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How to cover an entire ceiling in 703???
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Old 9th August 2012   #1
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How to cover an entire ceiling in 703???

I read that Ethan suggested covering an entire ceiling in 703. I have a couple questions on this.

1. What is the most cost effective way to attatch panels of fiberglass to a drywall ceiling? Especially with a 2" air gap?

2. Will 6" Roxul Safe and Sound be a good subtitute for this application?


I was thinking of using the lightweight steel studs and and framing a new ceiling about 8" down, then stuffing in the panels and covering the whole thing with painters drop cloth that I can easily dye.

I would need a ton of steel studs at $6 a peice. Is there a better way to do this?
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Old 9th August 2012   #2
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Anyone have any insight on this?
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Old 9th August 2012   #3
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In my situation we have 80mm thick rigid glasswool panels which have a woven glass covering bonded to the surface on one side and over the edges (these are specially designed for use on basement and underground garage ceilings). Each panel is held to the ceiling by a plastic anchorbolt (with a wide 4cm flathead) driven into a predrilled hole into the concrete.
I have heard styrofoam tile cement (also PVC cement) can also be used.
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Old 9th August 2012   #4
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Install a standard suspended ceiling track at the desired height - create your own ceiling tiles using the product wrapped with FR fabric finish....... add some fluffy fiberglass over the rigid for even more efficient absorption.
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Old 9th August 2012   #5
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2" 703 with a 2" airgap isnt going to go very deep.

Going with what Rod said, adding say 6-12" of "fluffy" above the 703 will probably get the job done though.
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Old 9th August 2012   #6
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is this for soundproofing or to keep the heat out?
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Old 9th August 2012   #7
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Quote:
is this for soundproofing or to keep the heat out?
ummm, rigid fiberglass or batt insulation does little for "soundproofing" when used as a treatment facing into a space.

Used within a 2 leaf system such as a wall, it does dampen vibrations in the panels. As to keeping heat out...well, it will perform that function. Whether by intent or not. However...it does it in reverse as well...ie...keep the heat IN.
This is why recording spaces need ventilation and or HVAC as required. Which brings up an oxymoron...ie...AIRTIGHT STUDIO.
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Old 10th August 2012   #8
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This is strictly for absorption. I was thinking of using 6 inches of Roxul safe and sound, with a 3 inch air gap. So the standard drop ceiling would be the most economical way to go huh?
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Old 10th August 2012   #9
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Personally - if you can only give up 9" of space I would opt for 4" of 3pcf rigid with R-19 fluffy insulation filling the space to the ceiling.....

And yes the ceiling track is the most economical approach -

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Old 10th August 2012   #10
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Thanks Rod. I can do the fluffy stuff, but wouldn't the Roxul Safe n Sound be adequate for the rigid paneling?

Also, to save money, I was thinking of using landscaping fabric instead of acoustic fabric. The stuff looks pretty good. Any reason why I shouldn't???
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Old 10th August 2012   #11
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Landscape fabric... Michael Wagener's "secret" recipe for absorption coverings!

By the way, "acoustic fabric" can be any breathable fabric, but you're best to go with something that will resist flame. I remember reading about flame tests on the landscape fabric showing less than promising results for flame ******ation. (re-tar-dation)
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Old 10th August 2012   #12
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Batt stone wool could tend to flex more in an overhead use than OC703. You might have difficulty getting it to stay put in a drop ceiling frame over time.

Landscape fabric can be used---but check the flame resistance first. Also, landscape fabric might give off more toxic fumes than a cloth based fabric if you had a fire because of the man made materials used in landscape fabric. Those materials are great for being resistant to rotting when used in landscaping. But maybe not so great if exposed to flames.

Last edited by 2manyrocks; 10th August 2012 at 09:00 PM.. Reason: used Rockwool incorrectly-corrected to batt stone wool
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Old 10th August 2012   #13
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Well I am actually thinking of building the drop ceiling with wood. I don't think the metal will hold. OR I could use steel studs.
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Old 10th August 2012   #14
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Quote:
Originally Posted by 2manyrocks View Post
Rockwool would tend to flex more in an overhead use than OC703. You might have difficulty getting it to stay put in a drop ceiling frame over time.
Which Rockwool product are you refering to? Rockwoll is the name of a company, same as Owens-Corning is. They both make a wide range of products used in recording studios.

Andre
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Old 10th August 2012   #15
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Originally Posted by Tango4Cash View Post
Well I am actually thinking of building the drop ceiling with wood. I don't think the metal will hold. OR I could use steel studs.
Hmmm........ which part of "this would work" did you not understand? I couldn't care less what you use - but I do find it offensive that you think I would suggest something to you that would not work due to structural issues, I actually do this for a living.

You asked for an inexpensive solution to your problem and I provided one - what in the world would make you think I would suggest that approach if it would not work?

