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R/U Values in Revit

BulgarBlogger

In a wall assembly with batt insulation or some kind of spray foam insulation inside the wall cavity, does anyone know how to obtain the r-value of the assembly when taking into account the spacing of the studs (16" o.c. vs. 24" o.c.) The r-value / u-value of the wall will be different at the studs than at the non-stud portion of the wall. 

Thanks :)

 
May 11, 16 10:18 am
curtkram

look into comcheck.  they have some math thing to account for that.
 

May 11, 16 10:29 am  · 
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BulgarBlogger

I'm talking about revit... I know about comcheck.... 

May 11, 16 10:45 am  · 
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BulgarBlogger

seriously- no one knows the answer to this?

May 11, 16 11:09 am  · 
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TheRevitKid

You have to assign the correct thermal values to the stud material.  Make a stud material for 24" and a stud material for 16" and assign the right thermal values for each.   Revit will do the rest. 

May 11, 16 12:24 pm  · 
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BulgarBlogger

that still makes no sense.... that assumes that the wall has a continuous r-value...

May 11, 16 12:31 pm  · 
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gruen
Drrrr.... This is just math. Percent of the wall that is stud vs percent that is insulated, come up with the average.
May 12, 16 8:44 pm  · 
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TheRevitKid

Correct, unless you plan on modeling the actual studs in Revit, which I DON'T recommend you do... just do the math.

May 13, 16 12:46 pm  · 
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