The showers that need refinishing in Berkeley tend to fall into two camps. There are the molded fiberglass stalls dropped into 1980s and 1990s apartments around West Berkeley, Westbrae and the rentals near Southside — almond or bone-colored units where the gelcoat has faded, crazed into fine spiderweb cracking, and gone chalky no matter how hard you scrub. And there are the tiled showers in older homes around Elmwood, Claremont and the Berkeley Hills, where the tile is sound but the color is dated and the grout has darkened past cleaning. Both can be resurfaced in place, in a day, without ripping anything out.
Shower refinishing — also called reglazing or resurfacing — bonds a fresh acrylic-urethane finish to the surface you already have. On fiberglass and gelcoat, acid etch does nothing, so we scuff-sand the surface and use an adhesion promoter before the topcoat. On tile, we clean and etch the glaze and grout, apply a bond coat, then spray a sealed topcoat that takes a uniform new color across tile and grout alike. Either way the original surround stays on the wall and the shower never leaves the room.
A shower is a harder job than a tub. It has more vertical surface, inside corners that hold overspray, a pan that takes daily standing water, and almost always a crazed or mildewed area that has to be repaired before any coating goes on. Diego Sanchez has refinished roughly 280 Berkeley showers since 2014, and the prep — masking the surrounding walls, sanding every square inch, treating the crazing — is where the durable result is made.