Clean the flange well or use a new one and install over the drain and new wood.
Floor under a toilet.
Repair floor under toilet nail the plywood to the floor joists.
Because laminate flooring floats above the sub floor on top of underlayment it will expand and contract slightly with the temperature and humidity of the room.
Then i leave a gap of 1 4 or so to the rest of the flooring that will be.
Water is so prevalent in bathrooms that it is an expectation not an anomaly.
You may need to scrape the flange with a small putty knife and use a wire brush to get it clean and free of any corrosion or debris.
Access a crawl space or basement and locate the plumbing drain below the toilet.
On the walls ceiling and the floor.
So what i am thinking is i basically cut a round or square i guess now that i think about it piece to go under the flange.
It goes under the flange and transfers the load of the flange and toilet and you out onto more solid surrounding wood.
If there is any leaking that occurs in a toilet it would happen through the floor and not on the floor.
Then the toilet is reset so the base covers the cuts around the drain.
Peel the flooring several inches beyond the rotted area.
Put on safety glasses and work gloves.
If you re installing a new floor pedestal sink and toilet you should install the laminate flooring first so it s under the sink and toilet.
Toilet drains are 3 or 4 inch in diameter and have a p trap below the toilet.
Enough to create two square frames to fit between the floor joists and under the cuts.
Since you re raising the level of the floor you ll likely need to raise the level of the flange that skirts the drain as well.
Make sure to make your nails flush with the wood.
A spongy floor around the toilet is a strong indication that the subfloor has absorbed water.
The toilet has to be removed and the flooring cut to go around the floor drain.
Discover swollen discolored wood a sure sign that the subfloor needs replacing.
If only the area directly below the flange is rotted you can install a two piece steel closet flange support.
A toilet would actually never leak right onto the floor.
Am installing some allure vinyl floating floor in bathroom i am also installing a new toilet flange and toilet since i replaced the subfloor there.