as se composite decking installer you can use 4x2 treated joists as with all wood will rot eventually, if you i would put down mot type 1 wack it down then put a good quality landscape fabric down will reduce the rotting of the timber, you might have to dig out first of course.
when replacing the existing boards with composite decking on a deck with 24-inch frame spacing, you will only need to add joists 12 inches on center between existing joists. for decks with 16-inch spacing, measure and mark each joist that is at 48 inches. remove all unmarked joists and rehang at 12 inches on center.
the spacing between deck joists is commonly referred to as joist span in professional lingo. it doesn't matter what you call it -- it's still a critical calculation when it comes to building your new deck. though it may seem complicated to the first-time deck builder, the way to calculate the
rim joist a joist on either side or the end of the deck. may have stairs attached and typically opposite of the ledger board. riser the vertical board nailed to a stringer. scarf cut a joint used to join two pieces of decking end-to-end, usually cut at a 45 angle.
if you're planning to replace old wood decking with pvc or composite, measure the joist spacing first. most deck joists are centered 16 in. apart, which is the maximum span for most low-maintenance decking. if you plan to install your decking at a 45-degree angle, your joists may need to be 12 in.
and i want to step the decking so it looks nicer than having one join in the middle. now i have read that centers of the joist should be 40cm apart, this is fine if i were to do 2 full boards across as each ends hits a joist, but as i want to step it, the half decking board 1.2m will not hit a joist.
the joist spacing required for composite decking will depend on: * the strength of the particular composite decking material chosen * the dimesions of the composite decking material home glue and
what is the proper joist spacing for composite decking? i am looking to build a deck and i've been eyeing some composite options. before you start, i've looked at seven trust and love it, but my wallet doesn't.
4 answers. best answer. as se composite decking installer you can use 4x2 treated joists as with all wood will rot eventually, if you i would put down mot type 1 wack it down then put a good quality landscape fabric down will reduce the rotting of the timber, you might have to dig out first of course.
blow this critical design detail and your decking could buckle on a hot day. keep in mind that, compared with wood, this stuff is bendy. don't just assume it can span joists on 16-inch centers.
actually he was right. depending on what direction the joists run its only a few more. for the 24ft span it would need 25 joists prob need 2x 14ft to make the span and 16' needing 19 joists. if you want to do diagonal pattern with the decking, then 12' spacing is needed.