Hi fellows. Heard some feedback from other FaceBook members that sometimes vendors may try to pass off indoor blinds-material as materials suitable for outdoor blinds. Is there anyway we can evaluate this? Does outdoor blinds material exhibit certain measurable/visually observable characteristics? Btw, is it true that we are only allowed to install roller & bamboo chic blinds for exposed areas (like balconies); cannot use timber/PVC blinds for outdoor?