Cutting Subfloor

[Mike Burke]

Hello, I am working on my stairway/hardwood floor project.

I need to do something with the edge of the hardwood floor lip hanging over the first stair tread.
The sub floor under the hard wood is tongue n groove and has glue all over it.

I would like to cut off 3" of the front part of the sub floor and replace it with another piece of hardwood to create a nice looking end.
How would you ( if I can ) cut the underside of the sub floor ? What kind of saw would work for this ?
Is there a saw that would work for cutting the underside of the tongue n groove floor ?

I hope this makes sense....Here is a photo of the hardwood floor/ sub floor. The red marked area is what I'm talking about

https://photos.app.goo.gl/N7QzbaJbrvgzsWio8

20190508_195113 edit.jpg



Thanks