apostolakisl
Senior Member
After a lot of research and cost/benefit analysis/guessing, I have started on my theatre.
I am buidling it in an attic space above the master bedroom. Sound control is important so a lot of effort has gone into that. After moving an HVAC unit, some plumbing, some electrical, a central vac line, a ceiling speaker (bedroom below), and roof bracing, I was able to get a 13 by 18 space with some sloping ceiling on the one side.
I have so far put in the floor. The floor is floating 2x12's spaced in between the ceiling joists resting on the walls of the room below. I would have prefered trusses for the floor but the extra width was going to be very challenging becuase of ceiling fixtures in the room below. I used blocks of sylomer as the floating medium. Supposedly this is going to keep vibrations of the room structure from conducting into the rest of the house. The floor is not touching the house in any way nor is it screwed, nailed or otherwise connected, except for where it rests on the sylomer which is glued to the bottom of the 2x12's where it rests on the top plates of the room below. I put a 1.125 inch tongue/groove subfloor on that which is glued and nailed. I also put 3.5 inch thick mineral wool insulation under the subfloor.
That took me and a buddy about 30 hours to do! It is such a pleasure to not have to hop and trip anymore on the flimsy 2x8's ceiling joists that used to be there. After all of that we only popped 3 nails on the ceiling below.
Next step is to build the walls and ceiling which will be attached only to the floor and thus will float as well. Again I will use the rock wool in the walls and am putting the quiet rock 525 up. I am going to surface mount the lighting and other electrical to avoid holes in the quietrock. I thick carpet padding and carpet will go on the floor and an exterior grade door will be used to the room.
I will report the results when I am done. Probably will be another 8 weeks or so.
I am buidling it in an attic space above the master bedroom. Sound control is important so a lot of effort has gone into that. After moving an HVAC unit, some plumbing, some electrical, a central vac line, a ceiling speaker (bedroom below), and roof bracing, I was able to get a 13 by 18 space with some sloping ceiling on the one side.
I have so far put in the floor. The floor is floating 2x12's spaced in between the ceiling joists resting on the walls of the room below. I would have prefered trusses for the floor but the extra width was going to be very challenging becuase of ceiling fixtures in the room below. I used blocks of sylomer as the floating medium. Supposedly this is going to keep vibrations of the room structure from conducting into the rest of the house. The floor is not touching the house in any way nor is it screwed, nailed or otherwise connected, except for where it rests on the sylomer which is glued to the bottom of the 2x12's where it rests on the top plates of the room below. I put a 1.125 inch tongue/groove subfloor on that which is glued and nailed. I also put 3.5 inch thick mineral wool insulation under the subfloor.
That took me and a buddy about 30 hours to do! It is such a pleasure to not have to hop and trip anymore on the flimsy 2x8's ceiling joists that used to be there. After all of that we only popped 3 nails on the ceiling below.
Next step is to build the walls and ceiling which will be attached only to the floor and thus will float as well. Again I will use the rock wool in the walls and am putting the quiet rock 525 up. I am going to surface mount the lighting and other electrical to avoid holes in the quietrock. I thick carpet padding and carpet will go on the floor and an exterior grade door will be used to the room.
I will report the results when I am done. Probably will be another 8 weeks or so.