Tub Surround Tile Installation — Three-Wall Alcove on Cement Board
The yellowed fiberglass surround or the cracked tile above the tub comes off, the walls get cement board and a membrane, and porcelain goes up plumb with a niche where the shampoo bottles used to sit on the tub edge.
JMB Builders does tub surround tile installation across the Twin Cities metro: the three walls above a standard alcove bathtub, tiled over cement board with a waterproofing membrane, a recessed niche on the back wall, and a trim tile or metal edge where the tile stops. The tub stays. A licensed plumber handles the valve and spout if they are being replaced. Priced per project, quoted from your photos within one business day.
- Priced per project, quoted from photos
- Cement board with a waterproofing membrane
- Niche on the back wall, trim tile at the edges
- Licensed plumber for the valve and spout
- Licensed MN contractor BC809005
A tub surround is the most common tile job in a hall bath: the tub is fine, the walls above it are not. The fiberglass surround has yellowed and the caulk at its seams is gone, or the original tile is loose along the bottom row where the tub flange was never sealed. Either way, the walls come off to the studs and get rebuilt as a wet wall. It is a smaller job than a full walk-in shower, and it gets the same layers.
The build: old surround or tile and the board behind it come out. The studs get checked for rot at the bottom, and blocking goes in for a grab bar if you want one later. Cement board goes on, with the bottom edge held just above the tub flange so it cannot wick. A liquid or sheet waterproofing membrane goes over the board and seals the seams, the screws, the valve opening and the flange. Then the tile: layout starts from a level line above the tub so the bottom cut is even along the whole tub, full tiles show at eye level, and the cuts land in the back corners.
The niche goes on the back wall between two studs, sloped so it drains, waterproofed as part of the wall, and lined up with the grout lines. The tile stops at the top of the wall, at the ceiling, or a course past the shower head, finished with a bullnose, a pencil trim or a metal edge profile. The seam at the tub and every inside corner get silicone, not grout, and the tub gets a fresh bead against the tile.
What you supply
- Wall tile and the niche or accent tile, with about ten percent extra; we will confirm the quantity from your tub size
- The trim tile or metal edge profile you want where the tile stops, or leave the choice to us
- A new valve trim, spout and shower head if you are replacing them; the plumber sets the valve
- Grout and silicone color, and whether you want a curtain rod or a glass door later
What JMB supplies
- Demo of the old surround or tile and the board behind it, and haul-away
- Stud check, rot repair at the tub deck if needed, and blocking for a grab bar or a door
- Cement board set above the tub flange, corners taped, and a waterproofing membrane over it
- A recessed niche framed between studs on the back wall, sloped and waterproofed
- Thinset, grout, color-matched silicone, and a leveling system for large-format tile
- Trim tile or a metal edge profile at the exposed edges, and a new silicone bead at the tub
- A licensed plumber for the valve, spout or moved lines, on our quote or yours
- Photos of the waterproofing and the finished surround in your job folder
How it is priced: per project
Quoted in writing from your photos within one business day. What moves the number:
- Tile to the ceiling or stopped a course above the shower head
- Tile size and pattern: large tile is faster to set; small tile, mosaic or herringbone takes longer
- A niche, a corner shelf, or both
- Whether the valve and spout stay or the plumber replaces them, which is usual when the wall depth changes
- Rot at the bottom of the studs or the tub deck, common under an old fiberglass surround
- The window inside the surround, if there is one, which needs a waterproofed sill and tile returns
- Whether the tub itself stays, gets reglazed by a separate trade, or is replaced by the plumber
Send a photo of the tub from the doorway, one of the valve wall, and the tile you picked. If there is a window in the surround, send a close-up of it too.
How long it takes
A standard three-wall tub surround: about four working days from demo to grout, with the plumber's visit inside that, then a few days before the tub is used while the silicone cures.
How your project works
- 1
Send photos, get a written quote
Send three photos of the space and a sentence about what you want. You get a clear, itemized quote within one business day. We only come out to measure first when the job needs a tape measure — no pressure, no games.
