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Cube lofts do metal framed loft extensions - may be worth contacting them
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Many loft extensions are built that way.
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I think the point about lofts was to give a pointer on ease and cost.
Relative to blockwork, is it cheaper, easier, faster, lighter (and so less demanding of foundations)?
No experience, but thinking it through I'd be surprised if it would be less demanding of foundations. Or more to the point that I'd be surprised if you were allowed to have weaker foundations.
Judging by builds near us once groundworks are complete block work is super fast. So again I'd be surprised if there's much in it for a 2nd storey.
Less brick and concrete means the carbon footprint should be lower.
NotThamesWater
jellybaby
hugo7
@ffm
Has anyone here had an extension built that is basically a timber box on top of an existing single-storey brick/block section of their house? I'm interested in it as an alternative to a full matched-block extension on top of a garage (access will be through knocking a door through the 1st-floor gable-end wall of the house). Relative to blockwork, is it cheaper, easier, faster, lighter (and so less demanding of foundations)?