Need to repair this. A lot of it is rotting. Basically all the lower front, front window frames and shed roof. Especially the shed roof. Did this after measuring up the existing bits that are problems. Measurements for the rotting bits are a load of 30*35 38*38 19*38 60*60 175*40 for the window sill. About 2230*1600 for shed roof No idea about wood. (metal I'm fine with. Grind weld paint done.) No idea what kinda wood or what treatments. Help.