Thread: Switch to Trex from PT Deck
07-04-2012, 07:59 AM #1New Member
- Join Date
- Jul 2012
Switch to Trex from PT Deck
I have a 20x14 PT deck. I'm switching to Trex. I decided after buying the decking, I should also do the Trex Elevations so the decking doesn't get wavey due to the imperfect wooden joists. I have 4 posts since my current 2x10's span the 14 ft. The deck is only 6" off the ground if that so a drop beam is not possible. The header beam is currently two 2x10's that the joists run into (no cantilever). On to my questions.
If I go to Elevations and start over...they are 8" joists. So I need an 8" ledger. Should I put the new elevations ledger ON the existing ledger or replace it all together. Also, since the existing ledger is 10", the new ledger is 2" shorter so my existing holes won't line up right. Drill new holes?
Back to the header beam, same thing. I assume I should replace it with the Elevations beam? Should I replace it with 2 beams or would one suffice? If two beams, should I bolt them together like I did the wood? Since these won't warp maybe I don't need to do that or just bolt it in a few places so it doesn't slip?
I'm also picture framing the deck with surface mount posts as railing (I think). Surface mount posts need support underneath so I figured I'd add a steel block (horizontally though) flush with the joists for the post to grab onto. Anything wrong with that logic?
I've seen lots of great answers on this site, great site. Appreciate any advice on the above. Thanks.