Where should flashing be installed when it is practical?

Flashing is a critical component of building construction that serves to direct water away from certain areas, preventing leaks and moisture intrusion. Installing flashing "at any opening where water could enter" is essential because it addresses potential vulnerabilities in the building envelope. This includes areas such as:

• Around windows and doors to prevent water from seeping in.

• At roof valleys and around chimneys to manage water flow effectively.

• Along the transition points where different materials meet, such as where siding meets roofs or decks.

By ensuring that flashing is installed in all these critical areas, the building is better protected from water damage, which can lead to serious issues such as mold, rot, and structural damage over time. The inclusion of flashing creates a barrier that effectively channels water away, enhancing the durability and longevity of the structure.

In contrast, focusing on flashing solely at the roof level, at the meeting points of siding and foundation, or only beneath wood coverings does not provide comprehensive protection. It's essential to recognize that water can enter a building through various openings, and therefore, the approach should be holistic, addressing all potential points of entry.