Glue the trim along the longest sides first and finish with the short sides. This is so that once you have glued your trim along a long edge, you can fold it over at the top and staple gun to secure the corner. You want the folded edges up the top so that there are no extra bulges on the long sides when you join the panels together (as in the next step). Trim the short pieces exactly to size and then glue over the folded corner.

Once glued, allow time to dry.

Now you can join the panels together for the finish. We wanted a concertina effect and decided to join the panels using material tape to act similar to a long hinge.

Lay the panels out on even surface in the order you wish them to be joined and push the first set of panels together.

Starting at one end and pressing firmly as you roll out the tape, run it along the join.

Trim off excess tape when you have finished - you may need a hand to do all this. What you have just taped will create an inner fold.

Because of the concertina effect we wanted, the next board needs to be joined by taping from the other side of the panels. Turn the panels around and tape them.

Now do the next join; this time taping the same side as the first. Continue this pattern until you're finished joining all the panels.

Now you can add tape to the outer folds of the panels for extra strength and to hold the joins together tightly. Since this tape will need to bend both in and out, completely fold back the join when you apply the tape. This allows the tape to flex in and out of the join.

And there you have it: an easy to join and easy to move screen/room divider. As you can see, there are many other options for decorating this project. Have fun!