I have used standard ceiling track in numerous studios where it helped the owner reach budget - and it might surprise you to hear that none of them have come back to me and said the ceilings collapsed because the track could not support the weight.......

As far as the question of the Roxul Safe n Sound - it's a bit light for me at 2.5 pcf for the application you're talking about here - which is why I suggested 3pcf......... however not a sticking point for me.. simply a suggestion.

Good luck in your endeavors,

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Old 10th August 2012   #16
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Quote:
Originally Posted by avare View Post
Which Rockwool product are you refering to? Rockwoll is the name of a company, same as Owens-Corning is. They both make a wide range of products used in recording studios.

Andre
I meant rockwool in the generic sense (not brand specific) in comparison to compressed fiberglas board.

Plus, I wouldn't want any mineral wool insulation over my head, personally.

OP might find this of interest: Is Roxul Safe and sound a good alternative to 703?

The idea of using a drop ceiling for this purpose--is one that just might work for my own situation. Thanks.
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Old 10th August 2012   #17
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Quote:
Originally Posted by 2manyrocks View Post
I meant rockwool in the generic sense (not brand specific) in comparison to compressed fiberglas board.

Plus, I wouldn't want any mineral wool insulation over my head, personally.

OP might find this of interest: Is Roxul Safe and sound a good alternative to 703?
2many,

The generic terms are either mineral wool, rock wool or stone wool (depending on what one is talking about) in either case the 2 words do not join together. Rockwool is manufacturer specific as mentioned above by Andre.....

Rod
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Old 10th August 2012   #18
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My mistake. Thanks for explaining the difference.
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Old 10th August 2012   #19
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I have used standard ceiling track in numerous studios where it helped the owner reach budget - and it might surprise you to hear that none of them have come back to me and said the ceilings collapsed because the track could not support the weight.......
Hey Rod, just saw this. I think there might be another consideration..but you tell me..ie...TRUSSES? I had already typed my reply in notepad and don't wanna retype it. Ok...so read this and tell me what you think. Actually, I have a few other ideas, because basically, I "don't think" he has enough room to actually insert 4" thick panels into a grid system. Even inserting standard acoustical tile panels takes some room above, but 4"? Sounds like a PITA to me. That's why I offer this.....and please, this is only in regards to my propensity for ...well...DIY.



Quote:
So the standard drop ceiling would be the most economical way to go huh?
I think it depends on how deep your pockets are.

Personally, I couldn't afford to hire someone to install a dropped ceiling grid. I'd have to DIY, which I've never done. But I've tackled tons of projects that "I'd never done" before and they turned out just fine. So yea, it "seems" like the most economical...that is...unless you see a different way to hang a complete ceiling full of panels.

Of course, you have to look at the inherent problems too. Like...wrapping X number of 6" thick panels sufficiently tight so the fabric doesn't sag. And then, installing 6" thick panels into a 8-9" deep space, with wire hangers all over the place..and THEN, wrestling batt insulation into the gap above the panels...er...did I mention..arrrrgggggg. Personally, sounds like a real PITA...but that's me. Who knows though. You might think it's fun.

And btw, common sense dictates, if your existing ceiling is drywall over ceiling joists, the hardware that the wire hangers hang from, would have to be fastened through the drywall into the existing joists. This means, unless you want the existing joists to dictate the grid pattern, you need to hang the support rails(the continuous long rails) perpendicular to the joists. This insures the joist spacing doesn't dictate the 24" width requirement of the metal grid, as you can hang the long rails at any point along them, vs if you hang the long rails parallel with the joists, if the joists are 16"oc...well, you might get my drift here. Just a heads up so to speak.

Another thing to think about, although I'm not neccessarily saying it's a problem, but I thought it might be worth mentioning. First off, you didn't describe what the existing ceiling construction is. Is this a basement? If so, is the ceiling already drywalled or is it exposed joists? Or is it a standard residential ceiling? If so, is there a floor above, or a roof. Makes a big difference. If this room is standard residential ceiling with roof above, you might wanna check whether or not the construction is rafter/joist or trusses.

The thing is, this entire proposed ceiling assembly will NOT be light as you think. Depending on the size of the room, if the roof support system is trusses, there are other considerations, as from my understanding, you may NOT want to hang a fairly heavy assembly from the bottom chord of a truss. From what I've read, some truss systems are designed to "float", where even the connections to partition walls must allow movement in such a way it doesn't crack the drywall. Now, I'm speaking from a NON expert status here...hopefully...Rod can chime in on this..if need be. It's just another heads up..so to speak.


On the other hand, there might be a few alternatives. But only you can weigh the cost/labor/DIY/PITA benefit ratios per an existing construction standpoint. I think if it were me, and I only had DIY considerations, and it isn't a TRUSSED roof situation, I'd probably opt for custom building/installing a custom grid that was strong enough to span the room in a larger grid, like 4'x4', or depending on room SIZE, maybe even 4'x 8' with as few wire hangers as possible. And I can think of two or three ways to do it..if it were me. Of course..you skillsets, tools, experience etc carry a lot of weight here.

