Live room ceiling, any suggestions appreciated.

[Glenn Kuras]

Get the following book save yourself a lot of time and money. Sound proofing is not cheap nor easy to do.
Amazon.com: Home Recording Studio Build it Like the Pros (0082039530345): Rod Gervais: Books

[peelproductions]

Hi Glen,
I do have the book and have read it a few times.
To be honest it does not really deal with this type of ceiling structure, which is the standard here in New Zealand, that well. There are some garage ceiling examples but they involve pitched triangle or scissor type trusses which are very rare down here. With this type of truss you can beef it up and then build a new internal room. With my type of truss you just lose to much head room doing this. I am converting just one end of the garage so converting the trusses to a different type is just not a possibility.
This is the second studio I have built, and I have a pretty good grasp of what's required and how much it costs.
The issue I am grappling with is how to beef up the bottom of the roof structure, just at one end, to an equivalent mass level to match two layers of 16mm drywall hung from acoustic hangers of the bottom chord of the existing trusses.
Theres another studio that Wes is doing here that has some spray in insulation up against the bottom of the roof that creates a "leaf", but I am not sure what the product is and not sure if it is available here.
Any other direction would be appreciated.
Thanks
JohnG

[wellnessmusic]

If you don´t want to re-build the rafters you can hang a new ceiling framework in iso-hangers from the existing ceiling. Even if concrete-slab you should consider to float the floor as well.

// Bjorn

[jinksdingo]

If you wanna stop the drums from leaking thru the ceiling lay down some rubber and put in an attic storage floor using yellow tongue flooring cut down and entered in thru the roof (some tiles and battens removed. Cut the batten half way on tha rafter and pre drill the ends so you can reinstall when floor in.)

While your at it pack more insulation in. silicon join the mid cuts and the trim around where trusses meet rafters.

On the down side in the live room before the floor feed a nylon tie every half meter for the stiff polyester bats 25 or 50 mm. A dowel on top of the ceiling for lightweight bats to hang from. Some thin mdf sheets can be fitted to the underneath of the bats if you want some liveness.

A diffuser can also be hung but needs to be fitted to ceiling where there is a rafter.

You could also suspend a ceiling using commercially available material suspended in aluminium frames if you treat the joins.

What you do on the down side of the ceiling is best to aid the sound in the room.