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Old 02-08-2019, 07:19 PM   #1
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Question Prodex Insulation

So I have been reading up on insulation and I have a question:

If foam board Insulation has an R value in the 3-6 range per inch and blown foam has a slightly higher R value, has anyone found something with a higher R Value?

I found this insulation (which if I can believe all they say about it sounds ideal) which a much higher R value (15-17) for a much thinner material (5mm) and is specifically designed to be applied to metal walls and roofs (still unsure about using it as flooring). I would think the higher R value would make for a better insulation. While the cost is a bit high, it is not insane (especially to make the R value of my walls and floors 2-3 times higher) and would curve around the roof without having to cut and losing some R value there. It would also be a much easier application than traditional board or blown insulation.

Prodex ( https://www.insulation4less.com/default.aspx )

Does anyone have experience working with it? It looks like reflectix with foam insulation instead of air bubbles between the layers.
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Old 02-08-2019, 07:50 PM   #2
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Originally Posted by lee.wissmiller View Post
So I have been reading up on insulation and I have a question:

If foam board Insulation has an R value in the 3-6 range per inch and blown foam has a slightly higher R value, has anyone found something with a higher R Value?

I found this insulation (which if I can believe all they say about it sounds ideal) which a much higher R value (15-17) for a much thinner material (5mm) and is specifically designed to be applied to metal walls and roofs (still unsure about using it as flooring). I would think the higher R value would make for a better insulation. While the cost is a bit high, it is not insane (especially to make the R value of my walls and floors 2-3 times higher) and would curve around the roof without having to cut and losing some R value there. It would also be a much easier application than traditional board or blown insulation.

Prodex ( https://www.insulation4less.com/default.aspx )

Does anyone have experience working with it? It looks like reflectix with foam insulation instead of air bubbles between the layers.
I just sent an email asking for a quote on Prodex Total 10M Plus: R22 - haven't heard back yet
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Old 02-08-2019, 08:15 PM   #3
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https://www.greenbuildingadvisor.com...ed-bubble-wrap
Quite a few poor reviews on Amazon too.
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Old 02-08-2019, 08:17 PM   #4
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Question

Looks like a good product. Correct me if my numbers are wrong, but this stuff is a bunch cheaper comparing R value to Square footage. This is $305 for 700sf, or $.43/sf. Poles runs about $10 precept, or $.31/sf, But you would need 3 layers of 1/2" polyiso to compare to the R value of the Prodex, making the Polyiso cost $.93/sf. A 50% savings I my book. I'm waiting on a reply back from them on what the Rvalue is if you double up this material? This might be a winner.
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Old 02-08-2019, 08:18 PM   #5
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@peakbus: This insulation is not like that which you posted. What you posted has air bubbles between the layers of foil. this does not it has actual insulation between the layers.

Having fully read your article, I have some concerns with how it addresses Prodex specifically - as it does not support what it says about it - and places it in the category with the bubble wrap which it is not exactly, however I can see where the concern is and I want a good insulation so I will likely look at a different material.
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Old 02-08-2019, 08:20 PM   #6
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I just sent an email asking for a quote on Prodex Total 10M Plus: R22 - haven't heard back yet
The price of their products is listed on each product page. $214 for a 4' x 85.3'.
Even this sounds like a steal. $.66/sf as opposed to 5 layers of 1/2", which wouldn't fit the space at $1.55/sf
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Old 02-08-2019, 08:21 PM   #7
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https://www.greenbuildingadvisor.com...ed-bubble-wrap
Quite a few poor reviews on Amazon too.
The Prodex is a foil backed FOAM material, not bubblewrap. Bubble wrap is what they use for comparison.
They have 182 reviews listed for the product. 171 of them are 5 star positive.
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Old 02-08-2019, 09:12 PM   #8
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Quote:
Originally Posted by lee.wissmiller View Post
@peakbus: This insulation is not like that which you posted. What you posted has air bubbles between the layers of foil. this does not it has actual insulation between the layers.

