Step flashing at walls
Individual pieces overlap with the shingle courses. A repair can require lifting enough covering and wall material to restore that sequence.

Flashing carries rain past the places where the roof is interrupted. A failed joint needs its water path restored.
Shingles work in overlapping courses. At a wall or penetration, shaped flashing continues that water path around the interruption. When the flashing separates, corrodes or is covered in the wrong order, water can travel behind a surface that looks sealed from above.
We check the joint as an assembly. The visible metal, adjoining shingles, underlayment and the wall’s drainage layer need to connect in the right sequence. More surface sealant is not a substitute for a missing lap.

The repair follows the type of joint rather than one universal patch.
Individual pieces overlap with the shingle courses. A repair can require lifting enough covering and wall material to restore that sequence.
The upper detail protects the top of base or step flashing. A loose termination can admit water behind otherwise sound roof work.
Boots and transition metal must fit the opening, covering and movement. Compatible replacement details matter more than a bead of sealant.
Access to the concealed side of a joint often determines how much work is required.
Brittle shingles or several layers complicate removal and reinstallation around the metal.
Deteriorated sheathing, siding or masonry interfaces can add work outside a simple metal replacement.
If the surrounding roof is already being replaced, the flashing can be planned with the new assembly rather than worked around old covering.
The detail is assessed for condition, shape and integration. Failed or incompatible material needs replacement; a sound component might be retained when it can form the required connection.
Sealant has a role in specified details, but it cannot replace missing step flashing or rebuild a reversed water-shedding lap. The repair needs to address the joint itself.

Share where water is showing up. A free inspection can explain the flashing work and the surrounding repair.