How to increase the R value of exterior sheathing?

I'm trying to model a home that will have 3 or 4 inches of R 5/inch exterior sheathing. I can't figure out how to do this. The drop down menu only has choices up to R 6. I need to enter R 15.

Steve Wolfe September 01, 2016 04:02

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2 comments

I have the same issue and wasn't able to change the U-factor of the assembly either to make it work.

BRIAN MARTEL April 05, 2017 15:45 1 vote

Thank you for contacting us. What is happening now is that our current application only allows a max of R-6. We will be launching a newer version soon that will allow users to edit the U-value on your own, as needed. A workaround is to adjust the Framing Material to Insulated Concrete Form, the Board Insulation to R-30 to R-36, and select the Exterior Finish and Thickness values. All of this can be found under the Above Grade Walls Section in step 2 (Edit Details).

We hope this is helpful.

Best,

Cool Calc.

Maria Alvarez April 11, 2017 13:36 0 votes