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 :)
curtkram
May 11, 16 10:29 am
look into comcheck. they have some math thing to account for that.
BulgarBlogger
May 11, 16 10:45 am
I'm talking about revit... I know about comcheck....
BulgarBlogger
May 11, 16 11:09 am
seriously- no one knows the answer to this?
TheRevitKid
May 11, 16 12:24 pm
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.
BulgarBlogger
May 11, 16 12:31 pm
that still makes no sense.... that assumes that the wall has a continuous r-value...
gruen
May 12, 16 8:44 pm
Drrrr.... This is just math. Percent of the wall that is stud vs percent that is insulated, come up with the average.
TheRevitKid
May 13, 16 12:46 pm
Correct, unless you plan on modeling the actual studs in Revit, which I DON'T recommend you do... just do the math.
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 :)
look into comcheck. they have some math thing to account for that.
I'm talking about revit... I know about comcheck....
seriously- no one knows the answer to this?
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.
that still makes no sense.... that assumes that the wall has a continuous r-value...
Drrrr.... This is just math. Percent of the wall that is stud vs percent that is insulated, come up with the average.
Correct, unless you plan on modeling the actual studs in Revit, which I DON'T recommend you do... just do the math.