framing doesn’t allow for it, you should consider increasing the drain in
your shower to 2 inches.
Also, If you live in a region where temperatures drop below freezing during
the winter, it’s important that your water supply lines don’t get routed
through an exterior wall.
Lighting. Consider recessed light fixtures throughout your ceiling to
brighten up the room. Include one (or two) in your shower with the
proper shower trim. Install a dimmer switch so you can adjust the mood
in your bathroom. You’ll want to consider how you’ll be using the
mirror in your bathroom and whether you want aesthetic or functional
lighting. Whether you’ll be applying make-up or shaving, bright light
fixtures properly placed go a long way to help you see what you’re doing
close up.