Shower niches and benches

What holds the niche and the bench in place

A niche is not cut into an existing wall after the fact. We frame it when the shower is open to the studs, blocking between two studs with horizontal lumber screwed to the king studs on both sides. That box becomes the back, bottom, top and sides of the recess. A bench gets its own framing too, usually a short wall built out from the back wall or across a corner, tied into the floor plate and lagged into the studs behind it. If the bench is floating, meaning no legs down to the floor, the framing cantilevers out and every fastener matters. We use construction screws rated for wet areas, and we check every connection with a level before a single sheet of backer board goes up. The framing sets where the tile will land. If a stud is twisted or the blocking sits proud, the finished tile will telegraph that mistake. We straighten or shim anything that is off because the waterproofing and the tile both need a flat plane to begin with. On a remodel where the walls are already closed, we open only what is necessary, frame the new cavity, and tie the existing framing together so nothing moves after the tile is set.

Slope on the sill and the bench so water leaves the tile

Flat surfaces inside a shower collect water. A niche sill and a bench top both need fall, and that fall is built into the substrate before we spread any thinset. For a niche sill we rip the backer board or the solid waterproof panel at a slope of roughly one quarter inch per foot toward the front edge. On a bench top the slope runs the same way, pitched so any water that lands on it drains into the shower pan and not back toward the wall or onto the lap of whoever sits there. We check the slope with a digital level after the board is fastened and again after the waterproof membrane is bonded over it. Tile set on a dead flat sill will hold a bead of water along the grout line and eventually feed mold or efflorescence. The quarter inch per foot rule is small enough that your shampoo bottle does not slide off but steep enough that water does not pool. Inside a niche we also slope the bottom tile row so the finished surface matches the pitch of the substrate. The back wall of the niche stays plumb, the sides stay plumb, only the bottom tilts. A bench follows the same logic. The horizontal surface gets the pitch, and the vertical face below it hangs straight so the layout does not look skewed.

Waterproofing a bench so it does not wick

A bench is the wettest horizontal surface in a shower outside the floor pan. If water gets behind the tile on a bench, it migrates sideways into the adjoining walls and wicks upward through the backer board. We waterproof a bench as part of one continuous membrane that ties the bench, the walls, and the shower pan together with no gaps. The membrane rolls over the bench top, down the front face, and laps onto the floor membrane at least four inches. Every corner gets a preformed band or a piece of membrane folded and bonded with the manufacturer’s sealant. We do not rely on caulk alone to keep water out. The water stays inside the tile assembly and runs down the membrane to the drain. Inside a niche we waterproof the entire box: back, top, bottom, and sides. The seams between the niche and the wall membrane get the same treatment. If the niche has a shelf, we cut the membrane around it and seal the penetration. On a bench we pay extra attention to the junction where the bench meets the back wall because that is where water sits when someone is showering. The membrane turns up the wall at least six inches behind the bench, and the wall membrane overlaps it so water cannot sneak behind the lap. The whole system is tested with a flood test on the pan before tile is set, and we inspect the bench and niche seams with a moisture meter after the fact on a few jobs just to confirm the bond.

Tile layout inside the niche and how the trim edge finishes it

The niche is one of the first things you see when you step into a shower, so the tile layout inside it has to match the wall pattern without looking like an afterthought. We measure from the centerline of the niche and dry lay the pieces so the cuts land symmetrical on the left and right. If the wall tile is a horizontal stack bond, the niche back usually continues that bond straight through. If it is a herringbone or a vertical stack, we fold the pattern into the recess so the grout lines align where they can. The bottom sill tile gets mitered or finished with a profile that turns the edge clean. A trim edge is a metal or PVC profile that caps the exposed perimeter of the niche. We set the profile into thinset at the same time we set the field tile so it bonds as one assembly. Brass and satin profiles are what we stock most often, and they come in square or round edge shapes. The profile sits flush with the face of the wall tile and wraps inside the niche about half an inch. That gives you a crisp line that hides the cut edges of the tile and protects the corner from chipping. On a bench the front edge and the top edge where it meets the wall can both take a profile if the design calls for it, or we can miter the tile and leave a tight grout joint. Either way, the edge is detailed before the grout goes in so nobody is filling gaps with caulk later.

Getting a number for a niche and bench build

Niches and benches vary too much to nail them to a flat price on a website. A single rectangular niche in a standard stud bay is one thing. A double niche with a shelf, or a corner bench wrapped on two sides, is another. We need to see the framing or at least the plan before we can give you a straight quote. Call (512) 297-7493 or write to info@merlanstile.com and we will set a time to look at the room, measure the actual space, and talk about what you want the finished piece to look like. We will write you a number that covers all the labor, the substrate, the waterproof membrane, the profile, the thinset, the grout and the sealer. Tile material itself is bought out of the supply house in Temple, and you pick exactly what you want. That cost is separate and you pay it at the supplier, so we never mark up the tile. For reference, a full tub surround done in tile, which includes the substrate, waterproofing, setting, grouting and sealing, runs at $2,000 flat. A niche added into that surround, or a bench built inside a larger shower, gets quoted on top of the base work after we see the layout. We do not quote these over the phone sight unseen because the framing conditions dictate half the labor.