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Old 02-06-16, 01:25 PM   #1846
j_abdeen
Lurking Renovator
 
Join Date: Dec 2015
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Quote:
jeff5may
Something is not right here. The u-values you have reference to here are those typical for an unfinished steel building, such as a grain silo or hangar bay. Single pane glass windows have a u-value around 1.2, double pane windows are around the same value as bare drywall at 0.5-0.7 Watts per square meter per degree Kelvin...
Thanks for the clarification, the u values i used where mentioned in the paper I mentioned in the previous reply and it could be not precise.

I think it worth to find the materials specifications and calculate the R value for the structure.

Regards
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