Purchased for a house project that was cancelled long after the return period. We have three standard internal doors (sold as one lot) which are 35mm thick and one 30 minute fire door (which will be listed separately) of the exact same design which is 44mm thick. Up and 'till about a week ago they had been stored flat, insulated from a dry concrete garage floor. They still have their protective plastic coating applied but may have some slight scuffing on the ends but no heavy impact damage, splits, damp or warping.