Hardwood (sub?) floor questions
Our house is 110 year old shotgun home with additions. Last year we pulled the awful carpet from the front 2 rooms & found beautiful hardwood beneath. We have since discovered that there is no subfloor underneath, so I assume that this floor was intended as a subfloor & someone stained it later?
The planks are 3.25"w & 1"d of various lengths, joists are 2"x10" 16"OC (16' span). It also extends into the kitchen but was later covered by plywood & vinyl in there.
We would like to use this wood for our floor. However, there are many a gap between the planks that are filled with decades of dirt plus wax (it looks like someone filled the gaps & the wax later dried out & cracked).
Should we leave it as it or pull it up, lay subfloor & clean the wood, then reinstall?
Also, where the kitchen meets the addition(s) in the rear, there is a 3" drop in floor height. What is the best way to bridge this gap?
Thanks for your time.