Tape mat board to backing board?

[kjkahn]

In segment 23 of From Camera To Print, Michael taped the mat board to the backing board. In Issue #15 of the LLVJ, Bill Atkinson did not. What's the thinking on this?

[David White]

In segment 23 of From Camera To Print, Michael taped the mat board to the backing board. In Issue #15 of the LLVJ, Bill Atkinson did not. What's the thinking on this?
[a href=\"index.php?act=findpost&pid=140599\"][{POST_SNAPBACK}][/a]

I've never seen this technique used for archival matting.  Usually the mat overlay is hinged at the top so that it can be lifted.  I would think that taping the overlay to the back board would not be a desirable thing to do as you would probably have to destroy the mat if it was ever necessary to reach the print for any reason.