Thank you LIz,
Yep, I did try there first, but in the meantime, I ended with a solution already.
I created a roof with the slope I needed.
Thank you again,
:-)
Hi David, the user who submitted this BIM object hasn't been active on Modlar for a few years, so it's not likely you will find an answer. Our sister site BIMsmith has a great range of BIM files, have you tried looking there yet?