Water can seep into the basement and other parts of a building. Else, water may enter a building by other means. The presence of this water can cause structural damage to a building, and it can compromise the health of the inhabitants by encouraging mould and fungus.
- Rain water can run into the basement, and then get into the floor or subfloor. This is more common in buildings where the ground slopes towards the walls.
- Water in the ground will seep into the basement, and then into the rest of the building above. Against, this is more common in buildings where the ground slopes towards the walls.
- Basement windows can let in water, especially if close to ground level.
- Water from the concrete floor slab, left over from the construction, phase can be an issue.
- Concrete is porous, so water can seem in from the ground by capillary action.
- Humid air outside can condense in the cooler conditions in the basement of lower levels of a building.
- Warm air rising in the house can create a low pressure environment in the basement, which pull in water the outside.
- Water from plumbing can leak.
- Clothes driers need proper outside ventilation lest they put moisture into the internal air.
- Moisture from cooking
- Moisture from steam in bathrooms
- Moisture from baths, showers and spas.
Tiled floors need proper sealing lest there are moisture issues. This includes plastic sheeting beneath the tiles and silicone edges. The tiles and grout must also be waterproof, which may require sealing.
The basement beneath the tiled floor must also be waterproofed, or moisture may seep up beneath the floor.
Kitchen tiles need proper sealing in the same manner as bathroom tiles. Any moisture from cooking equipment needs to be removed with an extractor fan.