Flat-roof solar without a certified kit: what your clause 5.5.5 file has to show
A bylined piece by our Managing Director for MCS installers, on pages 22 and 23 of the November 2026 issue. MCS has extended the use of clause 5.5.5 of MIS 3002 for uncertified flat roof mounting kits until further notice, and V6.0 turned that clause into a list of evidence the contractor must be able to produce. The article works through the ballasted case under clause 5.9.13: wind actions set for the actual site, a friction coefficient of 0.3 unless a higher value is backed by a test report, and a qualified structural engineer consulted on whether the roof can carry the system and its ballast, with no size threshold. It closes with what to keep on file.
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