I agree, vinyl flooring material applied to the ceiling will certainly test the strength of the adhesive. Also, the set time on typical vinyl adhesive is long enough it would be tough to use in an overhead installation. I would look into a high strength contact adhesive such as 3M High Strength 90. You would want to test it (or any adhesive) on a scrap of vinyl to make sure that they are compatible.
I did see an interesting application of sheet vinyl flooring recently. I stayed in a motel that had a big walk in shower and the entire shower surround was a single sheet of vinyl. It really looked nice.
OK, I've been doing some more digging around and also talking to coworkers also interested in the RV/Skoolie lifestyle. Boy am I getting an education and I have to say I am rather enjoying it.
As mentioned before, vinyl has a tendency to eventually conform to the material it is stuck to. Of course, that depends upon how thick the vinyl is. Thicker vinyl will keep its original shape better. So someone mentioned putting luan on the ceiling first and attaching the vinyl to that.
What I've been reading is that luan is rather inflexible. Yes, there are ways to get it to bend but I also read there are other solutions to this. One solution would be to use bendable MDF (1/4" medium-density fibreboard) and then attach the vinyl to this.
But this goes back to making sure the vinyl would stick in a vehicle that has frequent bumps and sways:
- One solution to this would be to have ribs spanning across the roof supporting the vinyl.
- Another solution would be to staple or screw the vinyl to the MDF which would already be screwed into the ceiling of the bus.
The vision I have of my bus ceiling does not include support ribs although I will look to see if I can find anything like that and perhaps my vision will be changed. The other consideration of staples or screws would be how to make the staples and screws unnoticeable to the casual observer.
But this all begs the question I have and that is if you have to put up a board before putting up vinyl, why not just go with real wood in the first place?
<sigh>
I will research a bit more. I know I promised more examples of others who have done this so I will report back when I am able to find some.