Wall finishing - avoiding 3+ leaf systems (and other ideas for my space)

seven · 10th December 2008

I'm starting work on my new studio space and ran into a problem on how best to finish some walls. I've included a quick, dirty and not to spec layout to help explain.

This studio is my project studio. I'll spend most of the time writing/recording in the main room. I don't work loudly but I do work well into the wee hours. I don't have much noise to block out as much as keep in. The 12x20 room will house my console, outboard and an array of keyboards.

There is still a fair amount of construction to do on the space which is an out building at the end of my property. At the moment I'm fixing up the base structure, working on water control (drainage, evestroughs, etc) and residing the bulk of it. I have not fully figured out the layout or what I'm doing with the interior roof (which is 9+ feet in the main room) or the floor.

The building is odd because it is post and pier about one foot over a flat cement slab. It used to be a workshop or something.

The red line in the first picture is the roofline. The 4x16 area is the entry. The 12x20 area is the main space. The 4x20 is going to be equipment, server and storage room. There is another 10x15 foot building off to the right which has it's own slab and roof and stands about a foot away. I plan on fully rebuilding this section for the more isolated live room and include an uncoupled yet joined passway between the two.

At the moment the blue lines are bare 2x4 stud with a single 15/32" OSB on the exterior. I have the materials to fill with Roxul Safe ’n’ Sound and 6mil vapour shield inside.

The green lines are the old exterior walls. The green lines boxed in by blue lines have been gutted down to some sort of pink-ish insulation and vapour shield. I plan on replacing all of this with Roxul, double 5/8 drywall, green glue, etc, on the inside of the 12x20 room.

I'm considering building new walls down the green sections not enclosed in blue (right and bottom). This would somewhat decouple from the exterior walls.

That brings us to the second image.

What I'm wondering is the most effective way to treat the entry (4x12) and server room (4x20). Ideally sheet rocking it would be the most useful as it would give me proper rooms to work with. I think this would be bad though because I think this would give me a 4 leaf system (unless 4 feet is enough space to counter this).

My second idea is to insulate the blue walls, vapour shield and cover them with a softer soundboard. This would work fine in the server/storage room as it will see very little traffic. The entry perhaps not so much. I assume the sound board will become well battered in a year or so.

So, what might be the best treatments for these two blue rooms?

Any other ideas for this?

avare · 10th December 2008

Quote:

Originally Posted by seven

What I'm wondering is the most effective way to treat the entry (4x12) and server room (4x20). Ideally sheet rocking it would be the most useful as it would give me proper rooms to work with. I think this would be bad though because I think this would give me a 4 leaf system (unless 4 feet is enough space to counter this)

Four feet is enough to lower the MAM frequency to where it is not a concern. Think hotel hallways.

Andre

seven · 10th December 2008

Andre,
Thanks. I sort of assumed 4 feet was wide enough for the waveforms.

Would I gain anything by having the 4x rooms ultra-dead - IE: Just walls of puffy rock wool? (Of course I wouldn't want to do this. I'd much prefer sheetrock. )

avare · 10th December 2008

Quote:

Originally Posted by seven

Would I gain anything by having the 4x rooms ultra-dead - IE: Just walls of puffy rock wool? (Of course I wouldn't want to do this. I'd much prefer sheetrock. )

You are getting into room treatment now. I would recommend having the 4' wide walls completely absorptive with at least 4" thick material.

Andre

seven · 12th December 2008

That's what I was wondering.

What would I gain in the main room from having the 4x rooms completely absorptive?

If the 4 foot space is large enough to not effect my "air" in MAM, then wouldn't it be better to have the extra mass in the 4x rooms?

