New answers tagged planning
I am not a building professional, so I can't comment on how current these specs are but: The third line is 50mm Jablite, a brand of polystyrene sheet insulation. http://www.jablite.co.uk The next line is a 1200 g polythene damp proof membrane. The last line is 75mm hardcore (usually recycled concrete).
I'm only answering because an educated guess is hopefully better than no information at all. Is this in the UK? I'm not recognising some of the terms, and of course metric units are alien to us Yanks :) I hope you get a more definitive answer, but in the mean time... A 30mm screed topping layer just means it was struck off level, there is no indication of ...
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