this innovative deck screw for pressure treated lumber offers the torx ttap drive system which greatly reduces cam-out and the thrupoint which eliminates splitting and splintering.
hot dipped galvanized nails or treated deck screws should be ok, but check the label on the box to be sure it will work with the chemicals in your lumber. for each joint, a 2x4 would take 2 nails, a 2x6 would take 3, etc. stay about 1" away from the edge of the board and space the nails about 1 1/2" - 2" apart.
deck joist sizing and spacing. a 2x8 up to 12 feet; 2x10 to 15 feet and 2x12 to 18 feet. the larger the deck, the larger the joists. in typical deck construction, with a ledger on one side of the joist and beam on the other, the size of the joists is driven by the size of the deck, based on the general maximum spans mentioned above.
this is why you find so much debate on how to set the spacing between your decking, because the answer truthfully is, it depends. screw width. to remove the
deck joist sizing and spacing enjoying your deck on a beautiful summer day is the perfect way to entertain guests outside or just unwind and relax. and while its important to have a deck thats aesthetically pleasing to you, the most vital part about your deck is making sure its structurally sound.
5 comments on leaving gaps between pressure treated wood deck boards you can follow comments to this article by subscribing to the rss news feed with your favorite feed reader. thomas boni says:
june 8, 2010 2:01 am subscribe. treated lumber is often very wet heavy when purchased, so it's much more likely to be okay to space yours more closely. tangentially, the 2x stock is usually only used for the framing. your lumberyard should have thinner, nominally "5/4" treated decking that is 1" thick.
install decking with 3" pressure-treated compatible deck screws instead of nails. use two nails for each joist to deck board connection. locate screws about 3/4" from the edges of boards.
secure the deck boards with 2 nails or screws where each board crosses a joist. 3 nails or screws may be necessary over the rim joists. whether you choose to use nails or screws, be sure to choose galvanized fasteners to keep them from rusting out. they should be at least 3-1/2 inches long to penetrate the framing.
how to fasten pressure-treated decking. the screw length is very important; these screws need to penetrate in the joist by 1-1/2 inches. when it comes to the board ends, predrill to prevent splitting. the screws should be countersunk, but only enough to dimple the surface. once all of the decking is in place, snap a chalk line
tools and tips for proper deck board spacing. dry vs. wet wood if your wood is damp during installation place the boards closer together since theyll shrink once they dry. if wood is completely dry when you nail or screw it down its likely to stay that way. plan accordingly based on how dry your decking is.
treated lumber is fairly new. for a long time porches, stoops, etc. all were made of pine or fir, fully exposed to the weather, these have lasted for many, many years. i also used pine boards, 1.25" thick, one coat all sides of a weather seal, for a sidewalk. these were nailed to a treated lumber frame.
this video is about the importance of spacing treated lumber decking when installing it. i also touch on the importance of putting the crown down to help prevent cupping in your boards.
pick a spacing and stick with it. bottom line 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.
deck framing. the rim joists of the deck are usually connected to the posts and to each other with bolts, but large diameter screws, called lag screws, also can be used. these screws should be at least 1/2 inch in diameter if they will support the weight of the deck, and the point should sink at least 1 1/2 inches into the stationary member.
most decking screws are 8-gauge and, while 2 1/2 inches is the minimum length needed to hold decking boards to the joists, 3-inch screws are commonly used to provide extra holding power against the upward pressure of shrinking or warping boards.
proprietary deck screw or nail coatings. many decking screws sold in home centers have newer proprietary ceramic and epoxy coatings over an electro galvanized core. originally developed for use with cca-treated lumber, many have now been tested and approved for use with acq and copper azole.
composite thinking. well, my 2x6 joists are spaced the maximum recommended 16 inches on-center on the new deck and 12 inches on-center on the refurbished one. although the joists span about 6 inches farther on the former than on the latter and add a cantilever, this still sets up an easy, if unscientific, comparison.
galvanized fasteners work fine on pressure-treated lumber, while stainless steel is a better choice with redwood, western red cedar, and tropical hardwoods. composite decking can usually be installed with galvanized fasteners, but it is smart to check with the manufacturer. stainless steel deck board screws should also be used near salt water.
give it a dry run and stagger the boards. do a dry run of your boards by laying them out before attaching to the frame. if your deck dimensions are longer than your decking boards, staggering the joints is important when laying decking boards. the staggered boards improve stability and the appearance of the deck.