Ceiling Insulation Plan

[DoubleEagle]

Don't forget to consider the flammability and burn rate of these plastic components that are being used in a confined living space, and the toxicity of the fumes that are given off.

[chessie4905]

Drywall screws work quite well due to the coarse thread. Not as good as screwing into wood, but will be satisfactory. Use the better coated ones that use a torx but that comes in the box of screws.

[Jeremy]

My bus roof is curved but I've made the ceiling flat by installing a longitudinal and transverse framework above it from which the ceiling panels will hang. That framework was obviously (or perhaps not?) installed before the insulation was fitted and it also has the effect of (apart from right at the edges) making the foam much deeper than it would otherwise have been. To repeat again what I said in my previous post, I see installing the insulation as being something you do quite late in the conversion process, not as the very first step as so many others do.

The ceiling panels themselves in my bus were initially just going to be plywood panels covered with wood veneer in some places and acrylic mirror sheet in others - but in the process of buying the acrylic mirror sheet I discovered aluminum composite panel (sold under various trade names such as Dibond), which has been a complete revelation to me - light weight, very very stiff, fairly economic to buy, available in a vast range of finishes (including mirror obviously), and just generally excellent stuff. It's also a sign making material like the plastic sheet mentioned earlier, but is much more of a 'structural' type of material. As I say it was a complete revelation to me and I can see using it for all sorts of other jobs on the bus too - well worth checking out if you aren't familiar with it.

Jeremy

[Tom Y]

Kind of late to this but here is what I did. After the pink thin layer I put the aluminum sheets back on and glued to them.

[Scott & Heather]

Spray foam is the way to go. But it cost me $2500. But it really is effective. Don’t DIY this...it almost never works out well.



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[TomC]

Here's my truck conversion with 1x3 planks and no metal exposed for 2.25" of insulation

[chessie4905]

Finally we have a picture of a job that the foam is totally flush like it should be, not with depressions in lots of areas. Good job.

[scanzel]

Tom C, when can we see a picture of your truck conversion of the outside of it. I just love a cab over and if I could do it again I would do a cab over.

[chessie4905]

Found a picture of it! 😯

http://movinginsider.com/2013/09/27/used-u-haul-truck-conversions/

[Scott & Heather]

Cheesie, mine has almost no depressions. Maybe a few very shallow ones. Nothing wrong with small air pockets between the walls. A 1/4” depression isn’t going to make a huge difference in Rvalue. I have added insulating felt and thin foam sheet on top of that foam before laying my 3/4” wood walls. I’m plenty insulated...after all I fulltime in -28°F and up to 114°F weather. For 90% of you guys, fretting about depressions in your spray foam job is pedantic because you are fair weather chasers and wouldn’t dream of being caught in minus degree weather. Good on tomc for completely flush foam and I’m fascinated by his quality truck conversion, but again, as long as you have your walls filled, slight depressions are not the end of the world. Now, just a thin coating of foam leaving the walls mostly empty is a different story.


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[chessie4905]

My point is that if you pay the big price to have it foamed, make it clear to the contractor, you want the finished product totally flush. But, maybe that's just me. I'm sort of anal about those things.

[Scott & Heather]

Good point. And I’ll add another, make sure you and they understand who is doing the foam shaving and cleanup because that’s probably the worst job of all!


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[TomC]

If you want to see some pictures of my truck conversion, so to Facebook. I'm listed as- Thomas R Christman. Good Luck, TomC

[Scott & Heather]

Tom, I tried to add you as a friend but you’ve disabled that feature. I’d love to connect...can you add me? Scott Michael Bennett:
https://m.facebook.com/scott.michael.bennett?ref=bookmark


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