This was a previously repaired area. The previous repair people used 3/4" particle board to replace the 5/8" particle board. They did not screw down the old subfloor surrounding the repair area, which made that bad soft spot. The lumps as you can see in this next photo was the joint between the old floor and the repair area. They also left a lot of the glue from the removed subfloor, which made the lump even bigger than the difference in particle board size
![Image](https://mobilehomerepair.com/phpbb/userpix/11_NoJoistSm3_1.jpg)
I then noticed a lot of sponginess in the repaired area too. For some reason, they used two pieces of particle board that was 48"x48". I don't know why they did not use one full sheet of 4x8 material. But the joint in their repair was also soft. So take a look at the next two pictures to see why. They added zero blocking under the repair.
![Image](https://mobilehomerepair.com/phpbb/userpix/11_NoJoistSm1_1.jpg)
![Image](https://mobilehomerepair.com/phpbb/userpix/11_NoJoistSm2_1.jpg)
As ugly floor repairs go, this has to be the worse I have seen. This is so comedic I wanted to share it with you.
JD