1st time studio build for radio & music production

Jason - check out Fletcher Insulation - they have a product called Insulco semi rigid which is the same as 703.

Thanks John, I'll check them out.

After looking at various ways of ventilating my recording room, I decided to go for the ultrafonic ventilation silencer design (http://www.ultrafonic.com.au/Drawings/Ventilation.pdf) I've built my boxes for air in/out of my recording room. I'm now wondering what the best method is for sealing the where my ducting meets the walls of the recording room. Any ideas or advice would be welcome. Most of my issues at the moment are to do with doing the final bits to make my RR airtight. There if a ceiling beam which stops my angled outer wall from touching up to the ceiling and I'm wondering how to seal around it. Would GIB/Caulk do it? Also, how do I seal around my inner/outer doors? I've also attached some pics of how its all going. Everything is taking twice as long and costing twice as much as I originally imagined, but I'm still having fun. I just keep changing the subject when my wife asks me how much money I've spent so far. Big thanks! Jason

Door-frames separated; I say yes. It's a separated frame already so decouple it. Inner Wall/GB; yes use sealant Outer wall: just Fill the whole above the stud with some mass (add a clad or anything) and seal it of with sealant, pretty please :)

Progress is good on my studio build, thanks to some help from a friend (much easier when there's two people instead of one building!) I have a question about the bass traps I'll be putting together. I'm still having trouble getting hold of Insulco semi rigid, and there is a company here in NZ called Autex who make a polyester based product called Quietstuf Acoustic Blanket. The specific item I think may work for a bass trap is called AAB 35-50. Its 50mm thick and has a density of 35KG/m3. I've learned that 50mm thick insulco semi rigid is 32KG/m3. Does this mean that the Autex product would make an equivalent or better bass trap?

no. Tho a higher density will work better for low-end trapping, it's not that big-a-deal

After looking at various ways of ventilating my recording room, I decided to go for the ultrafonic ventilation silencer design (http://www.ultrafonic.com.au/Drawings/Ventilation.pdf)

I'm looking at that design, and not understanding. Why would you need to put flex duct INSIDE the silencer box? That just seems like a waste of money to me. What purpose does it serve? The silencer should work just fine by itself, without the ducting in there, surely? So what is the theory behind doing it that way? - Stuart -

Cheap as that flex is, it is hardly a waste of money. To seal up one of these things, seems like a good idea to flow the flex like it is in the picture. It also makes it an easier task to connect the in/out air flow having a connection built into the design. All we are trying to do is stop sound from entering the same duct that is in the silencer box. I might do that myself ;)

Hmm, sorry. thats twice I've tried to comment on NORTHAVENUE STUDIO (complete) and my post has ended up in the wrong thread!! Don't mind me :oops: either i'm banned or there's a bug?