|
Post by eurasian on Apr 4, 2017 13:11:06 GMT
Hello, All
I recently started a thread about using my entire basement ceiling as a bass trap. Many of my questions were answered, but I have at least one new one: If used to a depth of at least 12", would blown-in insulation work as well as the equivalent thickness of "fluffy" or 4" of 703 + 8" of fluffy with a 12" air gap above?
I was reading some of the older threads and came across a reference to hardware cloth for use with ceiling clouds and thought this used with a fabric cloth and thick blown-in insulation might be a much more economical way to achieve absorption than 703 or/and fluffy -- and in my case, the installation would be much easier, too.
Thanks for sharing your thoughts,
eurasian
|
|
|
Post by Ethan Winer on Apr 4, 2017 21:25:18 GMT
I think there are a few types of blown-in insulation, but I honestly don't know how they vary. I imagine you could ask the manufacturer for absorption specs and compare that to fluffy fiberglass.
|
|
|
Post by eurasian on Apr 4, 2017 21:33:38 GMT
Is there a minimum density I should ask for?
|
|
|
Post by rock on Apr 4, 2017 22:22:05 GMT
Simply from the practical handling aspect, I would think working with blow is a bad idea. Even if blow in ends up being acoustically acceptable, it has a tendency to settle over time reducing it effectiveness. I never did a cost comparison with fluffy vs blow in so it might be cheaper , even so, if it were me, I'd probably avoid it.
I use the hardware cloth idea to support frameless 4" thick mineral wool clouds suspended below a drywall ceiling. IIRC, you are using a grid type ceiling. If that is the case, hardware cloth is probably overkill to support fluffy as you could probably get by with thin wood slats spaced about 12" or so. Whatever you do, you will need to experiment to see what works best with the least expense.
Cheers, Rock
|
|
|
Post by eurasian on Apr 4, 2017 23:35:06 GMT
Hello, Rock
Not using a grid ceiling, but removing sheetrock from joists 16" on center. I have a 24" intersticial space to use for bass trapping. The highest density fiberglass blown-in I have found is 2.2 lb/cubic foot and has an R value of 50 or so at 12" depth. Please help me compare this to rolled fluffy.
|
|
|
Post by rock on Apr 5, 2017 0:24:21 GMT
I'd contact the manufacturer for acoustic properties. Did you compare the cost per unit volume? How does that compare? But do you really want to goof around with blowing insulation?
Cheers, Rock
|
|