| mdf is good when hidden. it wants to be covered with plywood or other wood. it is
great mass but will fall apart with any moisture or sudden collision....if you did
3/4 mdf/ 3/4 mdf and 1/2" ply on every face, you would have a solid door.
sheetrock can also be used in this fashion - i have found that where a website
or guide says use two sheets, use five or seven - mass is amazing - it is the
only way to stop sound.
looking at your post again, i have had trouble with mdf and screws - this changes when the mdf and plywood
are laminated with glue and the screw can hit both
be well
- jack |