hi guys need some help with my project i have a garage that is part of the house and decided to convert into the kitchen ready to start but having a problem with the floor when you open the door from the hall into the garage you only have a max 65mm drop,i has told to meet building regs this no good as i need to insulate the floor any ways over it as to get the level i need i will need to break up the 200mm thick concrete and drop the floor level to give me what i need? any info would be a big help