When you draw details to communicate to others how the project is built, you need to show how the materials join together how their fixed and how you intend to keep the water out. It might not seem a big issue, but keeping out water is one of the fundamental problems in detailing. Water can cause structural and health problems.
The five most common ways for water to enter the building are:
- capillary action
- surface tension
- kinetic energy
- pressure differential