much lumber youll need by using your detailed plans to count all the pieces of each size: 12-foot 2 × 4s, 8-foot 2 × 6s, and so on for all framing members, including stairs and railings.
calculate the initial value for d, then round it up to the nearest inch. this tells you the size of the beam needed to support the porch's roof. in the example, d calculates to 7.75. this means the example porch would need a 6-inch by 8-inch beam.
calculate how many deck boards, hidden fasteners, and screws are needed for your deck given the deck size and preferred board length. estimate the cost of decking, hidden fasteners, and screws by entering a price per board.