Since it took me a little while to find the special roof window library, I am also linking it here in case anyone finds it useful.
https://sourceforge.net/p/sweethome3d/plug-ins/40/#b551

@Keet or @Dorin, perhaps the link could be added somehow more prominently somewhere, e.g. at the Plugins Page or in the Tutorials? (there's always the possibilty that it's already there and I was not smart enough to find it - in that case, please disregard this)

Thanks for the great work and responsiveness