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Soundproofing with exposed ceiling

So I've seen a lot of studio spaces and researched a lot. Basically I'm remodelling an 35' x 25' unfinished room (looks like an unfinished basement but above ground) and building 3 rehearsal rooms.

Soundproofing with exposed ceiling

2 things I'm trying to determine. I'm doing R-13 insulation and double 5/8" sheet-rock with green glue on all walls. Should I also run hat channel and isolation clips before the sheet rock? And if so I don't believe I need to do this on the 2 exterior walls just the adjoining room walls correct? How much difference will the sound clips really make with this set up?

Also dumb question but the ceiling is exposed, the roof is the only thing above that but if the rock was run all the way to the ceiling, leaving the exposed ceiling would still have substantial bleed to the next room wouldn't it?  Asking because it will be a task to frame around electrical to be able to double rock and green glue the ceiling but it may be the best choice I believe? 

Any thoughts/input would be appreciated.

Soundproofing with exposed ceiling

Ceiling Construction Question

Hi all,

I read Rod Gervais' book, second edition. In the book, he discusses securing 2-3 layers of gypsum between the ceiling joists to add mass to the ceiling and then caulking around the gypsum panels to secure and seal. My questions are: should I use Green Glue caulk for the caulking around the panels or just regular caulk, and is there any benefit to using Greenglue compound between the panels as described for wall assemblies, but not here?

Thanks! Sorry if this question has come up before, I couldn't find it in a search.


HELP!, roof/ceiling venting plan, is this an isolation disaster?

I am having a back garden practice/recording cabin built. Structure will be (from outside to inside)

Concrete base with DPM
timber frame (total area 4x5m)
OSB with 18 mm shiplap cladding
4x2in wooden studs
100mm RW3
2 layers of 15mm acoustic plasterboard.

OSB covered with EPDM

I was quite concerned when I saw how the roof has been put up with roof joists on top of walls and a huge ventilation gap from one side of room to other(see pic).

the builder intends to put 2 layers of 15mm acoustic plasterboard (as on internal walls) attached from below to the roof joists with 75mm of rockwool above.
Builder emphasises the importance of ventilation to avoid condensation (which I get) but my concern is that all that is between the inside and outside is the 2x15mm plasterboard and 75mm Rockwool (with an air gap open to the eaves)

. I am unsure if this setup will compromise the already modest isolation.

Structure today is as it appears in pic but work is due to continue in a few days. have attached a rudimentary sketchup image of the design. a pic of the roof from inside and one of outside as it is today.


Is this an acoustic disaster?

Is there anything I can do at this stage to improve the outlook if it is that bad, preferably without ripping off the roof or anything that drastic?

I feel foolish not having focussed on these details prior to construction but feel now that I need to make urgent decisions to avoid having wasted money on materials while having a massive open gap to the outside, Any advice would be very much appreciated.
many thanks

Adjustable reflective ceiling

I'm building a live room for my studio. The room is a former bedroom and the dimensions are not ideal. (8'2" H x 12'1" x 12'9 1/2", plus a small alcove that was a closet with bifold doors. Doors have been permanently removed.) I do have the ability to completely rip it apart and rebuild it, but due to budget constraints, that will have to wait. For now, I'm working with what it is.

I live in the country, and this former corner second-floor bedroom is already sufficiently quiet with the existing standard construction in place. I will treat the room so that the walls can be adjusted to various levels of reflectivity/absorption, depending on the demands of the project at hand. This I can accomplish easily enough by building my own absorptive panels and fractal diffusers. Area rugs can be placed or removed to handle floor reflectivity/absorption.

My question is about the ceiling. What do you call that ceiling configuration comprised of individual adjustable tiles tilted in various directions? I want to build a setup like that and swap out panels as needed depending on the need for higher reflectivity or higher absorption. I'm going to start with all or mostly reflective panels made from OSB and use hooks and hanging wire. Tilt is adjustable by more or less wire at one end. (Unless someone has a better idea for hanging and adjusting such tiles.)

What I'd like to know is, assuming an initial setup of 100% reflective tiles:

1. What is a good size for these tiles? I'm thinking 2'x2' - this number based on nothing other than it being an easy size to physically handle. Will use a better number if someone suggests one based on acoustical criteria.

2. What kind of pattern should these tiles be placed in? How far apart should these tiles be? If they line up edge-to-edge, it would be tricky to swap out individual tiles, so I'm thinking of placing them several inches apart. What angles should these tiles be with respect to each other?

All this keeping in mind the nearly square shape of the room walls to minimize unwanted modes. This is not a control room, so critical monitoring is not a requirement. I just want to make this room a nice little live recording room with a pleasant ambiance and minimal flutter.

I tried searching for information on such a ceiling configuration, but I could not think of what to call it, so I haven't found anything useful yet. I would appreciate any and all advice about such a ceiling.

Primacoustic Nimbus Ceiling Cloud - Anyone Have One?

I was looking at these ceiling clouds by Primacoustics...they measure 24 inches x 48 inches x 2 inches

Perfect for the area I want to cover above my mix position

Has anyone out there had any experience with or used / currently using this one?

What attracts met to this particular one is not only the size, but its lightweight construction and ease to fit.

I'd be happy to hear from any members who may wish to chime in with their thoughts or ideas on how effective this particular type would be, or if there is something similar they could recommend.

I like the idea of not having to DIY with this pre-fab construction, I'm not too keen on having to fabricate one myself

I can pick one up here in Australia for around the same price taking into account the conversion rate.


- Sean.

Attached files

Ceiling Fans & Feedback

Can a bank of ceiling fans being turned on or off mid-way through a venue cause a change in the way a room responds to or reflects/absorbs sound waves, thereby causing feedback problems?

Someone keeps blaming the fans for the sound troubles occasionally experienced at a church I attend. Is this a possibility? I want to give a "sound" and professional answer. I have a hard time believing the fans are truly the cause, but I've been wrong before.

Having trouble with low ceilings and vocals.

I moved my entire studio into a bedroom that has really low wood ceilings (7-8 feet). My vocals and acoustic guitars seem to have a lot of bass. I'm using a RODE ntk. Do you think I should move it to an area where there is vaulted ceilings? The room its in now is probably the quite room in the house. Would using an eq fix the problem?