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Totally possible, given how this house has seemingly been abused in every conceivable way, the masonry on exterior seemed fairly untouched, by which I mean it was as fucked as the rest when we had it repaired, but I guess the lintel could have been replaced from the inside.
Speaking of lintels. How much height could I gain in a doorway by replacing what's probably a concrete lintel with a catnic one? I have a window at the back, cavity wall, that would make an excellent patio door on to my garden, but it's only about 1.8m high.
Not a lot, other than the plaster. It's a bit odd, feels like a metal lintel, although that wouldn't sit with the age of the house I don't think. Anyway there's at least an inch of build-up so I've just gone with plugs for now. They're the Fischer duo ones so in theory should work in either scenario