I need to fit skirting board in one of my room. My problem is that the bottom 5 to 10cm of the wall is inconsistent; it's fine in places, then missing and back to bare brick in others, and remnants of some kind of hard foam elsewhere. No More Nails has been recommended but I'd need to get the walls level before I can use this and honestly not sure this is the best way to go anyway. I don't think replastering is necessary, hope not anyway...
If I get a taller type of skirting then I can attach the top of it to the existing wall (somehow - tips please! Nails?) but there'll be a variable gap between the bottom of the wall and the skirting. What's the best way to fill? Should I be fixing bits of baton to the bottoms of the wall where the plaster is missing and nailing the skirting to that and the wall, or should I use that foam stuff that expands?
What's lower than a DIY novice? That's me. Please assume for the purposes of your answer that I'm an idiot :)
Many thanks!