DIY Home Improvement, Remodeling & Repair Forum > DIY Home Improvement > Insulation and Radiant Barriers > Cellulose insulation in basement ceiling




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Old 03-30-2014, 08:13 PM  
diynewf
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Default Cellulose insulation in basement ceiling

Hi,

I'm new to the forum, and from the articles I've read here it seems like a nice place to discuss renovation issues. I bought my first home six months ago in an older suburb in town. The house itself is 35 years old and has a basement apartment underneath. I live in the apartment and rent the upstairs bungalow. The last tenants that live there had small kids and I found it to be really noisy upstairs because of the hardwood floors. I read that cellulose insulation provides an excellent sound barrier. I know soundproofing an old house is likely an impossible feat so I wanted somehow to dampen the sound coming from upstairs. I hired a contractor to add dense pack blown in cellulose to both the walls in my basement and the ceiling. At $2 sq/ft the ceiling cost roughly $1500. I wanted to get the walls done anyway as a thermal gun proved there was little to no insulation in the walls and my power bills were higher than normal. I opened up the ceiling above my hallway to do some minor electrical work (adding new lights) so currently this space is wide open. I purchased some Roxul Safe and Sound insulation to cover that area and to finally layer it with drywall. I did a few tests upstairs by playing a song on my cell and laying it on the floor in one of the rooms but disappointly, I could still hear it clearly from downstairs. Is cellulose in the ceiling a complete waste of money for this purpose? I have the contractor coming back on monday (haven't paid him yet) so he can explain to me exactly the sounds this is supposed to block and I want some sound tests. I know it wouldn't stop impact noise from footsteps but I at least wanted conversations to be muffled out as well as ambient sounds. There are no tenants upstairs at the moment so I can't do a very accurate test. Regardless if this proves effective or not I am eligible for a rebate on the ceiling insulation so that makes me feel a little better. Will the insulation also provide greater energy efficiency if nothing else? Thanks.

I apologize if this is discussed in another thread. First time here


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Old 03-30-2014, 10:02 PM  
nealtw
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Welcome to the site. And cogrates on the house with an income suite. A layer or two of roxal or fibreglass will work fine for most noise. With a suite upstairs you ceiling should be 5/8 drywall and a second drywall would help two. There is a product called I think green gew that you can put between layers of drywall for noise also. No pot lights down stairs. Unless you have seperate heat for down stairs you will not have a saving.


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Old 03-31-2014, 05:06 AM  
diynewf
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I've already had contractors to blow dense pack cellulose in the ceiling so will that make any noticeable sound difference? I'm having them visit today to perform a few sound test because I want to make sure I'm getting my money's worth.

Another option I had in mind is to put another layer of drywall on top of the old and put resilient channel between the two pieces. Was only going to install in the living room and bedroom only as these are the most common areas.
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Old 03-31-2014, 07:07 AM  
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I think you will have taken care of most of the noise with that plan.
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Old 04-03-2014, 01:30 PM  
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So I've not wasted money with going with the cellulose route in this case?
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Old 05-14-2015, 07:23 PM  
diynewf
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Sorry for reviving an old thread, but the cellulose installation that was installed in my basement apartment ceiling doesn't do much for blocking impact noise from the floor above, or eliminating loud sounds such as music being played. I paid $1300 to have this done, but received a $260 rebate from my utility company, so $1040. Will having insulation in the ceiling benefit the R value of my apartment, or will the return on investment for this job be negligible?
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Old 05-14-2015, 07:52 PM  
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Unless you have seperate heat the insulation between the floor and ceiling won't save any money.
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Old 05-14-2015, 09:53 PM  
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I do have separate heat. It's a 2 unit house.
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Old 05-14-2015, 10:20 PM  
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Then yes your heat will be slowed down and that should save you some on the heat bill.
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Old 05-14-2015, 11:18 PM  
diynewf
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I read on some other forums that the energy savings is negligible, because the basement ceiling should only be insulated for the purpose of soundproofing, which I thought I was doing.

I thought it would be a lot more expensive to tear down and decouple all of the ceilings, but maybe that was the only way to achieve the soundproofing I wanted.

Impact noise is the worst in my house, and I thought insulation was the way to go to diminish some of the noise.

I guess the cellulose was a waste of money


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