Cheers....I am decorating my longue so adding a couple of double sockets to an existing ring circuit.....the sockets that are already here are about 12" from the floor......Ive looked on the internet and it mentions 450mm(18") from the floor for 'new builds'.....
The guidance for maintaining the strength of walls is for the depth of horizontal chases to be no more than ¹/6 of the thickness of the wall (for vertical it's ⅓, so unlikely to be a problem)
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