How to Install Green Board for Tub Surround

Green board is a drywall made to resist water penetration, and is used around areas that are more likely to get wet such as sinks and bathtubs.

Installation of the green board is not much different than putting in regular drywall, except that you also take the time to seal around the edges where it meets up with the tub.

Place green board at the ceiling with the length running horizontal to the floor.

Drill galvanized screws through the green board and into the wall frame studs. Place screws every 6 inches on each stud.

Hang a second green board panel below the first and attach it as you did the first. If the green board is too wide to fit horizontally between the top one and the tub, cut it to fit.

Trim the green board by scoring it where you need to remove extra sections. Use a utility knife to cut it.

Smooth drywall compound over the green board panel seams once they are all installed. Use a taping knife to apply the material.

Place drywall tape over the compound and flatten it down with the taping knife. Apply a second layer of compound over the tape and let it dry until the next day.

Sand the surface, then cover the seams with an additional layer of compound. Use a wider taping knife and taper the substance on the edges away from the seam. Let the surface dry.

Squeeze a bead of silicone caulk along the top edge of the tub where it meets the green board. Flatten the bead of water proof caulk down with your finger. Paint the wall when you paint the rest of the room.

Things You Will Need

  • Galvanized screws
  • Drill
  • Measuring tape
  • Utility knife
  • Drywall compound
  • Taping knife
  • Drywall tape
  • Sandpaper

About the Author

Keith Dooley has a degree in outdoor education and sports management. He has worked as an assistant athletic director, head coach and assistant coach in various sports including football, softball and golf. Dooley has worked for various websites in the past, contributing instructional articles on a wide variety of topics.