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Yeah big steels, we are the ground floor of a 5 story building. 11 party structure agreements. huge temporary works/foundations. Its been painful and slow. On the home stretch now, just the simple task of refurbishing all the internals. :)
I think we'll get someone to spray it on. The finish is apparently much better. Spraying intumescent is a specialist trade, probably for a reason.
Oof! That's a lot of big iron. I used Envirograf intumescent coating on the exposed steels. The finish is absolutely shit, goes on like porridge, so needs sanding back before painting over with whichever top coat you choose.
Your floor's looking really good. Would love to see more details of your project!