Path-Q Solar
What structural information is needed before installing solar on a clay or concrete tile roof?
Answer
The installer needs the roof framing and load information, tile type and condition, underlayment and deck condition, roof geometry and pitch, attachment locations, and access constraints. The design should account for panel and racking loads, wind and other site forces, concentrated attachment loads, and the method for protecting or replacing tiles.
Key points
- Document rafter or truss layout, spans, spacing, connections, and any prior alterations where available.
- Inspect tiles, battens, underlayment, decking, flashing, and penetrations for brittleness or deterioration.
- Confirm how tiles will be removed, cut, replaced, or worked around without creating leaks.
- Include roof condition and remaining service life in the installation decision.
What it depends on
- Tile material, profile, age, and condition
- Roof framing and attachment strategy
- System size, layout, and equipment weight
- Wind, snow, seismic, and other site loads
Risks and trade-offs
- Brittle tiles can break during installation or future maintenance.
- A structurally adequate roof may still need repair or underlayment work before mounting.
- Concealed framing or undocumented alterations can increase design uncertainty and cost.
Information you may need
- Roof and framing plans or prior structural records
- Tile and underlayment inspection
- Proposed system layout and racking details
- Site-specific load and access assumptions
Your next step
What to do next
Request a written tile-roof and structural assessment that identifies attachment points, tile-handling procedures, repairs, and any required engineering review.
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