Mounting, Structural & Roof Integration
Roof attachments, flashing, structural loads, wire management, maintenance practices, and site assessment.
- Describe roof attachment methods and flashing best practices
- Explain structural load considerations for PV arrays
- Describe wire management and airflow for module cooling
- Identify maintenance practices that maximize production
- Explain shading analysis purpose and roof attachment spacing
Leçon 1
Roof Attachment Methods & Flashing
Roof Attachment Best Practice
A common roof attachment best practice is to use lag bolts into rafters with properly flashed and sealed mounting feet. The attachment must penetrate the roof decking into structural members (rafters or trusses) to support the dead load of the array and the live loads from wind and snow.
Flashing is a waterproofing component installed around each roof penetration. Roof penetrations should be sealed with flashing that integrates under the roofing material above and over the material below, creating a watershed path that prevents leaks.
Roof Attachment Spacing
What should be verified for roof attachment spacing is that the spacing matches the structural engineering calculations for the design wind and snow loads. Attachments that are too far apart may not support the array under extreme weather, while overly close spacing creates unnecessary roof penetrations.
Roof attachments must penetrate into rafters or structural members with proper flashing for waterproofing. Verify attachment spacing matches structural engineering requirements for wind and snow loads.