On Tue, 04 Jul 2017 22:44:07 GMT, Dave
m wrote:

I bought a sliding barn door that was the right width but a bit too tall. The
bottom has a groove for a guide, so in order to shorten the door, I cut a
couple inches off the top.
The trouble is, I cut off the hardwood at the top of the door that the roller
assembly screws into and now all that's left is the particle board interior.
The particle board isn't strong enough to hold the weight of the door on the
rollers. So... I need to figure out how to attach the rollers to the top of
the door, with only particle board to screw into. (In retrospect, I clearly
should have cut extra height off the bottom - too late now.) I'm wondering if
I drill holes, fill them with epoxy, and then set the screws in place if that
will be strong enough. Thoughts?

Here is the door for reference:
http://www.homedepot.com/p/Masonite-...7590/206193108

Ouch! That is an expensive mistake. If you saved the piece you cut
off, you could use a strong, resin type wood glue and try to glue it
back in place. For additional strength you could glue dowels and or
biscuits into both pieces before assembling.

Posting a few pictures of what you are dealing with would probably
help the group, help you.