A roof solar suitability checklist helps identify obvious fit issues before quotes become confusing. It cannot replace an installer site survey, structural review, or electrical design, but it can prepare better questions.
Use this checklist before requesting proposals and again when reviewing site-survey notes.
Roof age and condition
Check:
- Approximate roof age.
- Roofing material.
- Visible leaks, broken tiles, soft decking, corrosion, or damaged flashing.
- Planned roof replacement or repair.
- Remaining roof warranty.
- Whether solar removal would affect future roof work.
If the roof may need replacement soon, resolve that before installing panels. Removing and reinstalling solar later can add cost and risk.
Roof shape and usable area
Look for:
- Large clear planes.
- Dormers, skylights, vents, chimneys, aerials, and roof windows.
- Setback requirements near ridges, edges, and fire-access pathways.
- Multiple small roof faces that may complicate wiring.
- Obstructions that reduce usable panel layout.
Panel count is not only about roof size. Layout, access rules, shade, and equipment placement all matter.
Direction, tilt, and shade
Record:
- Main roof direction.
- Roof pitch.
- Morning shade.
- Midday shade.
- Afternoon shade.
- Seasonal shade from trees or nearby buildings.
- Possible future shade from tree growth or construction.
Shade can affect output and equipment choice. A roof with partial shade may still work, but it needs more careful design.
Structure and loading
Ask whether the roof structure can support the proposed system, including racking and local wind or snow loads where relevant.
Watch for:
- Older roof framing.
- Previous structural repairs.
- Unpermitted alterations.
- Heavy roofing materials.
- High-wind or snow-prone areas.
- Flat roofs requiring ballast.
Do not rely on a visual roof photo for structural approval when the property has risk factors.
Electrical and equipment space
Check:
- Main electrical panel location.
- Spare breaker capacity.
- Meter location.
- Inverter location.
- Battery location if planned.
- Clearances, ventilation, and weather exposure.
- Conduit route from array to equipment.
- Internet or cellular signal for monitoring.
Electrical constraints can change cost, timeline, and design. A low quote that ignores panel upgrades or equipment clearances may be incomplete.
Access and installation conditions
Review:
- Ladder and scaffolding access.
- Driveway or staging area.
- Roof height and slope.
- Fragile surfaces.
- Nearby overhead lines.
- Local working-hour limits.
- Weather exposure.
Access difficulty can affect labor cost and safety planning.
Local approval risks
Ask about:
- Building permits.
- Electrical permits.
- Utility or network approval.
- HOA or architectural review.
- Historic district requirements.
- Fire code access pathways.
- Inspection sequence.
Approval rules can affect layout, timeline, and final permission to operate.
Homeowner notes to prepare
Before speaking to installers, gather:
- Recent electricity bills.
- Roof age or replacement records.
- Photos of roof planes and electrical panel.
- Home insurance contact.
- HOA documents if applicable.
- Planned EV, heat pump, pool, or battery additions.
- Known shade or roof issues.
Good information early reduces quote changes later.
Red flags before signing
Pause if a proposal:
- Ignores roof age.
- Promises output without shade discussion.
- Does not mention permits or utility approval.
- Combines roof repair and solar work without clear scope.
- Omits equipment locations.
- Avoids questions about electrical upgrades.
- Pressures signing before a site survey.
Use Is Your Roof Suitable For Solar Panels for the full explanation, then compare proposals with the Solar Quote Comparison Checklist.