This project was about leveling a floor in an 1880s Farmhouse that had sagged and sunk on one side till it was about 3 inches lower. After reinforcing the floor joists in the basement, I set about installing 2x4 ribs to fit the sag of the floor. Each rib was scrolled and hand-cut making sure the top was level from the highest end of the room. Then 1x12 heart-of-pine tongue and groove barnboards were installed with authentic cut nails. The finished floor was stained to look weathered and sealed with 2 top coats of polyurethane.
These 2x4s ribs are 12 inches on center cut to fit the curve of the floor are level on top 
New 1×12 inch heart-of-pine tongue and groove barnboards 
Showing the barn boards being installed over the ribs 
You can see the 3 inch sag from one side of the room to the other 
Used 2 inch cut nails used to hold down the flooring 
Finished with a custom stain to make the floor looked weathered 
Sealed with 2 top coats of polyurathane
