hi just wondering if anyone has a link for lead abutment flashings new extension joining onto existing house wall. roof slated then flashing on top of slate ( not a windy area) been on LSA site but it doesn't give a brilliant clear diagram. building control say this method is just used for maintenance which i find crap, customer at it i think. all other specs followed exactly as LSA states and they've been followed that way by me for 18 years now!!!! I was wondering if they were going to say anything about aprons now too as they sit on top too!! thanks for any links or help in advance.