I'm about to lay a tongue+groove solid oak floor on top of the original flooring and wondered whether it was worth updating the treatment on the flooring.
Is this an easy DIY job. Can you just treat the top surface or do you have to start pulling up floorboards? Presumably rentakill have a special magic way of doing it without resorting to mass floorboard removal?
Has anybody else bothered to treat a subfloor like this before laying a new floor on top?