What ceiling/roof is best?

[RICK FITZPATRICK]

Primary goal is to rid all the 90 degree angles. Those trap the harmonics and cause the multiple additional harmonics which destroy the clean signals.

Hmmm, trap them you say? I was under the impression that anything that's "trapped" can't escape..like a BASS TRAP. btw, can you please define these so called harmonics in terms of wavelengths/frequency/physics. I like to know what I'm dealing with..especially if I must build a Mansard roof to successfully impliment your brilliant solution. You know..the Building Inspection department wants documentation on the Permit application and Plan.

As to ceiling, the ceiling style I mentioned is generally for new construction or for rebuilds.

Quit beating around the bush.
That still doesn't answer my question. Exactly HOW does this Mansard roof
you've suggested, have anything at all to do with an interior space. Especially if this is any example.

Unless I'm missing something, typical Mansard roof framing conventions suggest your "ceiling" corner solution has a flaw. And my local Building Inspection department would love to see your framing plan/details, especially if this roof framing "concept" of yours intersedes within the interior space to provide a nailing surface for a cieling/wall intersection that results in a non typical structural support of the second floor. Can you please provide a detail of your proposed framing. I mean, afterall, you said this is easy for new construction. I want to see this easy.

For existing rooms you can use angled foam blocks

How enlightening. Foam eh? What kind of foam?

If you are using an existing room, you can purchase angled foam to put along ceiling line, etc. to rid the corners and will also act as damping.

Rid the corners? The corners still exist. And depending on what kind of foam you specify for us, they still reflect. But I'm really curious about this damping thing. Damping what?

This should not offend the lady of the house if the room is dedicated to your usage.

I didn't say the use of some kind of corner filler within a room would offend the lady of the house. I said a MANSARD ROOF decision without consulting her MAY not just offend her...it might really piss her off.
mad: Please read my replys and reply accordingly. btw, its blindingly clear you are not married.

Ceiling design helps control all harmonics to rid the multiples.

You still haven't described this so called "ceiling design"..in terms of the Mansard roof connection nor filling the ceiling/wall corner with foam...which I would hardly consider a "ceiling design". In fact, I don't have a clue wtf you are talking about. Ceiling design????????? ah....I'm beginning to get a clue about something else though.

Ceiling design helps control all harmonics to rid the multiples. It is not just one factor;it is everything combined. The ceiling is a great place to start when building or remodeling. Look at all the 90 degree angles with respect to the room!

There you go again. Comon pal...show us this so called "ceiling design". All you've showed us is standard 90 degree
right angle wall/wall and wall/ceiling intersections filled with some kind of foam with unknown specifications. AND, you haven't shown us ANYTHING to document this "connection" between a Mansard roof and this so called "ceiling design". In fact, you don't even show one single
dimension of ANYTHING. For instance, based on your drawing, I can't tell if each side of this foam thing is 1" or 10" or 1' or what? PLEASE GIVE US A CLUE.


Furthermore, corner foams have been around for decades, and frankly speaking...you aren't telling us anything that most of us here don't know already. But I believe we can show you a thing or two.

Like this:
http://forum.studiotips.com/viewtopic.php?f=8&t=536
or this
http://forum.studiotips.com/viewtopic.php?f=8&t=535
..

Therefore a "correct" room has few right angles, few equal length walls, and negligible harmonic issues.

So, what you are saying is..you are a proponent of splayed walls/ceilings. Of which you haven't given us a clue how a Mansard roof enters the picture. Oh, btw..the FLOOR/WALLS are ALL 90deg RIGHT ANGLES.
Perhaps you might be interested in this...

You could even call it a Mansard floor.

Search for acoustic materials, etc, and you will come up with a ton of info.

Yea, like the STICKEY at the top of this forum. I suggest you read it Ccalo. I believe you might even become enlightend.
We don't recommend RIGID FIBERGLASS for nothing.

Auralex is a good one.

oh..................
NOWWWWWWWWWWWWWWW I get it. pullllllleeeeeeeese.




Except a set of absorption coeffiecients AND PRICE TAG
comparable with RIGID FIBERGLASS. Ccalo, its very apparent you haven't been around this area of recording very long. I suggest YOU do the research.
You really should. BEFORE you go around recommending MANSARD ROOFS and foam.

unbelievable.

That can do but a design such as that can cause some problems as well.

Really? Please define them. I'd love to hear your scientific explanation. Considering the drawing doesn't tell you what the INTERIOR ceiling is like...I mean, that is simply a SHED roof, which COULD be framed with a flat ceiling.

If you look at my drawing, turn it 45 degrees to right, you have effectively a mansard configuration for the corner which works extremely well for ceiling design.

Hmmm. theres that "ceiling design" thing again.
But...ok. I will.
hmmmmm.........but if I build it like you show at 45 degrees,
well, I don't think my building inspection department will buy it.

I
I believe the walls may fall now from the roof load.


On the other hand, if you simply rotate the "roof" and superimpose your "foam corner filler...please show me a foam product to match what ever roof pitch you chose... or how to make up the difference between what "Auralux" has to offer and what it REALLY would take........good god this is getting rediculous.

that is if your "ceiling" drywall is fastened to the roof rafters...which...most everyone knows here...must be rather robust in order to add multiple drywall layers for a better TL than a standard Two leaf wall provides.

Oh, and about those "dimensions" I mentioned...

This is getting REAL old.

Hope this answers what you were asking. If not fire away.

I think I need a drink. Lawrence Livermore Lab indeed.