Re: [papercreters] PC inside a bus turned RV?

I used to be a "bus nut".  I had a GMC PD 4905.  And I used to communicate frequently with other bus nuts who were practical pro's when it came to conversion.  These busses flex and bend a fair amount.  The sort of accepted norm when it comes to insulation is that spray foam.  It sticks to everything, can be shaped by a rasp file and/or disc sander, adds extra strength, but still flexes along with the body of the bus.  From what I'm reading about papercrete, the two are not equal.  The foam has excellent insulation properties, but papercrete needs more thickness to accomplish the same amount of insulation.  You might find it would be more heavy than the foam insulation.  And you might find it cracking and crumbling to dust where the flexing occurs, thus adding a level of complexity over time to keeping your bus free of dust and irritants.  As much as we are prone to not consider a manmade material such as foam in order to be "green", it really seems to be the time-tested medium for what you're doing.  If I were converting a bus again, I would use spray foam in a heartbeat.  Just my two cents.

 

Perry

On Sun, May 17, 2009 at 3:57 AM, ablueprincess <ablueprincess@yahoo.com> wrote:

Hi! I am new here but I have studied PC off and on for years and I have a project I am working on that I think PC would be very good for. I am converting a bus to an RV (veggie powered) and on the inside of the bus I need to insulate and have walls. It needs to be light weight, sound absorbing, flame proof or at least retardent, strong, etc. all the bennies of PC but it also needs to be water proof (in case of leaks in the bus shell) or at least have a way to breathe and dry out. The insides of the bus are curved. I am in the destruction phase of the conversion. I am removing a lot of plastic that is molded to the contours of the bus and am thinking I would like to use them as molds for the PC. I need to get or make a mixer (but dont have a rear end of a car laying around so I need to come up with another way of mixing). There are a lot of individual indentions in the ceiling on these types of buses that I will need to spray with PC so I need a sprayer too. What do you people think?

Thanks,
Teresa

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