Installing "Green Board"

Green Board is a moisture resistant drywall that can be cut to size and nailed into place behind your future walk-in tub surround. You'll not need to go all the way to the floor, leaving roughly 18" of a gap is fine for this type of installation (as it will be hidden by the tub). 

It's a good idea to caulk the corners and any gaps you may find above your 18" installation height to prevent moisture or humidity from trapping itself behind your new wall (even though you'll have a surround over top of it).

Covering things up

If you had a shower head previously, this is the perfect opportunity to hide the old plumbing and not have a useless shower head sticking out of your wall. Likewise, if there were any other dated or unsightly cosmetic problems, your new wall and surround will take care of these.

Storage

Adding a new surround is the perfect time to ask yourself about storage options. What do you need, and what would make bathing easier in your bathroom? Were you lacking storage for soaps or essential oils before? Consider purchasing a surround that has recessed storage spaces, but be sure they're higher than the highest section of the walk-in tub.

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