- 2
Pick materials, or bring your own
We help you choose profiles and materials that fit the house and the budget, or match your existing millwork exactly — or you buy the door or trim yourself and we install it. Everything is confirmed before the crew is scheduled.
- 3
Clean, precise installation
The crew shows up on time, protects floors and furniture, and installs with tight joints and consistent reveals. Photos of the finished work go in your job folder.
- 4
Walkthrough and invoice
We walk the finished work with you. If anything is not right, we fix it before we call the job done. Then one invoice, paid by check or direct deposit — no card fees, no payment links.
Situations and options
Replace a fiberglass surround with tile
The one-piece or three-piece plastic surround comes out, along with whatever it was glued to. The walls get cement board and a membrane, and the tile goes on. The plumber usually replaces the valve trim because the new wall is a different depth.
Retile an old tiled surround
Old tile and the board behind it come out; we do not tile over tile. The studs get checked, the bottom plate and tub deck get repaired if the old flange leaked, and the wall is rebuilt on cement board and a membrane before the new tile.
Surround with a window
A window inside a tub surround is the leak everyone finds later. The sill gets sloped and waterproofed, the jambs get tile returns or a PVC trim, and the joint at the window is siliconed. We pair it with our PVC bathroom window trim when the wood is rotted.
Tile to the ceiling
The tile runs all the way up and dies into the ceiling with a silicone joint, instead of stopping with a trim course. It costs a little more in tile and time and it leaves no ledge for water to sit on.
Tub Surround Tile Installation — Three-Wall Alcove on Cement Board: questions, answered
Can you tile over a fiberglass tub surround?
No. Tile needs a rigid, flat, waterproofed backing, and a plastic surround is none of those; thinset will not bond to it and the panel flexes. The surround comes off, along with the drywall or whatever it was glued to, and the walls are rebuilt on cement board with a membrane before any tile goes up. Demo of a surround is quick.
Does a tub surround need waterproofing behind the tile?
Yes. Cement board is not waterproof; it is a stable backer that does not fall apart when it gets wet. Water gets through grout, so the board gets a liquid or sheet membrane over it that seals the seams, the screw heads, the valve opening and the joint at the tub flange. Without it the wall stays damp behind the tile and the bottom row is the first to let go.
Do I need a plumber for a tub surround?
If the valve, spout or shower arm is being replaced or moved, yes, and that work is done by a licensed plumber, not by us. Most surrounds end up with a new valve trim because the new wall is a different thickness than the old one and the old trim will not fit. We bring in a plumber we work with, or coordinate with yours, and set the timing so the valve is done before the wall closes up.
How high should the tile go above a bathtub?
At least past the shower head, and most people take it to the ceiling. Stopping a course or two above the head leaves a trim course and a strip of painted drywall that gets splashed; running to the ceiling gives a clean look and no ledge for water. It costs a little more in tile and time. Both are done with a trim tile or a metal edge where the tile ends.
Can you add a niche to a tub surround?
Yes, and a surround is the easiest place to do it. The niche goes on the back wall between two studs, where there is no plumbing, with a sloped bottom so it drains and a membrane run into it as part of the wall. We set it so the grout lines carry through and it sits at a height you can reach from the tub. A second one at kid height is common.
Should I replace the tub while the walls are open?
If the tub is chipped, rusting at the drain or a color you have been living with, this is the time, because the walls are already open and the tile will be built to the new tub's flange. Setting a new tub is the plumber's work and it goes into the same schedule. If the tub is sound, it stays and we protect it during demo and tile.
Recent JMB work, from our job log
59 installs recorded across 30 Twin Cities communities since Dec 2025. Window and door installs for homeowners and for the builders and dealers we sub for. Counts come straight from our job log; no customer names.
Get a written quote for this job
Three photos and a sentence is enough. You hear back within one business day. Or text the photos to 763-204-2099.
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Read morePage reviewed September 26, 2026 · JMB Builders LLC, MN license BC809005 · All tile pages
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