Soundproofing Ceiling?

[Colonel Burton]

Mods if i've posted this in the wrong place please move to correct forum.
Hi all what it is, is i've moved house a few months ago got my gear setup in the living room but our bedroom is bang above and all i can say is that the tv sound alone can be heard quite easliy just think whta it's like when i put a film on through the amp anyways i've been in touch with Sheffield Insulation's and they have come back with the stuff i would need to help soundproof it please find list below

5 Packs Rocksil RS45 insulation £47.75 each
6 no 8x4x12.5mm Sound Block Board TE £9.68each
Drywall screws £8.50 box
Fibre Tape £2.04 each
Joint Filler 10kg £14.48 bag

Delivery £15.00 all + vat
Total £395.80


ok two things here will this lot really help in a big way and is the cost about right for that stuff thanks for reading.

[mattym]

your missing the price for making the frame this lot goes into and onto, either battening or some sort of steel C section, and i would look at more soundproofing materials to go between plasterboard sheets

[Jon Boy]

Yep , if you're going to use rockwool / rocksil you will ned to create a cavity in which to put the rockwool!
Ring back sheffield insulations (nice people im up there all the time) and enquire about an MF frame system. Its easy to put up , you can put your rockwool inbetween and the fix the boards to the frame!

As for the prices they seem very reasonable considering the book privce for a soundbloc board is £17! Theyve given you a good reduction there!

Dont forget you're going to have to pay for a jointer to come in for a day to joint it (reakon on around £150 a day labour) and if you're not building it then you'll need someone to put up the mf frame section (reakon again on £150 a day for the labour)

MF...

You'll need some MF6A , its a 'c' shapped metal channel which runs down two sides of your room (the opposite way to your ceiling joists) oncve fixed in place you'll need some MF5's these slot inbetween the MF6A and run the length of the room at approx 400mm centres! Next put the rockwool between the MF5's and then you can board it , remembering to stagger the joints!

I wouldnt use rockwool / sil with the existing plasterboard and the new soundbloc on top this should give sufficient soundproofing and would mean you wouldnt need the MF frame section!

All in my opinion of course!

Feel free to pm me for any advice you may need

Jon

[Colonel Burton]

Sorry guys ment to say i will be ripping the old ceiling down (plasterboard) and filling 170mm gap between the void with the RS45 thencovering with the blueboard so no frame needed, would that be the right way to go about it?
hope that clears things up abit

[Jon Boy]

Afternoon colonel , to be honest mate id leave that plasterboard up there and go with the MF idea i was saying about. It would be a lot easier and a lot less messy and dusty lolol I would guess it wouldnt cost much for the metal work , maybe £20 - £50?
The sound proofing will be better as you would have two layers of plasterboard up there (the existing and the new soundbloc) , plus if you went with the MF it will create a small void where the rockwoll can go and also is very handy if you plan to fit down lighters or run wires / av cables across the ceiling!

If you go with ripping the old ceiling down one advantage is that the void will be deeper and you can use thicker rockwool so it will still work. You may also consider when ripping down the old plasterboard to put a layer of normal (cheaper) plaster board up and the go over the top of that with soundbloc. A bit more work and cost but it would make the sound deadening even better!

Keep us posted matey

Jon

[Colonel Burton]

Cheers Jon, think i will go with ripping the old ceiling down should be starting it next weekend so i'll try to get some pics before during and of course the co*kup afterwards lol

[Jon Boy]

Good luck with it mate , make sure you have 2 pairs of hands , those soundbloc boards weigh a ton! Cut them using a stanley knife , score it 2 or 3 times then snap it and knife the back! If you have to cut round anything buy a small pad-saw and use that!
Don't forget to stagger the joints or the joints will crack over time!

Good luck!

jon

[jrussell26]

I am also looking to soundproof my living room ceiling and have seen some soundproofing material in Wickes which is about 1 inch think and looks like it is made from a fibrous cardboard type material.

Does anyone know is this can just be laid directly between the joists on top of the plasterboard, or should I build supports between the joists so that it is not lying directly on top of the plasterboard?

[mattym]

i dont know about the material you mention there, but a layer of GreenGlue between soundboard will increase the effectiveness of the assembly greatly

[mallet]

Where can I get hold of Green Glue - any uk stores yet?

[.borg]

One of the problems of sound is that it travels up through the walls and through the floor joists. To fully insulate against this you would need to have a box-within-a-box construction like recording studios or cinemas, where the inside walls are isolated and not the same as the outside walls.

However, unless you have a bank balance the size of a small country's economy this is also the most impractical.

You can reduce the airbourne sound by the means you specified, but try to make the new ceiling frame independant of the existing ceiling (leave it intact as it adds dead weight which reduces air bourne sound). Try to install new joists spanning from wall to wall and not screwed to the existing ceiling. Using green glue as mention by mattym is a good solution to isolating the sound waves within the room and taking a look at these websites will give you much much more information which you can adopt or ignore depending on your bank balance.

http://www.audioalloy.com/ are in the us - read info here
http://www.rpg-europe.co.uk/ is the uk supplier/distributor of green glue

good luck

[Colonel Burton]

Well almost finished, couple of bits of board to put up then plaster time BTW Sheffield Insulation's way under estimated on the rocksil by about four bags d'oh

[sunama]

Any news on your project? Im going to be getting my ceiling done very soon and im still scouting around for ideas.