Plan the roof and solar together
Should you replace your roof before installing solar panels?
Have the roof assessed before agreeing on the solar design. If repairs or replacement are needed, coordinate the scope and responsibilities before panels cover the working area.
Prepare for the assessment ↓
What to check before putting solar panels on a roof
Roof age is background information, not a condition report. Collect the installation date if known, repair records, leak history and existing warranty. Ask the solar installer and a qualified roofing professional to identify necessary work and explain how it affects the panel layout.
The Department of Energy recommends checking roof condition and responsibility for damage or leaks. Ask for roof repairs to be included in the proposal where needed.
Questions for the roofer
- Which areas need repair or replacement, and what evidence supports that recommendation?
- What work must happen before the solar mounting system is installed?
- How will the proposed solar installation affect the roof warranty?
- Who should inspect the roof after solar work is complete?
Questions for the solar installer
- Has the quoted layout been checked against the actual roof?
- Who coordinates mounting details with the roofing contractor?
- Which roof-related costs are included, excluded or still provisional?
- Who is the first contact for a leak after installation?
Keep observations and unanswered questions in one brief. Avoid climbing onto the roof yourself to collect information; ask the professionals for their assessment records.
Compare roof-first and later replacement scopes
Ask for two written scopes if the timing is uncertain. The useful comparison is the work each option requires, not a universal roof-age cutoff.
Option A: roof work before solar installation
List roof work, solar installation and coordination separately. Confirm who accepts the completed roof work before mounting begins. Ask how a roofing delay changes the solar schedule.
Option B: solar now, roof work later
Request a description of how the panels would be removed and reinstalled, who could do that work and which warranty or approval questions would need checking at that time. A current estimate for future work is not a guaranteed future price.
Solar panel removal and reinstallation: what belongs in the estimate?
Ask the contractor to itemize the proposed work rather than accepting one unexplained total. Use this request list to establish what their price actually covers:
- Disconnecting the system and removing panels and mounting components.
- Transport or secure storage, with responsibility for damage.
- Replacement mounting components and any proposed equipment changes.
- Reinstallation, testing and monitoring restoration.
- Any required permit, inspection or utility coordination, as confirmed for your project.
Keep this cost separate from the solar array price. The solar-only price-per-watt calculation cannot compare roof work fairly. Do not subtract an estimated roof cost from a bundled quote unless the installer has supplied a reliable breakdown.
Get responsibility for the roof in writing
Record the roofing company, solar company, agreed sequence, inspection handoff and claim contacts. Ask each company to explain its own warranty and any exclusions involving the other contractor's work.
Next, use the solar warranty questions and installation milestones to complete your project brief. Installers can use our proposal scope template to make these responsibilities visible.
Reviewed November 11, 2026. This is a planning checklist, not an inspection or a roof-life estimate. The appropriate scope must be established for your property. Image is illustrative.