Assessment, engineering and the inspection work that keeps it producing. One technician on site, then stamped structural and electrical.
A residential mistake costs you a truck roll. A commercial mistake costs you an engineering cycle, a crane day, or a roof warranty. The survey has to carry more weight because more is built on it.
Bar joist depth, spacing and span, deck gauge and column lines. None of it is visible from above, and all of it decides the attachment.
Condition, penetrations and drainage. Getting this wrong is not a design problem, it is a liability problem with the roofing manufacturer.
Available bus capacity and a real interconnection path, assessed in the electrical room rather than inferred from a one-line somebody drew years ago.
Same scope as residential at building scale, plus the inspection work that keeps the asset producing after it is energised.
A technician is physically on the property, not reading it off imagery. On the roof for membrane condition, penetrations and drainage. Inside for the structural assessment: bar joist depth, spacing and span, deck gauge, column lines. In the electrical room for switchgear, available bus capacity and the interconnection path. Access and lift constraints documented for the install crew.
Structural and electrical engineering off what was verified on site. Attachment design landed on the real framing. Permit sets stamped and sealed by a licensed professional engineer, structural and electrical, permit-ready six days from the survey.
Aerial thermal and electroluminescence at energisation, so you have a baseline. Defects found at commissioning are the installer's to fix. Defects found in year three are yours.
Periodic aerial thermal and module-level defect detection across the array. Detail on the inspection page.
On a commercial roof the expensive failure is not a missed module. It is a structural assumption that survives into a stamped drawing and gets caught by a plan reviewer, or worse, by an inspector after the attachments are in.
Every rejection cause we see traces back to capture rather than drafting. The list is in what goes in a permit package. Adding storage adds a second electrical investigation and a dimensional rulebook, covered in what a battery adds to the site survey.
Send a roof that gave you trouble and we will walk through what the survey should have caught.
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