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Message: <blockquote data-quote="binky" data-source="post: 487144" data-attributes="member: 490"><p>the depth will no doubt sporn an argument, but in my opinion about 6" is plenty. ie deep enough to get a decent layer of cement over the conduit. For the electrical conduit I would probably use armoured copex dependent on the cable size - do insert a drawstring or insert cable before laying in the floor. The armouring being to ensure it doesn't crush under the weight of cement. The pipes will work best in there own insulated conduit, or plastic piping, and seeing as both will be in different conduits, spacing is irrelevant. Not sure I would really want to put plastic pipes direct into cement, they will fail eventually, hopefully in about 30 years time! </p></blockquote><p></p>