What does the term 'flashing' refer to in roofing?

Flashing is a critical component in roofing that involves sealing around roof penetrations, such as chimneys, vents, and skylights, to prevent water leaks. It is typically made of metal or other waterproof materials and acts as a barrier against water infiltration. Flashing is installed at critical junctions where two surfaces meet, ensuring that water is directed away from these vulnerable areas and does not seep into the structure.

Understanding the function of flashing is essential because roof penetrations are common sources of leaks if not properly protected. The design and installation of flashing are crucial to maintaining the integrity of the roof and safeguarding the interior of the building from potential water damage. This knowledge is particularly important for roofing professionals and contractors to ensure compliance with building codes and to uphold the quality of their work.