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Wall Waterproofing — It’s Not Just for the Shower Area

Waterproofing is often associated only with wet areas like shower walls, but real‑world cases show that water penetration can occur on other walls too due to heavy use and continuous moisture exposure. For example, walls in high‑usage bathrooms without showers can absorb substantial water when buckets or pails are used frequently, causing moisture to accumulate and eventually seep through the structure. Effective waterproofing must consider the function and usage patterns of every area, not just the shower. A waterproof system applied correctly helps reduce lateral water migration and prevents long‑term damage that leads to leaks, mould and costly repairs.

Wall waterproofing, not just shower area…

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Wall waterproofing, not just shower area…

Usually, it is specified that waterproofing system be laid up to 1.5m high on wall, at shower areas. This is to prevent water splashes from penetrating through the wall leading to water leakage problem. On other areas, an upturn of 30cm on wall is common to prevent lateral water leakage out of the wet area.

However, a client recently shared that water penetration through wall can happen even on non-shower area. In one of his projects, a workers’ dormitory, water leaks through the bathrooms without shower. With the high numbers of workers staying there, the bathroom usage is very high and frequent. Even by using only pails during bath, the amount of water being absorbed by the wall is significant. Without getting the time to dry off, the accumulated moist and wetness eventually seeps through the wall.

This is a good lesson to share that an effective waterproofing system must take into consideration of the function, usage and occupants of the building.

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Protect More Than Just the Shower — Waterproof Walls Wisely

Proper wall waterproofing extends protection beyond the shower area to any surface regularly exposed to water and moisture. By assessing usage and potential water exposure, you can determine the right waterproofing strategy for each wall. Effective waterproofing safeguards building integrity, prevents structural deterioration, and reduces the likelihood of recurring leakage problems — saving maintenance time and costs in the long run. Invest in a thoughtful waterproofing solution that covers not only traditional wet areas but also other high‑risk walls for a fully protected space.