Path-Q Solar
What structural information is needed for solar on an older home?
Answer
Useful information includes roof framing, sheathing, roofing layers, prior alterations, damage or repairs, and any available drawings or inspection reports. If records are incomplete, the installer may need a site inspection and a structural professional's assessment before approving the design.
Key points
- The review should address both gravity loads and attachment forces.
- Older homes may have undocumented additions, framing changes, or deterioration.
- Roof age and condition are separate from the building's overall age.
What it depends on
- Home and roof construction date
- Available plans, permits, and prior inspection records
- Roof condition and proposed attachment locations
- System weight and site-specific structural forces
Risks and trade-offs
- Missing documentation can lengthen design and increase assessment costs.
- Unrecognized alterations or damage can require repair before installation.
- A conservative design may reduce panel placement but improve reliability.
Information you may need
- Architectural or structural drawings
- Roofing and renovation history
- Evidence of leaks, sagging, rot, or prior damage
- Proposed system weight and attachment plan
Your next step
What to do next
Collect existing records and ask the installer what structural documentation or inspection is required for the specific roof.
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SQ00909