There’s a hole in the subfloor. Was probably caused when we jacked up the joists earlier this year https://leadpaintdc.com/kitchen-floor-countertop/
The floor is only two years ago. In July 2018, Cam installed a new subfloor and vinyl.
So we hired Elmer to make the repair.
Elmer installed a jack post in the basement to hold up the support beam. This was needed because the floor was sagging a little.
I visited Home Depot and purchased the thickest vinyl sheet flooring they had. Slate for 99 cents a square foot.
After Elmer expanded the hole, he patched it up below in the basement with 2 x 4 and above at the subfloor with OSD. Then he installed the new linoleum and here’s the final product.