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Full Version: Are there any charts that exist that show the R value of insulation?
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(11-21-2019, 04:33 PM)RogerD Wrote: [ -> ]I don't remember where I got this but found it on the net some time ago.

Looks like it is closed cell spray foam that I need. ThanksSmile
(11-21-2019, 04:54 AM)poot_traveller Wrote: [ -> ]My above source (the manufacturer) has it at 1.1 per inch.
No, Poot, you are looking at mm .
1 inch is 2.54 centimeters.
So the chart is correct, 1.1 R value per 30mm

So if you have 2 inches, that's 5.08 centimeters  (508 mm)
I am very happy with my POLYISO from Home depot.

I used 2" which has about a 12 R-value.
ah, Sofi figured it out good job Sofi. I totally missed the cm mm thing. duh. I new something was up. highdesertranger
(11-22-2019, 03:55 AM)Sofisintown Wrote: [ -> ]No, Poot, you are looking at mm .
1 inch is 2.54 centimeters.
So the chart is correct, 1.1 R value per 30mm

So if you have 2 inches, that's 5.08 centimeters  (508 mm)

5.08 cm is 50.8 mm, not 508 mm.
(11-22-2019, 07:37 AM)highdesertranger Wrote: [ -> ]ah, Sofi figured it out good job Sofi. I totally missed the cm mm thing. duh. I new something was up. highdesertranger

It doesn't really change much. 30mm is close enough enough to an inch, I'm only off by 5mm.
[.
(11-22-2019, 11:38 PM)poot_traveller Wrote: [ -> ]5.08 cm is 50.8 mm, not 508 mm.
You are right here, I messed up
(11-20-2019, 10:08 PM)poot_traveller Wrote: [ -> ]I searched google and found nothing.  Is there anywhere I can get a chart that will show me the R value of different kinds of insulation?
I found this chart Poot, but the R-values are per inch.


https://c03.apogee.net/mvc/home/hes/land/el?spc=hel&id=2340&utilityname=mp
Polyiso... it has the best rating on the chart.
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