Missing caulk at the shower step is a common oversight #homeinspection #tile #bathroom

The step to a tiled shower should generally not be grouted. Instead, it's common to use a flexible and waterproof material like caulk or silicone sealant to fill the joint between the step and the adjacent tiles. Grout is a rigid material that can crack over time due to movement or settling, and the step area is a common location for such movement.

Water getting underneath tiles in a shower floor can lead to several potential issues:

Water Damage: Water that penetrates underneath tiles can lead to damage to the substrate (such as cement board or mortar) over time. This can weaken the structural integrity of the shower floor and surrounding areas.

Mold and Mildew Growth: Moisture trapped underneath tiles can create a conducive environment for mold and mildew growth. This not only compromises the appearance of the shower but can also pose health risks.

Tile Disbonding: If water continues to accumulate beneath the tiles, it can weaken the adhesive that holds the tiles in place, causing them to come loose or pop off.

Grout Deterioration: If water penetrates grout lines, it can cause the grout to deteriorate and crack. This can lead to further water infiltration and exacerbate the issues mentioned above.

To prevent water from getting underneath tiles and causing these problems, it's crucial to ensure proper waterproofing and sealing in your shower:

Waterproofing Membrane: A waterproofing membrane should be installed beneath the tile to create a barrier that prevents water from penetrating the substrate. This is especially important in shower floors and areas prone to water exposure.

Shower Pan Liner: In shower floors, a shower pan liner is typically installed beneath the mortar bed to channel water toward the drain. This prevents water from seeping into the subfloor.

Caulk or Silicone Sealant: As mentioned earlier, use caulk or silicone sealant around joints, edges, and corners, including the step area. These flexible materials will provide a water-resistant barrier while allowing for some movement.

Grout Sealing: Even though grout lines should not be used to prevent water penetration, they should still be properly sealed to protect against staining and moisture absorption.