Thanks Guys
I give building control a ring before I make any further repairs
Doors actually installed by manufacturer (There own surveyor stated they had to be fitted to the external walls)
We've just had new French and Bi-fold doors fitted. The original sliding doors were fitted to the internal block wall. The new ones are fitted to the outer stone wall which is 14cm further out than the originals.
What is the best way to insulate/make good these gaps given that it will...