Tearing up floors and slapping them back down

Ripping up the old subfloors and putting them back down seems like the most uninteresting part of this remodel, but it's also one of the most important.

The old subfloor was your pretty standard 1x8 on a 45 degree install from the days before plywood. It warps easily, and had to be chopped up to move the floors so what was left really needed to be pulled up and replaced with something more stable. We used 3/4" subfloor that is made by an Advantech competitor. Though we did use Adventech subfloor adhesive because it's pretty amazing stuff. Check it out.

Once all the subfloors had been replaced it was time to connect the old hardwood floors to the floor we had moved. I tried to weave it all back together but the intervening 70 odd years have added a lot of wood filler and grime that's caked up in the cracks of the floors. We had to sand down the edges of the boards to clean off all the "gunk" So we ran them through an oscillating sander on the groove side and then we flipped it over and cleaned up the tongue with the table saw set super low the blade just barely touches the tongue. It made a huge difference when I reinstalled the floors in the hallway. I still don't know if it was worth the energy to clean up the old boards, but we prefer to reuse when we can.

The final bit of work on the subfloors was to fit the shower area with a subfloor set between the floor joists instead of on top. I sistered in 2x4 boards and added cross members to keep everything super stiff since it would be much smaller pieces of subfloor I didn't want it moving around under the shower pan.

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