Matthew wrote:
Im replacing some bedroom skirting board and
wondered if I should raise it slightly
from the floor leaving say a 10mm gap so that
carpet can be tucked in (the original stuff was).
Is this normal practice

No, it's not.


or should I just position the skirting so that
its sits flush with the floor?

You could usefully leave a small gap, 1/16 would
be plenty.