can you advise i have just move into a my new house build .1946 i have a nice size loft ideal for a converion roof cut on site out of < 4 * 2 > @ 400 centres steep pitch what i would do on first fix is bolt new 4*2 <c24> to exstin rafters to make them 4*4 put .them add new 4*2 PFC BOLTed toget make a i beam to suport rafters. then fit in new 6*2 <c24> floor joists and put up dewalf walls both side then cut out 3*braceings to open space ready for 2 rd fix could this work