The thing I'm thinking here is...installation ease by virtue of sequence. In this case, I'm "thinkin" ...CHEAP...EASY TO BUILD...EASY TO INSTALL by sequencing the hanging of custom built MODULES.

If you want some more input on this..just holla. Otherwise...good luck with your decisions.

1. Predetermine hanger requirements per span of longest members by virtue of weight vs deflection of chosen material/profile design.

Note, this is precisely why commercial grid systems are economical, as NORMALLY, you can install the system easily and cheaply. Unfortunately, in your case, the given gap/wire hangers will make the filler materials difficult to install...in my view only.

2. To my way of thinking, once the hanger grid spacing is established I'd probably mark off the grid on the ceiling, and then install the wire hanger hardware at the appropriate points. Usually, these are clips that fasten to the existing ceiling system..what ever it is. You might even be able to use simple eye screws..or equivalent...ie..what ever works for ya.

3. Once the hanger hardware is installed, this is when I would fasten the batt insulation to the existing ceiling, using staples, plastic straps or whatever.

4. Assuming you've already cut your absorption material to appropriate sizes to fit whatever grid you've chosen, and by virtue of the grid member profile, you might be able to hang a "module" of the grid, insulation already installed into the module. This would allow you to hang a series of modules and level them up individually.

5. Depending on your chosen grid style/member material/profile..to my way of thinking, if you chose POST fabric installation you could now staple squares or full room length/module width pieces of fabric to the frame members, and then install finish trim.

Note. Depending on you DIY skillset, design and fabrication level, you might want to think about whether your design/installation sequence would allow for PRE COVERING the insulation...or POST installing fabric...ie...you MAY want the grid members to allow for POST fastening..ie..staples into wood with some kind of finish trim..or not. Depends on various factors, your easthetic concerns notwithstanding. OR..you might even PRE install the fabric on the modules too!! It all depends on your ultimate goals. Usually, mine are ease of installation. I hate getting in the middle of an install only to find out I DID'NT think of something that stops me dead in my tracks.

Well, I'm outta time and theres a lot more to detailing a system like this. If you want to know more...just holla, although I think Rod would probably roll his eyes. But his pockets are probably deeper than mine.

Here is what I'm talking about.,





That's all the time I had for.
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Old 10th August 2012   #20
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oops...somehow I left this out. Again, if it were me, I'd buy Knauf 4" thick 4'x10' panels of rigid fiberglass 3lb density, and cut them myself, as if you build a grid 24"x ?, the frame members dictate a smaller panel size. This is what I bought for my own studio.

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Old 10th August 2012   #21
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Dang...forgot this too. I'm thinking...those modules are built using 6" wide strips of 1/2" plywood. If you need longer pieces than 8', "I'd" machine a half-lap joint on the ends and glue/screw them together. Then build simple boxes. Add another 1/2"x1 1/2" cleat on the bottom edge to form the "T" flange. This gives you something to fasten fabric and finish trim to. But there are a lot of different ways to do this. This is the first thing that came to mind.

But like I said...I LOVE DIY.
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Old 11th August 2012   #22
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Pitch........ the mains run at a right angle to the joist - so there is no issue with grid layout.

In a 12x12 room - material pricing from Lowes - not bothering with tax - just a quick look (and not accounting for anything other than just the plywood needed to accomplish the work)

4x8x1/2" plywood sheathing - yield for 6" strips to laminate 1" thick members would be 32 lf per sheet - you would need 7 mains (at 12') plus 4 cross mains (at 12') for a 2x4' grid per your design - cost per sheet at Lowes is 20.75 - cost per 12' main is 7.78 - total plywood cost is 85.59 for the raw materials to create the grid.

The same ceiling frame for that room using 12' main runners (5 ea @ 5.83)) 2' cross tees (12 ea @ 1.28) and 12' seamed angles (4 ea @ 4.28) is 61.63 for the raw materials.

The wire to support the ceiling in the field would be roughly the same in either case -

if you wanted to use wood trims you could still actually hang the fabric beneath the track and fasten wood trims through the track and angles to achieve the same look with no additional fabric required......

looks less expensive to me.......

Rod
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Old 11th August 2012   #23
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From an ease of construction viewpoint, there's nothing much easier than attaching a C track to each wall and then sliding in a metal stud.

I haven't priced lightweight metal studs lately and don't know the room span. Are lightweight metal studs $6.00 each now?
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Old 11th August 2012   #24
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Here is the room

How to cover an entire ceiling in 703???-imageuploadedbygearslutz1344651097.383586.jpg
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Old 11th August 2012   #25
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I can either use this room, or take down a wall dividing two 12x11 rooms to make one big room. Either way, I want a drop ceiling cloud.
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Old 11th August 2012   #26
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Pitch........ the mains run at a right angle to the joist - so there is no issue with grid layout.

