I'm not sure where this would be appropriate. The project is a LEED CI being built into a LEED Core and Shell project. The windows are 128" wide and the only blinds we can find that fit that width without being seamed contain some PVC content. (our experience with seaming blinds has not been exemplary). In this instance, does this address: Materials and Resources? Controllability of environment? daylighting and views? or does it matter at all?