Solution
dBA decided that the best solution would be to manufacture aluminum plates filled with fireproof material and acoustic filling, all in situ around what was already there inside and out.
dBA installed pre manufactured Aluminum plates on both sides. The GIS was on and required the plates to be fitted while they were live so extra care and attention from our experienced fitters who are used to working in the substation environment. Including putting in Kingspan flashing details.
dBA successfully installed a waterproof, attenuated, electrically safe installation with a very happy customer in the end.