I’ve requested copies of their conservatory designs and foundation details, no response…offered to dig a trial hole, no response….
Their conservatory sits on an approx 500mm double wall.
Our Building regs notes (submitted to the building inspector), of which they have a copy state “Foundations to be similar size as existing house footings and taken to a similar depth as existing”.
I appreciate going we may have to go lower than their foundations hence the offer of underpinning