woodarama wrote:
i'm not sure what you mean about srinkage,because mdf will not srink.i
used the 1/4" in my bathroom with no problem.it came in strips about 4"
wide,a double beadbord if you will.as for the corners and face
joints,the best way to handle those are to scribe them and if there are
any irregularities then use caulk.

I used 1/4" MDF beadboard in our kitchen. Good scribing and a bit of
caulk work just fine for the corners since it is painted. I cut the
beadboard at the grooves and butted it together so the joints do not
show. I also cut it so that the grooves/beads were aligned with studs
and used a finish nail gun to hold it in place. Both the chair rail
and baseboard fly over the beadboard and I have had no bulges at the
seams or anywhere else. By the way, you can nail it all along the sill
plate under the baseboard.

Jim