Removable Peel and Stick wallpapers are not safe when installed over textured walls as they can fall off shortly after installation. Common types of wall textures are: Orange Peel, Popcorn, Knockdown, Slap Brush, Sanded Walls. If your wall is not smooth to touch, flat and free of any deformation, then it is textured.  We offer an amazing material for textured walls Long Term Peel and Stick, please save yourself from the awful and also dangerous experience.