Having fully read your article, I have some concerns with how it addresses Prodex specifically - as it does not support what it says about it - and places it in the category with the bubble wrap which it is not exactly, however I can see where the concern is and I want a good insulation so I will likely look at a different material.
The Prodex material specified in that article is not the same product. Can anyone find any negative reviews on this.
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Old 02-08-2019, 10:17 PM   #9
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Looks like closed cell foam with mylar?
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Old 02-09-2019, 07:54 AM   #10
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There's some pretty informative comments over at Garage Journal

https://www.garagejournal.com/forum/...ad.php?t=57607
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Old 02-09-2019, 08:54 AM   #11
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There's some pretty informative comments over at Garage Journal

https://www.garagejournal.com/forum/...ad.php?t=57607
Yeah some great comments.
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Old 02-09-2019, 11:51 AM   #12
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I bought some bubble wrap with foil on both sides one time - my idea was to use it as skirting for our camper trailer - in minus 35 c weather it was next to useless - we had to wear everything but our parkas inside the trailer - 100 degree snowpak boots, warm up pants, layers of clothing on top and gloves if you weren't eating - our short coated pet dog hovered over the furnace vent and his slouch put me in mind of a vulture over it's prey - when I scrounged some straw bales and set them around the bottom of the trailer and sealed it off with some 4 mil plastic, we were much warmer - the foil wrapped bubble wrap wasn't worth the effort it took to make skirting
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Old 02-09-2019, 01:03 PM   #13
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I didn't mean to imply this was similar to Reflectix, just that their claims seemed a tad unrealistic. Having looked at reflective barriers before, it seems that to reap the benefits, the material has to be installed in a way that would be challenging to guarantee in a skoolie build: Air gap on the reflective sides, sealed around everything, etc..
Selling a revolutionary new product is always going to be an uphill battle against established products, but I would have to see side-by-side accurate comparisons between that and, say, spray-foam before spending hours and hundreds of $$ enclosing into a beautiful ceiling.
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Old 02-20-2019, 06:28 PM   #14
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Just jumping in here with my 2.25 cents.
I am still considering the insulation from tractorinteriors.com they offer bulk material from 1/4" to 2" thick with or without laminated vinyl and even a "heat barrier" with alumized mylar for engine bulkheads & doghouses.

My only concern is how long it will stay glued to the ceiling or will I have to apply thin strips of bracing to help support it.
Really don't want to drill out rivets to remove the inner ceiling skin. BUT in all likelihood that would produce the end result I want. Uggh.
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Old 02-20-2019, 06:35 PM   #15
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Just jumping in here with my 2.25 cents.
I am still considering the insulation from tractorinteriors.com they offer bulk material from 1/4" to 2" thick with or without laminated vinyl and even a "heat barrier" with alumized mylar for engine bulkheads & doghouses.

My only concern is how long it will stay glued to the ceiling or will I have to apply thin strips of bracing to help support it.
Really don't want to drill out rivets to remove the inner ceiling skin. BUT in all likelihood that would produce the end result I want. Uggh.
What will you have for a ceiling? How is that ceiling secured to the bus? Won't any finish cover hod the insulation place, it doesn't need to stay glued.
I just realized you had planned on gluing this product to the bottom of the ceiling metal? What were your plans for covering it?
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Old 02-20-2019, 06:41 PM   #16
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It has some nice choices of vinyl colors including one that has a swirly flower pattern on a brown back ground. Same perforated vinyl as was used on car headliners years ago.
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Old 02-20-2019, 06:46 PM   #17
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Does foil even work?

So Iím also looking at insulation types and wondering if higher R values for foil backed poly foam boards take into account applications with zero air flow. Donít radiant foil barriers need air flow to work?
If so, foam board or even bubble wraps with a foil backing could be misleading if we donít get foil related R value when sealed up in a floor/ wall/ ceiling...
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Old 02-20-2019, 06:52 PM   #18
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Sorry to rain on your parade but Im skeptical of the high R value claims. The literature Iíve read about reflective insulation say for the radiant barrier to work effectively an air gap is required by installing furring strips. Iíve read 3/4Ē gap is better than 1/2Ē. Now if one wants to keep heat out and heat in does that mean having gaps on both sides of the reflective surface. Boy howdy, thatís a lot of strips and work.
I kinda like it when the sun heats up the side of my bus and dries out the condensation. I wish I could put a down parka on it when the snow starts. Iíve not found insulation I like yet for my bus. However Iíd like to try low infrared heaters on the ceiling so I donít need to insulate as much. Has anyone tried heating panels? Sorry, subject for another thread.
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Old 02-20-2019, 07:08 PM   #19
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It has some nice choices of vinyl colors including one that has a swirly flower pattern on a brown back ground. Same perforated vinyl as was used on car headliners years ago.
Gotcha, any pics of this material.
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Old 02-20-2019, 07:23 PM   #20
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Yes, on the website, menu and choose (bulk material) then choose a thickness to see color options.
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