Very hypothetical questions for which there probably won't be definitive answers, but that's OK, I'm doing an "expectations management" thing here:
"The bungalow" has a brick (both leaves) cavity external wall and all single brick internals walls. The ground floor is poured concrete slab (not beam/block). The building is 1950's in East Sussex, privately built (not council stock). I don't have any reason to believe the house was built on a structural raft.
Which of these statements is likely to be true:
a) The external walls sit on their own foundations, mechanically separate from the floor slab;
b) The floor slab(s) pretty much sit on the dirt.
c) The internal non load bearing walls sit on the slab without foundations.
d) Internal centre load bearing wall has foundations and is separate from the slab.
e) There is a DPC or some sort of water barrier in/under the slab.
Answers or educated guesses would be most welcome.
I'm going to find out anyway, eventually, but I'd like to get some idea of what to expect so I can plan things like "is it OK to build new brick walls straight onto the slab" and "do I need to maintain an existing DPC" and "if I dig out a section of floor slab right upto a wall, does the house fall down" sort of things... :)