Cob: Metal Roofing

[Darel Henman]

Steel does not create electomagetic fields.

But, steel is a dumb choice for a roof, just as corrugated metal is. 
Expensive and is a thermal bridge (very high thermal conductance).

Darel

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jen walker wrote:
> 
> Hi there, I read in 'The Hand Sculpted House' , that there are concerns that
> steel roofing may cause some kind of electromagnetic field in the building.
> It doesn't mention if this has actually been studied or is speculative. Does
> anyone know what the risks are, if any, of using steel roofing?
> Thanks,
> Jenny Walker