WUFI

I am attempting to model an extensive green roof system and could also use help with the data. I have no idea how to model the 4" of growing media.

That's what I needed. Thanks Christian.

Thanks Christian.

Your response is helpful but a little over my head. How can I enter this into my model? Is there a material I should use? We are using an unsealed snap-lock standing seam so the permeability will be on the high end of the spectrum.

I am modeling a roof structure which has a 24 galvanized standing seam metal roofing (seams at 18" on center) with a LEED Certified Kynar whtie finish (SRI 78). I cannot locate this material within the database am looking for a material database or something with equivalent properties - any sug...