Doubling up... 8 inches of 4lb Mineral Wool?

[DaVinci]

I got 60 sheets of the stuff today, and it's stiffer than I expected. I had planned to build basic frames, etc... but it's so very much easier to just stack two sheets on top of eachother, and they reach the ceiling... so I will, by tomorrow, have blanketed the walls and ceiling with 4" all around. I am still figuring exactly how much additional corner bass trapping I can do... but Ive got a lot of material and a little room, so Im wondering...


Room is 10' 7" by 10' 7" square with 8 foot ceiling...

I had originally been planning on hanging a few inch gap to walls, but it was much more difficult... Since I am covering everything, it was very difficult to do superchunks plus entire walls offset from actual walls by a few inches... MUCH easier to blanket existing walls, build superchunks touching that...

I have plenty left over... what about just going 8" deep on back wall?

I haven't done ceiling yet... what about going 8" deep on ceiling (floor is carpeted if that matters.) vs doing 4" with 4"gap. That would also solve a problem for me about a few wall/ceiling joints that are gonna be difficult to trap... because they would at least have a solid 8" that the whole ceiling has...

Read every post I could find on here... basically seem to be saying thick is better than gap... but not always depending on density, etc...
so I'll be specific...

I have 4lb mineral wool already purchased, and plenty of it... in 4 inch thick sheets...

Should I go 8 inches on back wall? 8 inches on ceiling? Still suspend ceiling?

[drummerboy1533]

cut 12 sheets into 4 triangles for rear superchunks.Cut 6 sheets into 8 triangles for front superchunks.Use 2 sheets ea for 8 wall to ceiling straddliing the corners.Use single sheets for RFZ ceiling cloud with equal air gap.Use 2 ea for RFZ sidewall pnls.You can fit 3 doubled traps on rear wall and just single panels on front wall.You have now covered all IMPORTANT spots.Face traps with FSK in non reflective areas if possible.A square room aint the best place to use...

[Glenn Kuras]

I have plenty left over... what about just going 8" deep on back wall?

If you can go for it.

I haven't done ceiling yet... what about going 8" deep on ceiling (floor is carpeted if that matters.) vs doing 4" with 4"gap. That would also solve a problem for me about a few wall/ceiling joints that are gonna be difficult to trap... because they would at least have a solid 8" that the whole ceiling has...

Solid will do better but only if you have all ready covered all corners. Hitting the corners will be much better then 8" on the ceiling.

[DaVinci]

Well, corners are covered... in fact, I'm having to go back and do smaller triangles... since plan was originally to do superchunks against corners and then have hanging panels a few inches off walls...
well, now that all walls are covered directly, there is already 4 inches going each direction in each corner.

Now, I'm thinking maybe superchunks may be overkill (and hard to mount) at least on upper edges. Take front wall to side wall corner... it now has 4 inches attached to either wall... I could go ahead and put a superchunk there as planned. It would have to be smaller (17x17x24) because original plans didn't account for 4 inches to have already been on each wall...

but... If I already have 4 inches on each wall, and am putting a 4 inch trap straddling... that's already at least 8 inches of mineral wool at every point in that corner... maybe the superchunk is overkill in this case... it certainly would be a lot easier to just mount panels.

What do you think? If walls already have 4" everywhere... is superchunk really much of a benefit vs ANOTHER 4" when soundwave already has to go 4"trap---airgap---4"more before it hits corner (actually a bit more than 4" technically since it's going diagonally) 4lb density if that matters.

One way or another, tho... corners are being WELL taken care of... all along ceiling... along floor in front... most wall to wall corners...



So... am I hearing right that it's best to float ceiling anyway vs 8"? If so, why?

There are 2 sides where space limitations mean I can't do much with wall to ceiling on those sides... and I was planning on doing sort of tent treatment coming from center of room to cover ceiling... so what about just making ceiling 8" all around edges? That would at least be 8" in those spots where I can't straddle a panel at the corner.


Also, the room is square side to side, but not a cube cuz different ceiling height... so is there another benefit to doubling back wall to 8" in that it helps maybe unsquare it a bit? I'm assuming back wall would be first choice to double up anyway since speakers pointed right at it, but not sure that's scientific.

thx.

