Please can someone advise me: Does a ring main cable need to be derated if it is buried in 20mm of cement-based grout?
The problem: I have a problem with a floor that is floorboard on battens (w ith shims) on original concrete floor. Some battens are not properly resti ng on the concrete underneath and the floor moves (about 5mm) and squeaks w hen walked on. I really don't want to rip up all the floorboards (1000+ n ails, all hammered in by my wife) to redo the battening.
What I plan to do: As a simple fix I am thinking of pouring in about 20mm of cement-based grout which will flow under the supports of the battens and fill the little 5mm gaps. i calculate that it won't block the airflow too much but it will bury the existing ringmain cable which is simply lying on the concrete underneath.
Do I need to worry about derating. the cable will end up with concrete un der it and 20mm of cement grout above it, then a 50mm air circulation gap.
many thanks for comments.
Robert