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Old 01-24-2021, 08:48 PM   #1
Skoolie
 
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help me find old thread

A while ago, I came across a thread discussing floor insulation. In particular, someone had posted about a very thin (50 mils) material that had some incredibly high "R" value. I've spent a few hours looking but haven't been able to find that thread again.
So...please help!
Thanks
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Old 01-24-2021, 08:55 PM   #2
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Was that, perhaps, the ceramic paper material? Like the EHP Rollboard https://engineheatprotection.com/pro...h-p-rollboard/ ? Or there's a company in Tucson with a similar product and they're quite helpful. minseal.com

This stuff will "block" an amazing amount of heat transfer, such as from generators and engines, and it's pretty thin...about 1/8 inch.

Here's a review of this stuff, from Yvan Lacroix (they have a nice YouTube channel and show this stuff there) https://engineheatprotection.com/eng...ehp-rollboard/

The minseal.com material feels identical to me and I like that they're a smallish Arizona company...although we live in the north part of the state so they're not really close.
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Old 01-25-2021, 01:37 AM   #3
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There was some discussion about some thin material with high R value, but that R value comes from the reflective surface on it, not the material itself. If it was put in a floor, it would be almost useless in terms of R value because there is no air gap to reflect to.
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Old 01-25-2021, 07:02 PM   #4
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1st...thank you very much for locating the sought after info. I want to do some research on my floor insulation/sound deadening so I'll be ready when the time comes. As of now, I have about a quarter of the plywood up so I have a ways to go.

As far as the R-value being from it's reflective properties, I hadn't thought of that...I did wonder how something so thin could have any insulating value at all.
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Old 01-25-2021, 07:13 PM   #5
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Keep in mind that the reflective stuff and the ceramic paper are different animals. I, personally, haven't found a good use for the reflective stuff...except to put in windows when parked. The ceramic paper/felt, though, is pretty impressive.
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Old 01-25-2021, 07:55 PM   #6
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the "Roll-board" is pricey...but if it performs as they claim it would be worth it. I am thinking about gluing the roll board directly on the metal, then using 1/2" foam board and 1/2" plywood on the floor.
As I stated previously, I'm not ready yet..still have a lot of the old floor to remove and then rust treatment. Fortunately, the worse rust is around the wheel wells. Hit it with a hammer and break up the scales but still pretty solid.
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Old 01-25-2021, 08:29 PM   #7
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Quote:
Originally Posted by rossvtaylor View Post
Keep in mind that the reflective stuff and the ceramic paper are different animals. I, personally, haven't found a good use for the reflective stuff...except to put in windows when parked. The ceramic paper/felt, though, is pretty impressive.
That stuff is useless as insulation for a floor, it is made to not melt or catch fire, not a problem for a bus floor. There is no magic material.
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Old 01-25-2021, 09:41 PM   #8
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No magic material...true. And the claims I see about that reflective Mylar bubble wrap are hype, indeed. It may make a good vapor barrier, if the seams are taped, but there are other ways to do that. But I respectfully disagree about the ceramic fiber board being useless. It's got very low thermal conductivity and works well as a break to any thermal bridging, which would have the effect of increasing the resistance to heat transfer...which is, I think, a goal here. I first found it when we bought a medium duty ambulance and encountered it installed in the generator compartment. It's pretty impressive stuff and we use it now. It seems to help with both sound deadening and heat transfer, so for us it's worth the cost.

I have no personal stake in this. I don't sell it and have no affiliation with any company which does. But, if you get 10 friends who want to sell it, and they each get 10 friends, I might consider it...
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Old 01-25-2021, 11:42 PM   #9
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Yeah not useless, just 10x more expensive. They make some 1/4 thick pink foam sheets (R1) that will do the same thing. They come in accordian folds that unfold into like 30ft long or something, so you can get no-seam coverage of a long 4ft wide swath.
I picked up a truckfull of it for like $40 or something like that. Don't see it at HD, might have to order it
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Old 01-25-2021, 11:55 PM   #10
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Quote:
Originally Posted by BeNimble View Post
Yeah not useless, just 10x more expensive. They make some 1/4 thick pink foam sheets (R1) that will do the same thing. They come in accordian folds that unfold into like 30ft long or something, so you can get no-seam coverage of a long 4ft wide swath.
I picked up a truckfull of it for like $40 or something like that. Don't see it at HD, might have to order it
Lowe's has it (in blue-green, anyway): https://www.lowes.com/pd/Kingspan-In...tion/999972970.
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