[DaVinci]

... or would ceiling be better choice than back wall for double thick since floor is carpeted, so only highs caught there?

[Glenn Kuras]

So... am I hearing right that it's best to float ceiling anyway vs 8"? If so, why?

No solid is better but what I was saying was using that 4" of material to cover more corners. It sounds like you went to town on the corners so us 8" up there or use 8" for the back wall. In fact not sure what you have on the back wall and if less then 8" then that is where I would use the extra.

so what about just making ceiling 8" all around edges? That would at least be 8" in those spots where I can't straddle a panel at the corner.

Not a bad idea either.

Now, I'm thinking maybe superchunks may be overkill (and hard to mount) at least on upper edges. Take front wall to side wall corner... it now has 4 inches attached to either wall... I could go ahead and put a superchunk there as planned. It would have to be smaller (17x17x24) because original plans didn't account for 4 inches to have already been on each wall...

Filling the corner is always nice as it hits 50hz area pretty well, but you have a ton of stuff already so something tells me you are absorbing that low.

[DaVinci]

ok, thx... 3 walls up so far...

Actually, I have slight problem with door at 8 inches on back wall... so thinking I'll do a couple big panels to double up where possible on back wall.

Still haven't figured out how to hang superchunks on wall ceiling joints, so prolly do superchunks on two available floor to ceiling runs, and straddle panels after blanketing walls and ceiling for others.

Still looking into how to mount ceilig panels... a ceiling full of 8" if it goes that way will be heavy... maybe mount first round directly and hang second with wires running across room?

Filling in all areas behind doors, etc... so at least 4" everywhere anything meets anything.

[localhost127]

im also interested in hanging superchunks on the wall/ceiling boundary.

let me know if you come up with a solution (i'm still a ways away from attempting this..got other priorities first)... but i have concrete ceilings and if i could do the entire length/width of my room with superchunks/corner trap in the ceiling/walls slot...that would be very beneficial.

[DaVinci]

Well, we'll see... I may skip the superchunk bit in upper corners... trying now to build lightweight plastic perforated frames to exact dimensions in order to trap all upper edges... still working... it'll be straddling type tho... walls and ceiling already covered, superchunks going up in 2 corners...

I must say, tho... tried dropping ceiling, and... hmmm... just not sure... I only have 8 foot ceiling to begin with, and it's getting claustrophobic... may just do 4" attached to ceiling in center and 8" toward edges... then radiate fabric out and do the tent thing... still seeing.



I also have a TON of bamboo... so after all is said and done, I may end up adding some random bits of bamboo to the less critical areas... give just a bit of life ( not to mention breaking up the endless sea of fabric that will need to cover all this )... Certainly will keep bamboo away from all critical areas for recording and monitering, tho.

[PaulP]

This huge thread show ways of putting insulation just about everywhere : Mark's Studio Build Diary

Paul P

[DaVinci]

Originally Posted by PaulP

This huge thread show ways of putting insulation just about everywhere : Mark's Studio Build Diary

Paul P

One of many threads I read before I got bought the mineral wool... thx tho.

At the end of the day, I'd love a large luxurious control room with an epic 2 story skyline type custom diffuser based upon the largest prime number known to science, etc...

But after MUCH deliberation, the reality sets in that I'm in a tiny box, and whatever I make WHILE in that tiny box is gonna have to pay for a bigger box. That tiny box happens to be square, have a low ceiling, and be carpeted.

I'm gonna push the envelope on the corners until it gets too claustrophobic... maybe add a couple bamboo wall sculptures to break things up (visually too) in non critical areas, and possibly look into a particular resonator or diffuser if there is a discernible and potentially fixable problem after all that...

... hopefully, tho... I'll forget all this stuff and start focusing on actually making music again.

3 walls and ceiling are blanketed... 1 superchunk is up... and there's already a huge difference.

Next, gonna see if I can make my own recoil absorbers... since that budget's gotta go for a new preamp.

one step at a time...