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Hello
I am having an extension built and am having a stud wall placed in part of it to segregate a room.
I have a few questions if I may. (see attached drawings)
1. The architect has specified 75mm by 50mm stud wall with 75mm rockwool sound insulation. One of the rooms is to be a bathroom, is this stud wall thick enough to deaden the sound of someone in the bathroom?
2. The horizontal noggins in the stud wall are at 450 centres, seems like a lot to me ‘overkill’ do I need noggins that closely spaced. My architect said you could split them into thirds, but its better to be ‘safe than sorry’.
3. The stud wall sole plate sits directly on the screed of the solid floor as oppose to the concrete slab under it, is that ok?
4. As you can see from the attached image, the head plate of the stud wall is attached directly to the underside of the rafter (or noggin) and has been cut to fit. (is it ok to cut head plate?) Is this an acceptable way to do this? My builder has said that I don’t need to connect the head plate directly to the rafter or noggin and that I can leave the dry lined insulation board between them and just connect to that and screw through to the joist/ noggin. My architect said this would lead to instability and is not recommended as you want a solid structure as possible. Any thoughts?
5. The top of the stud wall (head plate) is not parallel with any rafters, it lies fairly evenly between where the rafters would be in the parallel direction. Can I have a stud wall between rafters in the parallel direction? My architect said that’s fine as long a I place a number of noggins between the rafters so that I have something to fix the head plate of the stud wall to.
I am having an extension built and am having a stud wall placed in part of it to segregate a room.
I have a few questions if I may. (see attached drawings)
1. The architect has specified 75mm by 50mm stud wall with 75mm rockwool sound insulation. One of the rooms is to be a bathroom, is this stud wall thick enough to deaden the sound of someone in the bathroom?
2. The horizontal noggins in the stud wall are at 450 centres, seems like a lot to me ‘overkill’ do I need noggins that closely spaced. My architect said you could split them into thirds, but its better to be ‘safe than sorry’.
3. The stud wall sole plate sits directly on the screed of the solid floor as oppose to the concrete slab under it, is that ok?
4. As you can see from the attached image, the head plate of the stud wall is attached directly to the underside of the rafter (or noggin) and has been cut to fit. (is it ok to cut head plate?) Is this an acceptable way to do this? My builder has said that I don’t need to connect the head plate directly to the rafter or noggin and that I can leave the dry lined insulation board between them and just connect to that and screw through to the joist/ noggin. My architect said this would lead to instability and is not recommended as you want a solid structure as possible. Any thoughts?
5. The top of the stud wall (head plate) is not parallel with any rafters, it lies fairly evenly between where the rafters would be in the parallel direction. Can I have a stud wall between rafters in the parallel direction? My architect said that’s fine as long a I place a number of noggins between the rafters so that I have something to fix the head plate of the stud wall to.