Brand new, kinda feeling my way through this remodel. We have a huge 1800's Colonial and have decided to convert the 3rd floor (attic) into a master suite. Due to the location of the main stack, my plumber says I must raise the floor for the bathroom by 4-6 inches for pitch, which leads to the following questions(I know what I believe is right, but always appreciate expert knowledge):
1. Should I remove existing subfloor or cover with new framing?
2. Should new floor joists be laid parallel or perpendicular to existing?
3. does every joint require a support bracket?
4. What type of wood is common for this application?