Concrete is a good conductor of heat, so extra depth does not necessarily create a heat output issue, but the increased mass will slow the reaction times. This can be an advantage under certain circumstances.
The underfloor heating pipe can be tied to the reinforcing mesh. In the case of a thin ground bearing slab, the fixing mesh should be sat on 'chairs' to lift the pipe deeper into the concrete. In most cases, it is beneficial to position the pipe towards the top of the slab, although in practice this can be difficult.
Evenheat can advise on the thermal requirements for the heating system. However, it is the responsibility of others to ensure that all building regulations are met.
Evenheat Limited, Compton Park, Wildmere Road, Banbury, Oxfordshire OX16 3JU
Telephone: 01295 277881, fax: 01295 277556, email: