Feb 16, 2021 6:36 pm
Just wanting to get some feedback on practicality/engineering issues and even possibilities here.
We will have 2 kids' bedrooms right next to each other. I'd like to give them the option of having their dividing walls as insulted as possible. Then a thought came to me which would have dual purposes.
Would it be possible to place sound proof insulation in the wall cavity at frame stage then add a 12-16mm layer of MDF on each side of the framed wall and THEN sheet with gyprock on each side after that ?
Would the MDF be too heavy for the frame ? I realise any electricals would have to be cut out through the timber then the gyprock and that the builder would have to come back to do carpentry work after insulation but would this be a good way to sound proof?
I also thought it would then be handy so when I want to hang anything on the wall later it'd be easier as I wouldn't need to always find a stud.
Or am I asking too much ?
Re: Insulating between two bedrooms3
Feb 18, 2021 4:23 pm
two layers of regular 10mm plasterboard is also ok, or one fibrecement sheet or similar. CSR has a red book with all the different options. Soundcheck is ok but might when you see the data is not the most cost efficient
Re: Insulating between two bedrooms4
Feb 18, 2021 5:02 pm
Brick or Hebel block wall +render would certainly work better than any of the gyprock + insulation based solutions. No matter how many layers of the gyprock you are putting in, main limitation will still be the construction of the frame and this is where steel frame will be winning over wooden frame, and brick or Hebel blocks will be winning over the steel frame.
One possible solution which will be better than brick - double metal frame with 2 layers of gyprock on each side with Green Glue compound in between them (with soundproof batts or better blankets in between). This will provide sound studio level of acoustic insulation (RTC of 65+), so your doors and windows will become the main bottleneck.
Re: Insulating between two bedrooms5
Feb 18, 2021 5:38 pm
Thanks for the replies so far. There was an advantage to the MDF which is that it allows me more timber for hanging later. This is why I dismissed thicker gyprock. Brick or Hebel isn't really an option as this is a volume off the plan build at a pretty much base entry level home.
We are considering square set ceilings...in which case I could always double up each wall later as I am not having to deal with cornice.
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Thanks, good news !