How to Assess a Low-Load Roof Before Solar Module Selection

Step 1 — Establish the roof baseline

Collect drawings, roof type, substrate, sheet profile, slope or curvature, building height, age, repairs, corrosion, leakage history and remaining service life. Confirm that documents match the actual roof.

Step 2 — Verify structural capacity

Use a qualified structural review to confirm allowable loads and weak zones. Check purlins, deck, connections and load paths; do not infer capacity from the building type or module weight.

Step 3 — Build the complete load case

Include modules, fixing system, cables, inverters, walkways, ballast where applicable, snow and temporary installation loads. Compare both total load and local load distribution.

Step 4 — Evaluate wind and roof zones

Edge and corner zones often see higher suction. Use project location, height and local code values to determine fixing density and layout. A solution suitable in the field zone may not be adequate at the perimeter.

Step 5 — Protect waterproofing and operations

Review drainage, penetrations, adhesive compatibility, fire paths, maintenance access, fall protection and future roof repair. Stop the project if critical data are missing or the roof condition is unsuitable.

Selection output

Only after these checks should the team compare the frameless flexible and framed lightweight XSFM-560-T2 configurations. Final approval remains project-specific.