Most Urgent:suspended ceiling/false ceiling

[mandeep]

Hello Dear All,

Was planning to do suspended ceiling for my room size 13.5' lengthx10' widthx10'height, with:

Grid ceiling system: Featuring grid acoustic mineral fibre ceiling panels 2'x2' + steel T-grid.

Main concerns:-

(1)Vibration:- would the above ceiling have vibration of the grid at high dynamic low/mid/high freq. sounds or high volume levels?If yes whats the solution then.

Vinay bhai have a similar ceiling, has anyone found it to rattle at low/mid freq's.

I have one question"why vinay have used sponge in the walls, i mean for what purpose.

(2)Can i put insulation rolls above the ceiling, for sound attenuation?

Or

I should adopt some other ceiling solution like the drywall suspended ceiling with metal framing system.would this be better than the above.

Thanks in advance.

Regards

 

[vinay]

Hello Mandeep,

I have used acoustic ceiling tiles of world famous brand "Armstrong". There is very low vibration when volume is quite high especially when there are scenes of good quality low frequencies/sub woofer. I take this vibration in a very postive way, that way i get a good feel that my mini theatre's performance is very good. For that matter my recliner also in-directly rattles, which i like and i feel that is the way it should be, a complete movie experience, much better then a multiplex.

I have the ceiling a little slanting, it is not completely straight, which is good for the sound.

I have used glass wool on the walls backed with plywood, and then i have put sponge so that the feel of fabric is very good and looks rich.

I think it is not a good idea to put insulation rolls above the ceiling, because Armstrong tiles will do the job, and moreover if one is putting these tiles, then naturally one would go for the halogen and related lights, in such a situation to keep insulation's on the ceiling is not a good idea for safety reasons.

There is a talk by venkat and others that glaswool is not safe of which i do not agree, keeping in mind the things in general.

We are lucky that there will be good advices from santosh, venkat, audioengineer and others.

V.

 

[santhosh]

Mandeep,
Suspended ceiling will rattle unless the boards/tiles you have used are of high density. Anutone has a special tile just for ceiling and it works very well. The saint gobain ones that you posted on George's thread looked good. Go for that with two layers of glasswool on top of the tiles. First a layer of 50mm low density glasswool for mid and high frequency absorption and another layer of 50 to 100mm high density glasswool for handling low frequencies. Have atleast 4 inches air gap between the ceiling and the top most layer of glasswool. Make sure you use a layer of acoustically transparent glasswool cloth between the tiles and the glasswool, this will help prevent flakes from entering the room.

Yes, you can add glasswool for sound attenuation as mentioned ^.

 

[mandeep]

Hello Mandeep,


I think it is not a good idea to put insulation rolls above the ceiling, because Armstrong tiles will do the job, and moreover if one is putting these tiles, then naturally one would go for the halogen and related lights, in such a situation to keep insulation's on the ceiling is not a good idea for safety reasons.


V.

Thanks Vinay and santosh bhai,

Would it be good to put glasswool if we don't put any down lighters in the ceiling.

As santosh has pointed that i can use saint gobian gypsum perforated tiles model:fultone, these are heavy, with glasswool backing.

Saint-Gobain Gyproc India: Market leader in construction space for over 2 decades

In the above link the company itself says to use glasswool backing.

"Fultone:
This ceiling panel has full square holes in regular pattern and is backed
with a special non-woven lining. This range provides excellent sound
absorption properties with insulation mat.
Panel colour:
White
Standards
Noise Reduction Coefficient (NRC) : 0.80 (With 50mm Glass Wool
Mat Backing)"

what is "MAT" as in mat backing anyhow?

thanks

 

[govindp]

I saw some samples of Armstrong tiles in my office yesterday. They are highly impressive. I have bought Anutone ceiling tiles for my use already. If i had seen these samples, I had a lot to think about

Anutone tiles are heavier than Armstrong samples i saw. Hence, vibration must be a lesser issue in case of Anutone.

 

[mandeep]

hello friends,

Thanks, I will require your valued inputs constantly.

The work has started with Armstrong SILHOUETTE WHITE REVEAL 600mm CROSS TEE.

SiZE:600mmx45mmx15mm

The contractor advised to use heavy T-grid to avoid vibrations, so the above T-grid was the choice.

Will be using perforated SAINT GOBIAN tiles with 50 mm,16kg/m3 twigs glasswool above it. Is the density of glasswool ok or more density is needed like 24kg/m3?

I have requested the dealer of twiga glasswool to cut into 4'x2' peices and wrap the glasswool in the cloth i provided him, so that there is no need to cut that at home and avoid any health problems.

wall angles are being installed to the wall

rawl plugs fixed into ceiling, now installing cross tees

After completion of T-grid, wall studs are being fixed to the walls.

regards

 

[santhosh]

One layer of 50mm of 16kgm3 and second layer of 48kgm3 should be good. If it is not too late, get the ceiling and the t-grid to be black as it will be good for movie watching.

 

[santhosh]

The low density fiberglass is only required over the perforated boards as this will absorb reflections. On parts that are not perforated portions use only the high density fg for handling low frequency.

 

[mandeep]

One layer of 50mm of 16kgm3 and second layer of 48kgm3 should be good. If it is not too late, get the ceiling and the t-grid to be black as it will be good for movie watching.

Thanks buddy,

yes too late :sad:, they have already installed the T-grid.

First, lets see the overall effect/reponse of the room by putting one layer of 50mm,16kg/m3 fibreglass, if needed and my budget allow's me i will consider adding another layer of 48kg/m3.

cheers

 

[santhosh]

Good going mandeep:clapping:. Keep us updated via regular pictorial posts.

