Can't replace sub floor due to pipes

PeterMa

hello everyone

i'm currently in the process of re-doing my bathroom - new toilet, sink and fllor (1/2 " ply wood on 3/4" subfllor with easymat and ceramics)

as i was doing this i noticed a few rotten pieces of sub floor wood under my old toilet- i want to make sure this are is sturdy but there are pipes in the way - some old that are not in use and some copper -

do i really have to relocate pipes to make my floor sturdy or can i use the old pipes for support -

this being said the are that was rotten is about 6 inch wide and about 12 " long in 2 areas

one are i can support with joists but the area with the wall i cannot see joists

your help would be appreciated

tpolk

pics would help

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The older I get the better I was

kwikfishron

"Can I use old pipes for support”

Don’t understand that part of the question.

If your talking about the pipes being drilled through the floor and how do you get the floor up then you sawzall a slot in the plywood. You say you can't tell were the joist are then cut out the rotted section you know your going to replace big enough to get you hand in there then feel were the joist are then stick your tape measure in there and it should be easy from there. Cut out all the plywood back the closest joist whether it's rotted or not and replace that section.

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