Solar · Fitting
Is my roof strong enough for solar panels?
Short answer
Most modern trussed and simple cut roofs can take panels, but MCS requires a competent check of loads. A structural engineer is needed for hips and valleys, asymmetric roofs, signs of sagging, altered timbers, heavier re-roofs, pitches under 30 degrees or snow-trapping features, and for ballasted flat-roof systems.
Last checked 24 September 2026 · 1 source
In more detail
- MIS 3002 Table 1: trussed rafter method uses 0.785 kN/m2 dead load minus covering.
- 5.9.6 unusual structure list.
- Panels kept 400 mm from edges unless extra measures (5.9.7).
The facts, dated
- 01Modules not within 400 mm of any domestic roof edge unless specific measures taken — 400 mm
standard · UK · checked 24 September 2026 · MCS
- 02Trussed rafter check assumes typical design dead load — 0.785 kN/m2
standard · UK · checked 24 September 2026 · MCS
Sources
Last checked: 24 September 2026