I am going to be doing an open joist ceiling in my studio, similar to what Doug F. did with his ceiling in the Real Traps video.
The joists will be filled with insulation(probably thermafiber) and I will cover the entire ceiling with some type of fabric and then trim with wood.
My questions for Ethan or anyone else: it was stated that Doug used Felt to cover the insulation. Did he put 2 layers? one felt for protection? and then one with acoustic fabric over top? or just one layer?
Do you know the type of felt and the thickness? Was it non flammable? I have some lighting to work around.
If he used a second layer of fabric do you know what he used? or can you recommend what will work best?
Great plan! I can't remember what Greg used for insulation but for over 8" thick, save your money and use fluffy fiberglass. You may need to use wires to help support it, but you will need some support for thermafiber too. Actually, now that I think about it, if you buy Kraft paper or foil backed, you can use the edge "tabs" to staple it up the floor above to help support it. I may be talking out of school but I don't know if the felt is necessary acoustically or just as a cosmetic covering.(I should re-read the article:( An alternative covering is speaker grille cloth that you can get in bolts of 70" or so widths: it's probably best if it's flame rated and if you look around, you'll find it. LED lighting is pretty cool (temperature wise) but if you are concerned, buffer the light bezels with a few inches of drywall or something. You should not need 2 layers; too expensive.
Thanks for the response. Yeah, I'm not sure if Doug used two layers of fabric or not. I'm a little concerned and want to block any insulation fibers from getting into the air, so that's why I was thinking maybe a layer to cover the insulation for protection and then an acoustic fabric layer for cosmetic appearance. Maybe Ethan will see this and chime in. If anyone knows anything about what fabrics are non flammable that would help too.
I just have my panels half covered with muslin. In fact, the backs are exposed - even on the fluffy super chunks. No problems so far.
Anything will burn if you apply enough heat. That being said, there are ways to treat fabric to decrease its flammability. Just use common sense and best practices and don't put cotton next to an incandescent bulb, smoke, or just switch to LEDs.
Thanks Hexpa, yeah, I'm probably being a little over cautious. The fact that it will be the entire ceiling full of insulation and the gravity factor is the reason. I'm not as concerned about the wall panels, although I have seen that some people have double wrapped them with different types of inner material options. Anyway, I will need to make a decision either way soon. My basement is torn apart and waiting...ha ha
If you really want to go with a double layer, a cheap under layer (first layer touching the insulation) is economy landscape fabric. It comes in rolls 3 feet wide x long lengths like 50 ft etc. It's a non-woven fabric. I use it for my panels cause it's cheap! Since it is not totally opaque, I double it up in the front for cosmetic reasons and it works. One of these days, I'm gonna make nice looking panels with that stretchy grille cloth stretched over and stapled to wood frames but for now...I'm on the cheap
I'll add that even with one layer of the cheap stuff keeps the fibers in.