Shower Receptors key terms

The floor assembly of a shower that receives and directs water to the drain, including the sloped surface, waterproofing, and the finished tile or solid surface above it.

A manufactured shower base with a factory-formed slope toward the drain, often made of expanded polystyrene or cementitious foam, designed to receive a waterproof membrane and tile.

A mixture of sand and cement placed over a substrate to create a sloped or level surface that supports tile or a waterproof membrane in a shower assembly.

The downward pitch of a shower floor measured from the perimeter to the drain, intended to move water toward the outlet and prevent pooling on the surface.

The complete drain component of a shower, including the strainer, clamping ring, weep holes, and body, that connects the receptor to the drainage system.

A drain fitting with a lower flange and a bolt-down upper ring that sandwich the waterproof membrane between them to create a mechanical seal at the drain opening.

Small openings in the lower flange of a clamping ring drain that allow water trapped in the mortar bed above the membrane to escape into the drain.

A continuous barrier of sheet or liquid material installed over the shower substrate to prevent water from penetrating into framing or adjacent construction.

A waterproofing membrane adhered directly to the substrate with thin-set or adhesive so that no continuous void exists between the membrane and the surface beneath it.

A sheet material with a geometric structure that separates the tile from the substrate, accommodating movement while allowing water vapor to escape; not a substitute for waterproofing in a shower.

A trowel- or roller-applied coating that cures into a seamless waterproof layer, typically requiring multiple coats at a specified wet or dry film thickness.

A waterproof material used at transitions and penetrations, such as curbs, corners, and niches, to maintain continuity of the waterproofing system and prevent water intrusion at those junctions.

The raised threshold at the entry of a shower that retains water inside the receptor and provides a surface for the shower door or enclosure to seal against.

A flexible sheet membrane, commonly PVC or CPE, installed over a pre-sloped mortar bed and clamped at the drain to form the concealed waterproofing layer of a traditional shower pan.

The first sloped mortar layer in a traditional shower pan, placed beneath the liner so that any water reaching the membrane flows to the weep holes.

The structural surface to which the shower receptor assembly is applied, such as a plywood subfloor, concrete slab, or cement backer board.

The structural floor decking of a building that supports the shower receptor, mortar bed, and finish materials and must be rigid enough to limit deflection.

A cementitious or fiber-cement panel installed over framing as a substrate for waterproofing and tile in wet areas, resistant to moisture damage.

The amount a floor structure bends under load; excessive deflection in a shower floor can crack mortar, membranes, and tile.

A cementitious adhesive mixed with water or latex additive and applied in a thin layer to bond tile or membrane to a substrate.

Tile with at least one edge of 15 inches or more, which requires greater substrate flatness and higher mortar coverage to avoid lippage and bond failure.

The difference in height between adjacent tiles at their edges, which can create a trip hazard or water trap and is controlled by flat substrate and careful setting.

A test in which the shower receptor is filled with water to a specified depth and observed for a set period to confirm the waterproofing is watertight.

A formal review of the installed shower assembly by a qualified party to verify compliance with codes, plans, and manufacturer instructions before concealment.

The stage of construction in which framing, plumbing, and drain components are installed before the receptor, waterproofing, and finish are applied.

A material that restricts moisture vapor movement through an assembly, distinct from a waterproofing membrane that blocks liquid water.

A small sloped or peaked structure built at a transition or obstruction to divert water, sometimes used at shower curbs or niches to shed water.

A recessed storage area built into a shower wall that must be fully waterproofed and flashed at all edges and corners before tile is installed.

A shower with no raised threshold, where the floor slopes continuously to the drain and the surrounding floor must be waterproofed and sloped accordingly.

A long, narrow drain set along one edge or the center of a shower floor, allowing a single-direction slope and larger tile to be used.

A conventional drain located at a single point in the shower floor, requiring the floor to slope toward that point from all directions.

The period a material such as mortar, adhesive, or liquid membrane must set undisturbed to reach adequate strength or waterproof performance before the next step.

The process of correcting defective shower receptor work, such as removing failed tile or membrane and reinstalling components to restore waterproofing and function.

Gear such as gloves, eye protection, and respirators worn during demolition, mixing, and membrane application to reduce exposure to dust and chemicals.

The published installation requirements of a product's maker, which govern acceptable substrates, application methods, and curing and must be followed for compliance.

The legally adopted set of regulations establishing minimum requirements for shower construction, waterproofing, and plumbing, enforced through permits and inspections.