THE SHORT ANSWER
DOE severe-weather guidance emphasizes mechanical attachment to the building structure for rooftop PV exposed to wind. The project design must match the actual roof. [1]
Trace the load path
Ask the drawing to show module, clamp, rail, attachment, roof framing and building connection. Each interface should have defined hardware and installation requirements.
Identify roof construction
Document sheathing, framing type, spacing, roof covering, deck condition and attic access where relevant. Assumptions should be verified through the project’s qualified professionals.
Coordinate waterproofing
Separate structural attachment from flashing and roof-warranty responsibilities. Specify approved details for the roof material and record who inspects the completed penetrations.
Control field changes
A missed framing member or changed layout can affect the designed load path. Require documented correction and approval rather than unrecorded field improvisation.
Before your next conversation
- Trace every structural interface.
- Verify roof construction.
- Document waterproofing responsibility.
- Approve field changes.
Primary sources
- U.S. Department of Energy: Severe Weather Resilience in Solar PV System Design
Primary source reviewed September 11, 2026. Confirm current utility, permit, equipment and property requirements before relying on a project timeline or design.
Planning examples and questions are Origin’s editorial guidance, not a property-specific diagnosis, engineering design, tax determination or promise of savings. Manufacturer and utility references do not imply an affiliation with Origin.
Make the decision specific to your home.
Coordinate solar and roofing design with Origin.
Book an Origin Direct review →Scope, pricing and availability are confirmed for your property. A request is not a confirmed appointment.