Bathroom floor replacement

[DESERTDOG]

I need to tear out my bathroom floor and replace it.
Where do I start?

[Mr T]

What is your current floor made of?
What do you want to replace it with?

Why are you tearing it out? Age, water damage, remodeling, ect?

The big issue is changing the height of the floor. This can effect the way your toilet mounts back down (as your drain/mounting flange wont be moving) Same with your door/door frame. You want to try to keep the height of your floor the same.

[DESERTDOG]

The floor looks like someone put particle board over the original floor.
Im not sure what to replace it with other than plywood and linolium.
It was water damaged. It looks like the water ran out of the bathroom and into the next room about 5 feet or so.
Looks like 3/4 " particle board.
If I pull the toilet, and the sink vanity and pull up the particle board and replace it with the same 3/4" I should be ok, right?

[pushkins]

If you pull the vanity and the toilet your job will be a whole lot easier.
5/8" sub floor (tongue and groove if it needs to be joined). Repair any rotted floor joists by sistering a new joist to the old one overlapping any rotted section by at least 24". Construction glue the new sub floor before screwing it down (it will help with any squeaks). Make sure before you start with a new vinyl flooring that you apply a "Primer" to the sub floor board.

[DESERTDOG]

Thanks,
That helps me a lot.
One more question.
How do you replace rotten flooring under a wall ?
Like the wall between the bathroom and the bedroom.

[pushkins]

Pre cut a piece of sub flooring material (ply etc...) remove the rotten sub floor in small pieces say 16" in length and replace as you remove this way you are not allowing the wall to sag down while you get all of the rotten wood out. For example if the rotten wood is a length of say 48" and you pull out all 48" there is a great chance that this section of wall will sag downward. By removing a small section at a time and sliding in a new piece of sub floor over the floor joists you will alleviate any sagging.
Technically speaking you need only support the wall's bottom plate right over the floor joist, so you could make a shim and over the floor joist push in the wedge shaped shim (gentle tap with a hammer) to take up the slack. Though I would myself try to span a piece of sub floor from joist to joist.

If there is already a sag then perhaps supporting the ceiling joists and lifting slightly might be an option to look at.

[DESERTDOG]

Thanks A million.
Now I can get started and do it right.
Thanks again.