Hi Mary, if this is not a exterior wall, you can put the faced material any way, it will not make a difference. The faced material is a vapor retarder for moister control and you need to face it out on exterior walls. Ret
Yes. This product can be used in 2x4 stud cavities.
Thanks for all your replies. I knew that I could not hope to achieve soundproofing, my limited goal was simply to get some level of attenuation in the propagation of the sound from the back of the speaker (or better the top in this case) by trapping those pressure waves into the air "bubbles" present in the isolation material. I had read in one of the too many websites I checked out that in terms of acoustic isolation R13 works better than R30, which fills the space too much. Unfortunately, unless I embark in a major project of complete ceiling restructure, I am limited to using whatever type of "acoustically isolating" material can be squeezed into the cavity through the speakers' mounting holes. Not sure if those tiles Happyhomeowner is referring to are such. Would foam baffles as those shown in the picture, placed atop the speakers, with maybe a layer of the Johns Manville R-13 fiberglass in between produce any better results?
Hello and thank you for your interest in Johns Manville Kraft Faced Fiberglass. This product is 3.5" thick which is slightly larger than the cavity space you will have in the 2"x3" walls. If the insulation is installed in this cavity you will have a reduction of R-value and no longer achieve R-13. The insulation is still effective when it is compressed, just not as much so as if it is allowed to expand to its full thickness. Ultimately, yes the product could be installed in 2"x3" walls, it will just not perform to its advertised R-value.
Hi Gina, yes for your climate you can use this product. You need to measure the center to center of your joist to determine the product to purchase( 16 inch cc you need 15 inch product, 24 inch cc you need 23 inch product). I sent you two pictures to show you the different size in my workshop ceiling. Ret
This product would help for acoustical performance in between bedrooms. However, the Kraft facing is not intended for interior walls. A better alternative would be an Unfaced Fiberglass.
Hi Babi, according to Johns Manville you do not need a approval number for Florida. You can also contact the Florida Building Association for more information. Ret
It didn't itch or irritate me....
Hi Fred, 2x4 walls can fir an R-13 or R-15 product. you would decide which one is best for your project by referencing the chart Energy star provides telling you the suggested R-value for the are you live in or by referencing local building codes.
This product is rated to be used in buildings. Please check requirements for insulation used in vehicles. Thank you.