My builder has told me my internal walls need planing as they?re not as flat as they should be - had anyone else had this done? Basically it involves hacking off all the plaster, replastering, and redecorating - and his company can do that all for me, so I don?t need to bother looking for other people. And it should last for at least 5-7 years before it needs redoing (they offer a free 5-year rechecking service too!)