I'm thinking of laying thick laminate flooring in my bedroom in a couple of weeks onto floor boards from fllors to go. Just planning it out. What is the best underlay to use please, and i don't really want to see the cuts around my door frame. Can these be sawed at the bottoms so the flooring goes under nicely? My one door frame goes onto the en suite and there is also lino in there, so how do i cut that door frame without straight through to the en suite.