R-16 insulation value from LESS than a quarter inch!

[Freebird]

R-16 insulation value from 5 mm of insulation with very thin reflective foil on both sides!
Read that again. FIVE mm of insulation gives R-16 value! R-16 !
5mm equals LESS than a quarter inch! .197" to be more precise.

Whatever small space your insulating, don't make it substantially smaller with THICK foam insulation (or any other thick insulation).
The smaller the space, the more important THIN insulation becomes!

http://www.insulation4less.com/Insul...l-48-Inch.aspx

My cousin is using this insulation for a big metal building. Very noticeable difference.

If we had a "Camper Building Materials" category, I would post this there, but I don't see one....

 

[pappawheely]

Clicky no worky

 

[Haf-E]

Its a product similar to "reflectix" type bubble wrap insulation except the inner layer is a white foam type material with small bubbles - which probably works better...

They also offer a R22 version which is twice as thick - 10mm total - which would be interesting.

The R-values they claim are dubious - they state for HEAT flow downward (i.e. in a floor?) and with a 2.5 inch air gap on each side - so not covered. That said - I've found it can work well especially since it can be used to reduce thermal bridging and can be put over other insulation also.

 

[downhill]

From their website:

"FACT #4: The R-value of reflective insulation is the measurement of the system rather than a measurement of just the product. Measuring the R-value of the system (a real-world application) is a truer measurement vs. a measurement of the product only. For example, what good is the posted R-value of fiberglass given that once installed in an environment that includes any moisture it loses R-value? Virtually all real-world environments include some humidity. Unlike fiberglass the R-value of Prodex Total insulation is NOT affected by humidity.

FACT #5: Prodex Total insulation 5mm has an R-value of 16.

The R-value was measured under the real-world parameters of:

24-inch on center 2" x 6" wood assembly. Roof application. Test Method ASTM 1116. Airspace of 2.64 inch on each side of product. Heat flow direction down."

The stated R value is the total of this structure that included the product, it is NOT the R value of the product.

 

[Pntyrmvr]

If it works that well why is it not used in modern building envelopes?


"Talk is cheap. Whiskey costs money."

 

[Freebird]

Read the product information for yourself.....
What I'm reading is tha the R-16 value is the insulation PLUS the 2.64" air on each side of the insulation. That is the SYSTEM, right? Tested in a roof application.
Air being a poor insulator, that is still sounds mighty good to me.

Am I missing something?

 

[Haf-E]

Since this is primarily a RADIANT type insulation - the air spaces on each side are important for its performance - so you would need a roof section of 6 inches or so if you wanted to have the insulation protected / covered with something else - it would need to be spaced off from the insulation 2.6 inches somehow. Kinda makes the benefit of it being 0.25 inches thick not relevant... If you do as most people do (including myself) and just sandwich it between some rigid foam and the interior finish (such as 5mm baltic birch paneling) than the performance will be much lower.

They also are not discussing the R-value in a cold weather situation where the heat flow is upward - heat rising out through the ceiling - I suspect its performance will be much lower than the claimed R-value which is specifically for a summer condition of keeping a space cool (ideal for a radiant barrier).

I'd still consider using the material over the more common bubble wrap type insulation - but I wouldn't get my hopes set too high if used for winter camping etc.

 

[java]

Looks to be the same as the "EZ Cool" I used under the carpet in my cab.

Bad pic, but you get the idea.

$70 for a 100sq ft on Amazon.

No way I would rate it anywhere near R16... (WO/ airgap anyway.....)

 

[tackett]

If it works that well why is it not used in modern building envelopes?

I think this is key: 24-inch on center 2" x 6" wood assembly. Roof application. Test Method ASTM 1116. Airspace of 2.64 inch on each side of product.

So, for something that probably costs more than fiberglass, but still takes the same space, it has a lower R value. With cheap-*** fiberglass, I can get R-21 in a 2x6 wall cavity.

I'm about to build a house (and hopefully a camper) and I see no reason to use this in either one.

It's cool, but I just don't see the application.

 

[downhill]

I think it is a great product for lots of applications requiring moderate insulation and thin material. It makes great cozies for SS water bottles and titanium coffee cups! Under vehicle carpet sounds good too. It's just that claims of R-16 are bogus. The question left unanswered is: What is the R value of the roof system WITHOUT the product? R-12 at least, I'm guessing.

Reminds me of the fable of stone soup

 

[downhill]

Looks to be the same as the "EZ Cool" I used under the carpet in my cab.

Bad pic, but you get the idea.

$70 for a 100sq ft on Amazon.

No way I would rate it anywhere near R16... (WO/ airgap anyway.....)

Java,
Nice job on the insulation! Have you noticed the cab being any warmer? Quieter? I need to replace my carpet soon, and this may be a nice upgrade.

 

[java]

Java,
Nice job on the insulation! Have you noticed the cab being any warmer? Quieter? I need to replace my carpet soon, and this may be a nice upgrade.

A little quieter, but I think most of that came from just having another layer of something over the cab-box gasket.

I did it mostly because I was getting a lot of condensation in the carpet under where the dog sleeps. I didn't play real close attention but I didn't notice it being wet either.

Sent from my SM-G950U using Tapatalk

 

[downhill]

A little quieter, but I think most of that came from just having another layer of something over the cab-box gasket.

I did it mostly because I was getting a lot of condensation in the carpet under where the dog sleeps. I didn't play real close attention but I didn't notice it being wet either.

Sent from my SM-G950U using Tapatalk

thanks!