Window sills should be sloped toward the room at an angle of how many degrees for simplified cleanliness?

The correct choice of 30 degrees for sloping window sills is important for promoting cleanliness. A slope of 30 degrees is adequate to facilitate proper drainage, preventing water from pooling and reducing the likelihood of mold and mildew development. This angle strikes a balance between being steep enough to allow water to flow away efficiently, while still being manageable for cleaning and maintenance purposes.

A slope that's too shallow might not effectively direct water away, increasing the risk of accumulation, while a steeper slope could make cleaning more difficult, as it may be challenging to wipe down the surface thoroughly. Therefore, the 30-degree angle is a practical standard that supports both hygiene and ease of maintenance in residential settings.