Yep you need a 3.5 x 4, underlay comes standard width and 99% of the time is 15m2 a bag, yes you need to buy enough underlay to go gripper to...
14 linear or 14 square metres? id assume its the latter, as 14m2 would kick out a 3.5x4, you can only by carpet by the 4/5m width and so you get...
Got told by another fitter/trainer that when he had his own firm that they as a rule when plying would if the floor was flat no cupped boards use...
You would of known if she took you to the small claim court, idle threAt on her part me thinks
Did you get that sorted in the end g4l? the karndean rep certainly made a awkward customer worse for ya, totally agree with the fulty crap form...
Just over 2 inches isnt it, 55mm? got that in my head from somewhere