So, the options would be (working from the outside)

Option one:

1) Exterior sheeting (15/32 OSB, tyvex and shingles)
2) 2x4 studs 16" OC with rock wool
3) One or two layers of sheet rock (green glued)
4) 4x equipment room to second wall (main room)
5) One or two layers of sheet rock (green glued)
6) 2x4 studs 16" OC with rock wool
7) Two layers of sheet rock (green glued)

Option two:

1) Exterior sheeting (15/32 OSB, tyvex and shingles)
2) 2x4 studs 16" OC with 4" rock wool
3) Material to hold rock wool
4) 4x equipment room to second wall (main room)
5) Material to hold Rock wool
6) 2x4 studs 16" OC with 4" rock wool
7) Two layers of sheet rock (green glued)

10th December 2008	#1
seven Gear maniac Joined: Dec 2008 Location: Canada. Westside! Posts: 263 Thread Starter	Wall finishing - avoiding 3+ leaf systems (and other ideas for my space) I'm starting work on my new studio space and ran into a problem on how best to finish some walls. I've included a quick, dirty and not to spec layout to help explain. This studio is my project studio. I'll spend most of the time writing/recording in the main room. I don't work loudly but I do work well into the wee hours. I don't have much noise to block out as much as keep in. The 12x20 room will house my console, outboard and an array of keyboards. There is still a fair amount of construction to do on the space which is an out building at the end of my property. At the moment I'm fixing up the base structure, working on water control (drainage, evestroughs, etc) and residing the bulk of it. I have not fully figured out the layout or what I'm doing with the interior roof (which is 9+ feet in the main room) or the floor. The building is odd because it is post and pier about one foot over a flat cement slab. It used to be a workshop or something. The red line in the first picture is the roofline. The 4x16 area is the entry. The 12x20 area is the main space. The 4x20 is going to be equipment, server and storage room. There is another 10x15 foot building off to the right which has it's own slab and roof and stands about a foot away. I plan on fully rebuilding this section for the more isolated live room and include an uncoupled yet joined passway between the two. At the moment the blue lines are bare 2x4 stud with a single 15/32" OSB on the exterior. I have the materials to fill with Roxul Safe ’n’ Sound and 6mil vapour shield inside. The green lines are the old exterior walls. The green lines boxed in by blue lines have been gutted down to some sort of pink-ish insulation and vapour shield. I plan on replacing all of this with Roxul, double 5/8 drywall, green glue, etc, on the inside of the 12x20 room. I'm considering building new walls down the green sections not enclosed in blue (right and bottom). This would somewhat decouple from the exterior walls. That brings us to the second image. What I'm wondering is the most effective way to treat the entry (4x12) and server room (4x20). Ideally sheet rocking it would be the most useful as it would give me proper rooms to work with. I think this would be bad though because I think this would give me a 4 leaf system (unless 4 feet is enough space to counter this). My second idea is to insulate the blue walls, vapour shield and cover them with a softer soundboard. This would work fine in the server/storage room as it will see very little traffic. The entry perhaps not so much. I assume the sound board will become well battered in a year or so. So, what might be the best treatments for these two blue rooms? Any other ideas for this? Attached Thumbnails

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12th December 2008	#5
seven Gear maniac Joined: Dec 2008 Location: Canada. Westside! Posts: 263 Thread Starter	That's what I was wondering. What would I gain in the main room from having the 4x rooms completely absorptive? If the 4 foot space is large enough to not effect my "air" in MAM, then wouldn't it be better to have the extra mass in the 4x rooms? So, the options would be (working from the outside) Option one: 1) Exterior sheeting (15/32 OSB, tyvex and shingles) 2) 2x4 studs 16" OC with rock wool 3) One or two layers of sheet rock (green glued) 4) 4x equipment room to second wall (main room) 5) One or two layers of sheet rock (green glued) 6) 2x4 studs 16" OC with rock wool 7) Two layers of sheet rock (green glued) Option two: 1) Exterior sheeting (15/32 OSB, tyvex and shingles) 2) 2x4 studs 16" OC with 4" rock wool 3) Material to hold rock wool 4) 4x equipment room to second wall (main room) 5) Material to hold Rock wool 6) 2x4 studs 16" OC with 4" rock wool 7) Two layers of sheet rock (green glued)