Browse Forums Landscape & Garden Design Unless the room is for storage then it's non compliant BCA V2 2019 S3 P3.8 You have 2 options 1. The builder deconstructs the section and rebuilds as per plan /… 7 10684 2 31344 there is only 20% difference in concrete strength between 20 mpa and 25 mpa, so check with your engineer first if it fits his calculation tolerances. There are ways to… 6 18298 |