Re: [Phys-l] paint your roof?

[Bernard Cleyet <bernardcleyet@redshift.com>]

Yes I forgot to notice that the plastic coating is likely low in  
thermal inertia.

The plastic is likely also rather specular at 10 microns (the max.  
for about room temp.)  One could check this w/ an integrating  
thermometer -- stick a thermometer in the hole in an Al block  
roughened and black anodized.  Hold it a various angles WRT the  
normal, etc.

bc

BTW the membrane is a membrane, i.e. not thick ---

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Available in seamless 6'-, 8'-, 10'-, and 12'-widths, with both 4'-  
and 6'-
wide perimeter sheets, Sure-Weld is offered in 45- and 60-mil standard,
and 72- and 80-mil extra thicknesses. Membranes are manufactured in
standard white, gray and tan. Special colors are available upon request.

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On 2009, May 27, , at 17:47, Brian Whatcott wrote:

>  (I didn't even get into the excellent thermal resistivity offered by
> white roof membrane which is thick and plastic, along with its
> relatively low thermal capacity.