I would like to build a sound proof door for a cement opening in my room.
The cement opening is w38" x h 81.1" x 7.2" deep. *Please, see pictures included.
The sound proof door will be made of two 1 3/8" HDF boards with 2" padding of rockwool in between.
1. What size should the door be (given the materials and the size of the hole)?
2. What kind of frame (door jamb) should be built for it?
3. Should the door be anchored, instead, directly to the wall?
4. What kind of screws/hardware is needed for this type of REAL heavy door?
Any other suggestion, observations will be greatly appreciated.
You can also start with a simple, solid core door and then add more mass to it (layers of MDF) with a decent finish. Strong hinges are a must as has been mentioned. Also, make sure you get a good seal around the door.
You might also benefit from a copy of "Home Recording Studio: Build It Like The Pros" by RodGervais. I know you aren't building a studio but his discussion of doors might help you greatly.