Rick wrote:

They can be 50mm below the surface, in which case I can put them where
I like. Each room (except one, see below) will have at least one studd
wall, 100mm thick. This means I will need to put them in the
insulation layers, do I have to do anything special for this ?

I take it that when you say 100mm thick, that is the thickness of the
studding? (i.e. with plasterboard and skim it is more like 125mm).

If it genuinely 100mm thick then you may have problems achieving the
required depth from *both* sides.

In the other walls I can run the cables vertically from a "device", or
horrizontally between 2 devices in the plasterwork, which some plastic
protection - is this correct ?

Yup, but you don't need the protection (although oval conduit is handy
for allowing wires to be replaced later). Remember also you can use the
150mm zone beside each corner, and down from the ceiling.


--
Cheers,

John.

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