While making repairs to the sill, I noticed that the subfloor itself is in pretty bad shape. What is the best way to replace subfloor? My current subfloor is made of planks. If the damage goes several feet into the room, what is the best way to replace the subfloor? Should I stay with planks or go with plywood? What about a temporary wall? I have one now but if I remove the subfloor I will need to build a taller temp wall which is no problem but then if the wall is sitting on the floor joists, how do I insert the new subfloor? Should I build several small temp walls? Any suggestions will be great.