Path-Q Solar
What roof and structural information should I gather before asking for a rooftop solar design?
Answer
Gather roof age, material, condition, dimensions, slopes, orientations, obstructions, repair history, and any available structural or building plans. Also collect electricity-use data and information about future loads, because the design must fit both the roof and the intended system size.
Key points
- Record roof material, age, warranty, repairs, leaks, and planned replacement timing.
- Provide roof plans, measurements, photographs, roof pitch, orientations, and locations of vents, skylights, chimneys, and access paths.
- Identify structural plans, prior alterations, unusual framing, and any known load or damage concerns.
- Share utility bills, future electrification plans, and the desired ownership or financing approach.
What it depends on
- Availability and accuracy of roof measurements and building records
- Roof condition and structural characteristics
- Current and expected electricity consumption
- The installer’s design and documentation requirements
Risks and trade-offs
- Incomplete roof information can lead to inaccurate panel counts, redesigns, or change orders.
- A roof nearing replacement may make a solar installation less economical until roofing work is addressed.
- A production target based only on roof area may not match actual electricity needs.
Information you may need
- Roof age, material, dimensions, slope, orientation, and repair history
- Photos, plans, obstruction locations, and shading information
- Structural documents or prior inspection findings
- At least a representative history of electricity bills and planned future loads
Your next step
What to do next
Create a roof-and-usage information packet and send the same materials to multiple installers for comparable site-specific designs.
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SQ00240