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Old 11-30-2016, 07:50 PM   #21
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Originally Posted by EastCoastCB View Post
I'm using rockwool in some walls. Interior walls especially since its completely fire proof and thus could help if such a calamity strikes. Its hydrophobic as well. Good stuff for certain applications.
Poly board will be used in the exterior walls and ceilings. I *MAY* do a bit of spray foaming, but I'm trying to keep this simple and cost effective.
"styrofoam" is about the cheapest foam board out there.
Any other foam board is more expensive.
Styrofoam and rock wool have almost identical R values per inch.
I was at Lowes comparing prices and the rock wool is 1/2 as expensive as styrofoam sheets per sq ft.

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Old 11-30-2016, 09:35 PM   #22
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Do keep the heaters. My travel companions are always clamoring for more heat.

And YES! The heaters definitely can be used to help cool the engine. It's a trick that goes back to forever.
Back in the very old days, truckers would climb long steep grades by locking the accelerator wide open, turning the heat on full, and STANDING ON THE RUNNING BOARD, steering thru the open door window. (At least, so I have read. I'm not quite that old.)

While we are on this.... I installed a manual toggle switch on Millicent's radiator fan, and I turn the fan on when I begin to climb a hill. Her engine cooling is good as it is, but running the fan helps keep the transmission temperature down.
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Old 12-01-2016, 10:06 AM   #23
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Rockwool will absorb and hold more moisture than fiberglass. So much that cannabis growers use it as a starting medium.
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Old 12-01-2016, 10:11 AM   #24
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Rockwool will absorb and hold more moisture than fiberglass. So much that cannabis growers use it as a starting medium.
Quote "ROXUL insulation does not absorb water or hold moisture" You can find this at; ROXUL® | Fire and Soundproofing Insulation
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Old 12-01-2016, 10:24 AM   #25
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True, the mineral fibers themselves don't, but the fibrous nature of the material means it can indeed hold significant amounts of water. The mfgr's claim is a clever marketing twist.

https://www.icmag.com/ic/showthread.php?t=315763

The folks above rely on its' moisture retention abilities. Or just ask anyone who has worked with it in industrial applications. Great stuff as a thermal barrier...but only if kept dry.
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Old 12-01-2016, 10:32 AM   #26
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Rockwool will absorb and hold more moisture than fiberglass. So much that cannabis growers use it as a starting medium.
Why I'm ONLY planning to use it on the wall behind the driver/engine/cab area and the bedroom wall.
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Old 12-01-2016, 10:55 AM   #27
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https://youtu.be/gLDxhbKfVeo

@4:11 in the show the water "repellant" propertiesAppears you pretty much have to submerge it in water for a period of time before it will become saturated.

Un-like fiberglass batts
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Old 12-01-2016, 11:03 AM   #28
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I use hushmat on my firewall and engne areas.. seems to really help with the heat in the driver seat on hot summer days..

-Christopher
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Old 03-02-2022, 10:31 AM   #29
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Did you end up being able to reuse the metal from the original roof?
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Old 03-02-2022, 11:04 AM   #30
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Still have not replaced the ceiling panels but that is still the plan after spray foam. I'm just making sure I've added everything to the roof that I'm going to put up there ie; solar panels and awning so i can still get to the underside. I like the idea of better structural integrity with the metal panels and I'm also trying to retrain every bit of height in the bus as possible.
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