If your wallpaper is peeling or falling down, this is evidence that your wall's paint surface is repelling the adhesive. If it is only peeling a little, we can add some double sided tape to help stop the peeling. If your wallpaper is falling down, then your wallpaper needs to be removed and your wall needs to be sanded back and repainted with a water based primer. Both our Peel & Stick Removable Wallpaper and our Self Adhesive Vinyl Wallpaper both have specific paint surface requirements to ensure they stick to your wall long term. Preparing your wall correctly for your preferred wallpaper material is the customer's responsibility. You can read more about these wall surface requirements here.