 

[vinay]

Hello Mandeep,

In event if you are not putting lights on ceiling tiles, sure it will be safe to put glass wool above the tiles but i do not know how will it help because how will sound penetrate the tiles and reach glass wool?

Santosh since you are active on this thread, please guide me on this keeping in mind that Armstrong tiles do not have deep perforation. About the other tiles which is being talked about, would they have such deep perforation to catch the glass wool and that too being wrapped in cloth.

Thanks.

V.

 

[mandeep]

Hello Mandeep,

In event if you are not putting lights on ceiling tiles, sure it will be safe to put glass wool above the tiles but i do not know how will it help because how will sound penetrate the tiles and reach glass wool?

Santosh since you are active on this thread, please guide me on this keeping in mind that Armstrong tiles do not have deep perforation. About the other tiles which is being talked about, would they have such deep perforation to catch the glass wool and that too being wrapped in cloth.

Thanks.

V.

hello

Thanks vinay, santosh.

The tiles i am using are Saint Gobian Gypsum tiles(not armstrong) 2'x2'

which have perforation in shape of full square holes in regular pattern and is backed with a special non-woven cloth lining, the non-woven lining/glasswool cloth lining is acoustically transparent and prevents glasswool from falling down.

The glasswool is will also be covered with acoustically transparent cloth for double protection.

I will route only the speaker/video cables only and then even in a plastic PVC conduit pipe.So there is no risk of electrical wires.

I have planned to cover the front half portion of the room with these tiles only and planning for simple diffusion or absorption for the rest half.The need to do this arises as i have multiple doors.With one door on the back back wall, that opens into the room.This door will not provide enough space margin for the studs to be fixed into the wall. As is clear from the picture below the said door(right next to the person standing in the picture) is the problem.

For this plan is to have an angled wooden wall studs along the wall covered by 2'x2' particle board tiles or particle board or plyboard.

members plz help/guide me with this.

regards

 

[vinay]

Hello Santosh,

Please be assured that suspended ceiling will rattle only if high volume is used and let us not forget that the rattle will be only on lower frequencies and moreover if one is going to use very high volumes, who is going to allow you to use it, your neighbours and your family will kill you and that is a another story that your ears will leave you high and dry and by the way, with very high low frequencies even routine things in the room which are at a height will start falling and vibrating.

In view to this please guide me.

V.

 

[unicorn]

@Mandeep
Thanks for this thread. I am also planning to get false ceiling done in my place.
How much are you paying for this?
I also plan to use the Saint-Gobain tiles

 

[vinay]

Hello Mandeep,

Well thank you so much for the pictures and writing, It is joy to see you on the right track.

V.

hello

Thanks vinay, santosh.

The tiles i am using are Saint Gobian Gypsum tiles(not armstrong) 2'x2'

which have perforation in shape of full square holes in regular pattern and is backed with a special non-woven cloth lining, the non-woven lining/glasswool cloth lining is acoustically transparent and prevents glasswool from falling down.

The glasswool is will also be covered with acoustically transparent cloth for double protection.

I will route only the speaker/video cables only and then even in a plastic PVC conduit pipe.So there is no risk of electrical wires.

I have planned to cover the front half portion of the room with these tiles only and planning for simple diffusion or absorption for the rest half.The need to do this arises as i have multiple doors.With one door on the back back wall, that opens into the room.This door will not provide enough space margin for the studs to be fixed into the wall. As is clear from the picture below the said door(right next to the person standing in the picture) is the problem.

For this plan is to have an angled wooden wall studs along the wall covered by 2'x2' particle board tiles or particle board or plyboard.

members plz help/guide me with this.

regards

 

[mandeep]

@Mandeep
Thanks for this thread. I am also planning to get false ceiling done in my place.
How much are you paying for this?
I also plan to use the Saint-Gobain tiles

hello Unicorn,

The tentative cost is Rs 60-70 per square foot for false ceiling including everything material, labour etc.

The above mentioned saint gobian Tiles are Rs 145 each.

Plz let me know if u want any other information.

Thanks

Regards

 

[mandeep]

Good going mandeep:clapping:. Keep us updated via regular pictorial posts.

Hello santosh,

Do you know the indian alternative to the gleen glue used by avsforum people for damping. That will be useful for applying on the metal studs before applying the tiles on them.So that there is no rattling of wall tiles after installation of tiles on metal wall studs.

Or

Should i glue thin rigid foam on metal studs , before installation of tiles. Is there a glue that sticks well to steel/metal.Does fevicol quick fix stics to metal surfaces?

thanks

Regards

 

[vinay]

Mandeep,

I am sorry to repeat again, please do not do the mistake by not putting halogen lights, such lights are a must, it adds a lot of grace to the room laced with a better feel of a theatre, later you can go for the dimmer options and more importantly you should have in-direct lights on corner of the side walls, so that you will have less strain on your eyes while movie watching, though with special movies, one can always shut all the lights. I use projector extensively so for me in-direct lights area a must. You can see the various light pictures in my signature.

V.

 

[santhosh]

There is no Indian equivalent of Gleen glue, also GG is very expensive even if you want to import.

I have used thermofoam of 8mm thickness as a vibration dampner which is a cost effective alternative. If budget allows you, go for neoprene.

 

[vinay]

Mandeep,

I have used plywood on the walls instead of tiles, and to tighten the ply and glass wool i have used iron wires, frames, screws, studs backed with wooden moulding of which i have spray painted and not used the routine polish on wood. By doing these things i have not faced any rattling, but then with huge volume towards lower frequencies, even our heart will start beating more. To have a clear view of the mouldings, please see my signature photo's.

I like the idea of using tiles on walls.

V.