John Sayers' Recording Studio Design Forum Archive

Great pics and good progress. Looking forward to seeing more.

Progress pics:
All of the joists are in - except one, which I'm leaving out to facilitate roof space access for now. Just working the finer points of bracing the frame. Finishing the soffit for the out-take ducting. This is the silencer above the soffit. Now to start work on the ducting, and more insulation...and some caulking. There's always more caulking to do!

Just working the finer points of bracing the frame.

What is your plan for the actual leaves? If it is just drywall, then yes, you will need bracing. But if you are going to use plywood or OSB as the first layer, then you don't need it. Both of those are very strong in sheer, which is what the bracing accomplishes....

There's always more caulking to do!

- Stuart -

Soundman2020 wrote:What is your plan for the actual leaves? If it is just drywall, then yes, you will need bracing. But if you are going to use plywood or OSB as the first layer, then you don't need it. Both of those are very strong in sheer, which is what the bracing accomplishes....

And he's back - hey Stuart! It's been a little quiet around here without you. Everything good?

The internal walls will be plasterboard - so yes, bracing required. I think I'm pretty much there now with the internal frame. It's rock solid. I did some plywood next to the door frame to make double sure that can't move! I'm thinking I will install plywood on the north external leaf (inside the workshop) - probably 17mm. Then I can install plasterboard over it when I get to that stage. The plywood will mean the wall is really well braced and enable me to screw into the wall at any point for hanging tools etc in the workshop.

I've started working on the ventilation ducting. Next is to install a vent for the passive intake in the east brick wall (above the top layer) and connect ducting between that and the silencer, which has been installed above this... More insulation going in over the next pay cycle or two...$lowly

Preping for Plywood (17mm) cladding on the workshop wall. I found some cheap mdf (16mm) that I may put over the plywood for some added mass. Insulation slowly creeping around the walls...

It's officially it's own room! Clad with 18mm plywood and 16mm chipboard. Also started putting insulation in the ceiling. There is a lot of cutting and custom fitting involved. As the gap is about 140mm deep I got 70mm Bradford Soundscreen and am going with two layers, as can be seen in this pic. Getting there...

I am thinking of putting a layer of 16mm chipboard (High moisture resistant) on all of the internal walls before I put plasterboard on - it's cheaper than 16mm plasterboard and it means I won't have to worry too much about finding the studs when I put the plaster layer up - thoughts? For the ceiling I was toying with the idea of a 12mm layer of plywood before plasterboard.

Looking good! !

I am thinking of putting a layer of 16mm chipboard (High moisture resistant) on all of the internal walls before I put plasterboard o

Yep! Absolutely. But I'd suggest using 16mm MDF or 16mm OSB for that. I'm not sure that that's the same as what you call "chipboard" down-under, but I don't think so. I believe "chipboard" is a low density thing... Another alternative is 16mm plywood.


- Stuart -

Hey Stuart,

Good to hear from you. Thanks for the look in.

Chipboard - aka particleboard - has a density in the order of 650 kg/m^3. The 16mm chipboard sheets I used on the workshop wall were about as heavy as the 18mm plywood...i.e. Heavy!

Progress pics... Now to re-organise the workshop and get stuff back out of the studio...it's like a game of Tetris! 1 layer of rigid against the plywood and a layer of fluffy for the in-between space...then it will be one layer of rigid on the studio side and then clad. 16mm MDF on its way for the walls (found a good deal on some 'seconds' sheets). This job is sooooo fiddly! Interleaved joists make this a bit of a challenge!

I just noticed the photo of the lining inside your silencer boxes: Are you SURE that is duct liner???? It just looks like ordinary foil-faced insulation to me! Duct liner is normally black or grey, and I've never seen it with a metallic foil on the face... Are you 100% certain that you have the right stuff in there?


- Stuart -

Hey Stuart,

I'm pretty sure. It's this stuff, which is billed as internal HVAC duct liner. The black or grey colour was additional cost and mean't as a cosmetic thing according to their information. The foam stuff was VERY expensive here

http://bradfordinsulation.com.au/Commer ... el#current

Scott

OK. As long as you are sure it is the right stuff.

This is what duct liner normally looks like:

https://www.google.cl/search?q=duct+lin ... 4&dpr=1.25

See if you can get some acoustic specs from the manufacturer: the only specs I saw on their website were thermal specs.

It would be interesting to know how it compares to traditional duct liner.

- Stuart -

Progress pics...lots happening.
Inner wall insulation done. I got some 16mm MDF melamine seconds for cheap...so mismatched colours, but all of this will be under the top layer, so no biggie! More wall cladding to go. On the look-out for a good deal on plywood for the first layer on the ceiling. Still lots to do, but I'm happy with the progress to-date.

Soundman2020 wrote:OK. As long as you are sure it is the right stuff.

Yeah, it's the right stuff. The silver stuff is a weave and not just a foil layer, plus the data sheet says it's for internal duct lining and it does have some acoustic measurement data on it.

Hi Scott,

it's been really interesting reading this thread as I am mid build with some little questions to iron out, similar to ones you came across I think.

Just a quick question about mounting your internal joists; is there a name for the type of bracket you used to attach your joists on top of your frame?

I also have to navigate a tight space with an angled ceiling and will probably need to shave the corner off the joist in a similar manner to avoid connecting with the outer layer. Did you receive any structural advice about shaving the corner off?

Keep up the good work!

Thanks,

Adam

Hey Adam,

adamthedrummerboy wrote: Just a quick question about mounting your internal joists; is there a name for the type of bracket you used to attach your joists on top of your frame?

Yep, they call them 'triple grips' here.

adamthedrummerboy wrote: I also have to navigate a tight space with an angled ceiling and will probably need to shave the corner off the joist in a similar manner to avoid connecting with the outer layer. Did you receive any structural advice about shaving the corner off?

Nope.. ...that was a case of 'gotta do it or it don't fit!'. The joists are at full thickness before they leave the top plate...but...be aware, I did not receive any engineers advice on that.

Good luck with your build.

Scott