In a 12x12 room - material pricing from Lowes - not bothering with tax - just a quick look (and not accounting for anything other than just the plywood needed to accomplish the work)

4x8x1/2" plywood sheathing - yield for 6" strips to laminate 1" thick members would be 32 lf per sheet - you would need 7 mains (at 12') plus 4 cross mains (at 12') for a 2x4' grid per your design - cost per sheet at Lowes is 20.75 - cost per 12' main is 7.78 - total plywood cost is 85.59 for the raw materials to create the grid.

The same ceiling frame for that room using 12' main runners (5 ea @ 5.83)) 2' cross tees (12 ea @ 1.28) and 12' seamed angles (4 ea @ 4.28) is 61.63 for the raw materials.

The wire to support the ceiling in the field would be roughly the same in either case -

if you wanted to use wood trims you could still actually hang the fabric beneath the track and fasten wood trims through the track and angles to achieve the same look with no additional fabric required......

looks less expensive to me.......

Rod
Did I mention..Rod would probably roll his eyes? Bottom line Rod...

When is the last time YOU had to DO IT YOUR SELF.ROD..with.no money..only what you have...hmmmmmmmmm?


But let me qualify my whole post.

I have the plywood. I have the hardware, I have the tools. I have the skills and I have everything to MAKE IT ****ING WORK. vs ....your client..your specs...your check...your intuition..your...what the **** ever.

I only tried to show him a way to think OUTSIDE THE BOX.

Rod, with all due respect.....sometimes you don't have a ****ing clue.
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Old 11th August 2012   #27
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Quote:
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Did I mention..Rod would probably roll his eyes? Bottom line Rod...

When is the last time YOU had to DO IT YOUR SELF.ROD..with.no money..only what you have...hmmmmmmmmm?


But let me qualify my whole post.

I have the plywood. I have the hardware, I have the tools. I have the skills and I have everything to MAKE IT ****ING WORK. vs ....your client..your specs...your check...your intuition..your...what the **** ever.

I only tried to show him a way to think OUTSIDE THE BOX.

Rod, with all due respect.....sometimes you don't have a ****ing clue.
Pitch, Rod never said your idea was a bad one, he only said a ceiling grid system would be a bit cheaper and certainly more lightweight than wood, and he's used it multiple times to help clients with a smaller budget.

With respect to your fellow forum members and others who want to learn, there is no need for the excessive use of ****ings and ****s and other derogatory terms in a thread when no one is even trying to be hostile. Your tone is unnecessary. You've already typed a very large helpful post with what you would do, and I don't think anyone is arguing that your suggestion is bad. Rod only suggested that it would be slightly more expensive.
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Old 11th August 2012   #28
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I can either use this room, or take down a wall dividing two 12x11 rooms to make one big room. Either way, I want a drop ceiling cloud.
So if you take out the closet in the room, that's about a 15' span on your drawing or possibly you could have a 22' span if you combine those two 12x11 rooms. Buying metal or wood to span either of those lengths could get expensive. Possibly you could see if it would be cheaper to install a support beam between the two 12x11 rooms and only have to buy standard 12' studs? Sounds like you'll have to price materials in your area to see which is less expensive?

I can't remember if you can buy plywood in 12' lengths at a speciality plywood store or not if you were inclined to go with Pitchfork's idea and wanted to span the 12x11 rooms with one piece of wood to a center header. 12' plywood is not something the box stores carry.
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Old 11th August 2012   #29
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Well pitch - if he had all the materials he probably wouldn't be asking the question in the first place....... he was looking for an inexpensive option - I offered the least expensive.

Besides which....nothing you said had anything to do with my response....... and I never roll my eyes....... although sometimes I do sigh rather deeply when I run into insecure people who have to get hostile when trying to make their point......

Asa far as the last time I did a track install - it was in 2003....... btw - I was raised in the business - carpenter by trade long before I ever started studying engineering and design - I don't just dream these things up out of thin air.

You might want to relax a bit - all this hostility can raise one's blood pressure.....

Rod
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Old 11th August 2012   #30
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Well, I really thought it was Rod's intial reaction to me that was hostile, but then again half the people on this forum seem like they are on their period anyway so I don't pay much mind. I was simply saying I didn't think it would hold because of the sagging, not the weight. 1x4 pine would have more of a surface to overlap the panels, but if you say it will work I will trust you, even though I did not know what you did for a living.

Here is a proposed plan for me blowing out two small rooms into one big control room. I assume I can still do the drop ceiling in here, however I am wondering if there is much of an improvement over my other room to bother blowing out the wall.

Where to face my console in this room
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