Mark Boyce posted:Mallard, Thank you for the advice!! I have been questioning in my mind how these boards will hold up. The tan board is leftover from building my Ceiling Central also supported on 16" centers, and I haven't had issues, but.... I did lean on the brown boards yesterday, but that is not the same weight for an extended period of time. I wish I had the funds to go out and buy the best, but I don't, so I'm trying to make do with what I have. It's a precarious juggle I must admit.
Al, George, Dan, Phil, Thank you!!
The sag can take months or years.
One option is to take some 1x2 and use them on edge like girders to reinforce the boards. Attach them on the underside with glue and screws (countersink the holes and screw from the top). If the underside does not have the faux wood on it, use carpenter's or Elmer's white glue; otherwise, use gorilla glue.
And don't ask me how I learned this stuff.
