What the roof survey should confirm
The roof part of a solar panel survey is there to remove obvious unknowns before the job reaches design or installation planning. It should show what the roof is like, how panels could fit, and what might block a clean installation.
| Check | What it tells the installer | Why it matters |
|---|---|---|
| Roof condition | Visible age, damage, moss, sagging, missing tiles, or fragile areas. | A roof that needs remedial work should be flagged before panels are fitted. |
| Usable roof area | Available space after rooflights, chimneys, vents, valleys, hips, and dormers are considered. | Panel count depends on the usable area, not just the roof size seen from satellite imagery. |
| Access and scaffold context | How the roof can be reached and whether conservatories, extensions, boundaries, or rear access create constraints. | Access can change cost and scheduling even when the roof layout looks simple. |
| Shading and obstructions | Trees, neighbouring buildings, chimneys, aerials, and roof geometry that affect the proposed layout. | Shading can change array layout, optimiser decisions, and expected generation. |
| Cable and equipment route | Likely route from panels to inverter, battery, consumer unit, and meter position. | The roof and electrical route need to work together before the quote is firm. |
When roof evidence is not enough on its own
A normal solar survey can capture visible roof condition and practical constraints, but it should not pretend to be a structural calculation. If the roof looks weak, unusually old, altered, overloaded, or otherwise uncertain, the installer should ask for the right competent structural advice before the final installation decision is made.
That distinction matters. The survey can show warning signs and document the roof clearly; the installer still owns the decision about what extra checks are needed for the job.
How this fits into the solar survey route
The roof survey is one part of the bigger solar site check. A useful solar survey should also cover electrical intake evidence, possible inverter location, battery context where relevant, cable routing, access notes, and the report output the design team will actually use.
If the buyer is asking about price, the solar survey cost page explains the current guide pricing and what can move the quote. If the question is what to capture on site, the solar roof assessment guide and solar PV survey checklist are the next two useful pages.