What is the correct order of installation for flashing on a roof?

The correct order of installation for flashing on a roof is crucial to ensure proper waterproofing and to prevent leaks. Starting with eave flashing is important as it protects the roof edges from water intrusion. Following that with underlayment serves as an additional barrier against water, providing extra protection under the roofing material.

Rake flashing is then placed to protect the gable ends and direct water away from the roof structure. Continuing with valley flashing is essential when dealing with areas where two roof planes meet, as this is a common spot for water accumulation.

Including plumbing rubber flashing and counter flashing is vital for areas around plumbing stacks and walls, reinforcing the waterproofing in these critical areas. Each of these components plays a role in the overall integrity of the roofing system, ensuring that water is redirected away from vulnerable points. Thus, this order facilitates maximum efficacy in preventing water intrusion and extending the lifespan of the roofing system.