I thought I would revive this post as it contains some great information. I am at this stage in my trailer build and after hours of research on soundproofing and insulating I am more confused now than before.
I would like to get input from those that have done it and have data to back up their claims. “Facta Non Verba” or Deeds Not Words.
Due to my Stealth flat black Cloaking covering on my cargo trailer I will need to think in layers, kind of like an Ogre or a parfait.
I read here that Black roofs will raise the outside surface temperature 90% above the ambient temp. So if it 100 degrees outside, the roof’s surface will be 190 degrees… ouch! So first thing would be to reflect that heat back up and away from the interior of the trailer!
I am open for suggestions as to what would work the best. I know it will be expensive to do it right.
“sooner or later, with some dumb luck we will find a convert, but when he finds out what that DOW Blue board costs he will get scared off.”
I have 1” metal studs/ribs so I know I will need to make them thicker for the layers. I read somewhere here about underbody spray being used to put a rubberized rust inhibitor coating on the metal ribs.
There is a new product, LizardSkin Ceramic Insulation (CI) that is an advanced spray on thermal coating that consists of a water-based composition of high-grade acrylic binders with ceramic insulation particles to create a thermal barrier. But I would imagine it is high $$$.
Spray foam could be an option but I like the idea of parfaits, I mean layers. Like a Dynamat or Fat Mat applied to the aluminum skin. My thoughts on layers please question me and/or advise me as needed.
The first layer against the skin will need to provide mass and block noise, while a layer of acoustic foam will work as a decoupler, structurally isolating the layer from the wall or ceiling, which in turn improves the sound stopping performance.
Next would be foam to fill out the rib depth with some kind of decoupler added to extend the depth of the studs.
The next layer consists of a foil bubble foil, or a foil-batt material that retards heat transfer by reflecting heat back to its source and by trapping air in its multiple layers.
Followed by a second layer of foam and plywood. I Like the ceiling insulation here.
For the floor insulation start with foam then plywood with an Acoustic Underlayment used under flooring to improve the trailer’s sound insulation.
I like what Over the Top did for his ceiling with the denim batt insulation.
Some other products I have considered.
I want to do this right the first time... So if you have knowledge about what would work best and if you had it to do over... How would you do it?http://www.tnttt.com/posting.php?mode=reply&f=42&t=57263#
Neighbors don't appreciate me working in the buff with those temps so to keep peace and the cops from paying me a visit I run my AC. 
Some folks just don't have much of a sense of humor about things like that.
See the new pics in my gallery.
