Author Topic: Soundproofing Bedroom Ceiling ?  (Read 3774 times)

munchkin1

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Soundproofing Bedroom Ceiling ?
« on: October 22, 2008, 11:23:01 AM »
Hi,

Our bedroom is underneith our upstairs neighbours kitchen (with laminate flooring). We live in a Victorian conversion and there is no sound proofing. The problem we have is the ceiling is already quite low so we cannot afford to loose much head height at all. What would you suggest is our best way of soundproofing? We realise we wont be able to cut out all the sound but even a small reduction to take the edge off will make things easier for us.

Fill joists, layer of membrane over the top and then 1 or 2 sound proof plaster boards on the bottom?

Thanks in advance

:)

joel

  • Guest
Re: Soundproofing Bedroom Ceiling ?
« Reply #1 on: October 23, 2008, 04:57:02 PM »
It sounds like you plan to remove existing ceiling plaster, right?  If so, then 'fill joists' with insulaiton (bonded cotton is best for sound absorption and blocking, mineral fiber is next, and fiberglass is last), use MLV (Mass loaded vinyl) for the soundproofing 'membrane'.  As for the  'sound proof plaster boards' these are OK for blocking air-borne sound but they do not solve the structure-borne sound problem that started you on this project in the first place.  Use two layers of fire code plaster board with Green Glue damping compound sandwiched between - this will give you a 13-15dB drop in low frequency (impact) sound transmission at your new ceiling.
If you do not plan to remove the existing cieling plaster layer, then the blown in insulation will have to do.  Results are not nearly as good.  If you do blown in insulation then use multiple layers of plaster board with multiple layers of Green Glue between.  For info on Green Glue see http://www.soundproofing.org/ggpages.htm
and MLV is discussed at http://www.soundproofing.org/infopages/flooring.htm

munchkin1

  • Guest
Re: Soundproofing Bedroom Ceiling ?
« Reply #2 on: October 24, 2008, 12:53:19 PM »
Hi, yes I do plan to remove the existing plaster (should have said!).

Thanks for this info, will be very usefull.

Do you have any info or a link on the 'Fire Code Plaster Board'? I don't seem to be able to find any info on the net.

Thanks!!

joel

  • Guest
Re: Soundproofing Bedroom Ceiling ?
« Reply #3 on: November 07, 2008, 05:34:14 PM »
It's usually called "Type X' dry wall.  Phone a local dry wall supplier near you and ask them for what they call it.

 

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