Hi All,thinking about trying my hand at a loft conversion in the future and have read up a bit on diynot .forgive my innocence firstly! It seems ( I dont know all the lingo) I should screw 8x3s to my existing beams if i can get them to sit on the outside wall alongside the original beams and they will also rest on a central load bearing wall.? is this roughly the extent of strenghthening the floor or should I think of another way? should I get someone from Building regs in to tell me what I need ,for a fee? also I know I will have to insulate the roof itself,now a couple of points here please: my old felt is a bit rotted in places and sagging with bits of debris and prob old birds nests but it doesnt appear to have any leaks. could I just insulate anyway and plasterboard and not worry that mabye it may leak in the future,or pay a fortune to have the whole roof off to refelt it,do you think it would be ok? Also could I use the fibre insulation I have on my loft ceiling and reuse it to fill the spaces on the rafters as insulation (under the tiles ) ? Im trying to find out what is the first thing I should do basically with a few other bits thrown in for good measure! I dont need a dormer or any structural work (as far as I know!) I dont htink I could do the stairway or window but you never know !so wondering is it possible to do this job as a total amature ( but with a bit of self belief?! Thanks for reading this far anyway,cheers!