Roof flashing should be assessed as part of a roof replacement, with the planned work listed in the estimate. Replacing the shingles does not, by itself, tell you which flashing will be replaced or left in place.
GAF recommends replacing metal flashing whenever possible, while allowing reuse in some circumstances after qualified inspection. Its guidance considers the metal's condition, expected remaining service and compatibility with the new shingles. Ask which requirements apply to the products proposed for your home. Source: GAF's metal flashing reuse bulletin.
For a Northeast Ohio homeowner comparing roof estimates, the useful goal is a clear answer for each roof detail: what stays, what changes and why.
Identify the flashing being discussed
Flashing helps direct water away from roof joints and openings. Different locations need different details, so a single line that says “flashing included” can leave questions unanswered.
At a roof-to-wall junction, step flashing works with the shingle courses, and counterflashing protects the upper part of the flashing assembly. Valleys and pipes passing through the roof have their own details. GAF's proper flashing bulletin distinguishes these locations and emphasizes matching the detail to the roofing product.
Ask the estimator to label the relevant areas on a photo or simple sketch. “The chimney above the living room” or “the wall beside the garage roof” is easier to track across two proposals than an unexplained material quantity. Include only the features your home actually has.
If reuse is proposed, ask for the basis
Have the contractor identify the specific pieces they intend to retain and explain how they assessed them. A distant roof photo is useful for orientation, but it is not a condition report for concealed metal.
GAF's reuse bulletin calls out corrosion, physical damage and deterioration. It also notes that step flashing may need replacement because its size does not suit the new shingles, even if the metal otherwise looks sound. Removal work can damage existing pieces. These are reasons to discuss both the initial plan and what happens if the findings change. Read the inspection considerations.
A useful question is: “What would make you change this item from reuse to replacement, and how would you show me?” Ask for that answer before the work starts.
Use a location-by-location scope sheet
Use the same list when reviewing each proposal. Ask the contractor to mark an item “not applicable” when it is absent and “not yet assessed” when its condition is unknown.
| Roof detail, if present | What to clarify in the estimate |
|---|---|
| Roof meeting a sidewall or dormer | Which flashing pieces will be new, and which existing pieces are proposed for reuse? |
| Chimney junction | What work is included around the chimney, and is any separate masonry work excluded? |
| Plumbing pipes or other roof penetrations | Which flashing assemblies will be replaced, and are all openings accounted for? |
| Skylights | Does the scope address the flashing, the skylight itself, or both? |
| Roof valleys and edges | Which materials and details are included at these locations? |
| Surrounding siding or trim | If access requires disturbing it, who removes, reinstalls or replaces it? |
For each row, record the answer from each contractor and any remaining question. An omitted item is a reason to ask for clarification; it is not proof that the contractor intends to skip it.
Agree on how hidden findings will be handled
Ask what can be assessed before removal and what must be confirmed during the job. Have the proposal explain how additional work will be documented, priced and approved. A photo of the exposed condition, a description of the proposed work and your written decision create a clearer record than an unexpected line on the final bill.
If surrounding wall materials or another trade may be involved, ask who is responsible for that work. Keep those responsibilities with the roofing scope so there is a named next step when something is uncovered.
The removal decision is a separate part of the estimate. Our roof tear-off versus overlay guide explains that comparison. If gutters are also under consideration, review the roof and gutter planning guide.
Bring the questions to your roofing estimate
Gather any earlier roof estimates, repair records and photos you already have. Note the location of past leaks without assuming which component caused them. You can prepare these notes from inside the home and at ground level; leave roof access to the person assessing the work.
Solo provides roofing services in Northeast Ohio. If you are planning a roof replacement, request an on-site estimate and bring your questions about flashing so the written scope addresses the details of your home.