Use the right Sikaflex for the job
RIGHT - just knew that SIKAFLEX makes some mother-glues (or would that rather be "bonding agents"?) for various applications in the bus/truck/trailer industry.
If someone is smart enough to tackle a bus conversion, I would hope, they are smart enough to RESEARCH EVERYTHING before they touch it!
I got to the Sikaflex via this read:
[WARNING!! ADDICTIVE! LOOONG READ]
http://www.robgray.com/graynomad/wothah ... /index.php
....it's a little tricky to navigate the blog, but once you get to it it's an excellent idea-source!
Just for those, that still doubt the "glue only!" approach: There is now quite a few airplanes out there, that have the wing skin glued on ONLY!
You may find a rivet here or there, but that was used only to hold the skin in place for until the glue cured....
[...the few planes that still use metal wings instead of plastic]
Obviously Sikaflex is not the only glue producer and I am sure there are tables out there that will compare with other manufacturers.
The mental threshold with glue only is, that we have a hard time to picture HOW the glue holds things together (and images of goey stuff letting slowly go do not help either), but if you care for doing a little research into this, you will find out fairly quickly, that "glue" (the Sikaflex and Co. - high end type stuff) actually has better holding power than anything else (rivets, bolts, screws, nails) and only welding comes close.
Another little bit for those, that shy away from glueing and welding and prefer to rivet things up:
Rivets and riveting look easy, but are anything but...!!
Again, research and you will find out quickly, that RIVETS are quite a science. Proper hole preparation, proper installation, proper rivet selection is not that simple!
I read quite a few times in different threads that people go all crazy about rivet-shear-strength.
Many times this data is just an academic data point, that in the end is not important to the specific rivet at all!! - ...and if that rivet is employed in a shear situation it will fail shortly!
There is only a very few SPECIAL SHEAR rivets out there!
Most all of the rest are engineered towards maximum TENSION!!
In most cases, the holding power between two sheets of material (in the bus cases mostly metal...) actually comes from the FRICTION between the overlapping part of the two sheets! The harder you press them together, the more friction you have the more holding power you get - the rivets are NOT supposed to hold the sheets together, but to provide the "pressing together"-power.
The regular flexing can loosen a rivet in no time, if it is not properly installed.
Often a rivet can look perfect from the outside, but maybe the hole was a little too tight or too big or out of round and the rivet is not properly seated because of that - eventually it will let go and you might not even see it!
[Anyone DEBURRED the rivet holes in BOTH sheets/profiles/window posts on BOTH sides?? Sharp edges may/will cut into the rivet and render it nearly useless, even if it looks "nice" from the outside!]
Of course this doesn't matter too much when the bus is parked, but becomes somewhat important when you need to "let the forces flow through the bus" while driving and flexing and becomes REALLY important, when you (hopefully never!) put it to the test (rolling and crashing the good home!).
At the end, that is the REAL reason for us to pick a skoolie - "just in case" - most motorhomes and camper trailers will live their lives just fine, only a fraction find a violent end, but then they disintegrate, beware of the poor soul inside at that point!