JamesP Posted January 12, 2019 Share Posted January 12, 2019 Can anyone advise, Have a single storey vaulted ceiling kitchen, dining room which has OSB on the inside (Warm roof). Our plan is to finish with sheets of 8x4 plywood. Do I have to fit plasterboard first? The BC mentioned the kitchen ceiling requires National Class 1 for surface spread of flame rating. BC also mentioned using fire retardant varnish. Does the plywood need fire rating as well? Link to comment Share on other sites More sharing options...
JamesP Posted January 12, 2019 Author Share Posted January 12, 2019 (edited) Just found this, I even made a a post..... Edited January 12, 2019 by JamesP Link to comment Share on other sites More sharing options...
ProDave Posted January 12, 2019 Share Posted January 12, 2019 The plywood will need a fire retardent coating. That is probably what he means. Link to comment Share on other sites More sharing options...
Russell griffiths Posted January 12, 2019 Share Posted January 12, 2019 We are also having a wooden ceiling bc told me as no rooms above, the coating needs to be to stop spread off flame not necessarily fire proof. Link to comment Share on other sites More sharing options...
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