How do you install Trex directly to concrete??

Cannot install any decking directly to concrete. The chemicals in concrete along with water will cause decking to fail, even composite. You would need to install "sleepers" on the concrete. Use pressure treated 2X4's on the flat, glued and screwed to the concrete 12" apart. Decking goes on top of the sleepers. You can come to the site and view replies. You will also get an email when there are replies.

Hi! These will show you:

https://www.bing.com/videos/search?q=installing+trex+decking+on+concrete&qpvt=installing+trex+decking+on+concrete&FORM=VDRE

Go to your Trex dealer - they are the best people to assist you. Make sure you follow directions so you don't void the warranty.

Hi - you have to build almost like a wood grid on top of the concrete in order to have something for the tree to nail into. My contractor did our tree deck but he first built a wood frame with lumbar, then arranged the trex on top.