The most significant benefit of installing a surround is that it elevates your bathroom's general look and makes it a lot easier to keep your bathroom clean. This being the case, you can install a bathtub surround over an existing tub in many different ways. The common one involves screwing straight the studs where you won't be required to mount the drywall. In other ways, you can choose to glue the surround directly to the wall. However, this will apply if you're going for one with a thin-paneled style. Unlike screwing the studs into the wall, the gluing process requires little know-how. Most of them come in pieces of 3 or 5.  So, as you go around installing them onto the wall, you need to constantly look out for watertight seals to avoid any breakages.