Can I fix this without taking the wall down?

[Joe Fixit]

Due to first floor bathroom leak, some of the chipboards have water damage. I've used a screwdriver and scraper to 'scrape' off any loose or spongey chipboard and have left with this. There's still a bit damp smell in the air so not sure if there's more but what's left seems reasonably hard and can't really scrape off unless I use a lot of force.

Question, as it runs under a partition stud wall and beyond a joist, I can't really put a noggin to support the other side(of the joist) of the chipboard. Could I say use wood treatment around here and wood filler and then install new flooring to this joist?

Or do I need to take the whole wall down and remove more chipboard?

 

[big-all]

is this the actual bathroom ??
do you have a few weeks spare before moving on ??
how long has it been drying out??
if you stand on the wall floor plate does it move ??
what does the floor look like the other side ??
my thoughts a wedge/bit off timber recessed in the gap between joist and wall floor plate every 5-600mm and through fixing to stabilize so shrinkage will only be between other side floor and skirting 'although blown flooring will never recover it may just relax slightly to very swolen and blown from very very swolen and blown
Batons this side to terminate flooring on

further ideas and comments welcome

 

[Joe Fixit]

is this the actual bathroom ??
do you have a few weeks spare before moving on ??
how long has it been drying out??
if you stand on the wall floor plate does it move ??
what does the floor look like the other side ??
my thoughts a wedge/bit off timber recessed in the gap between joist and wall floor plate every 5-600mm and through fixing to stabilize so shrinkage will only be between other side floor and skirting 'although blown flooring will never recover it may just relax slightly to very swolen and blown from very very swolen and blown
Batons this side to terminate flooring on

further ideas and comments welcome

Yes this is the bathroom. Some of the chipboard panel ends on this floor joist. Hence why Im worried if I cut out anymore, the rest of the panel on the other side would not be supported.

Been working on taking the floor out for few days now but only just cut this section out this morning. So airing out for half day and now used a dehumidifier setting on a portable air conditioning unit (which blasts out warm air)

I thought about getting multi tool and taking small sections of chipboard between wall plate and joist as well. But again, worried I won't be able to put noggins to support the panel on the other side of the joist. I would need to cut out some of the wall plate to fit timber on the other side. Is that an option? Cut small sections the bottom frame between the vertical studs?

P.s. nothing moves when I stand on the wall plate

 

[big-all]

i am trying to work out whether the floor supports the wall [parallel joists but not exactly under ]or are the joists at right angle??

 

[Joe Fixit]

i am trying to work out whether the floor supports the wall [parallel joists but not exactly under ]or are the joists at right angle??

Yes the floor joists run parallel to the stud wall (bedroom on the otherwise and has hard wooden plank flooring)

Hope the image below makes sense

Edit:

Added a sketch of the room. Im wondering whether the area on red will need to be removed as that's the area which had the biggest leak (there were two leaks)

 

[big-all]

is there anything heavy like a bath going along that wall ??
what is the span off the stud wall[full side to side ]??

and is that the same as the span on the joist this side off the wall??

 

[Joe Fixit]

is there anything heavy like a bath going along that wall ??

Yes, a bath will be on this side of the room (as it had been) but will be on the new flooring sharing load on the joist on the photo

I was intending to lay new ply as sketched out below with noggins to support new boards

 

[big-all]

as the span looks around 7ft/2m i would revert to my first suggestion making sure as much it tied together with no to minimum floor edges unsupported

 

[Joe Fixit]

as the span looks around 7ft/2m i would revert to my first suggestion making sure as much it tied together with no to minimum floor edges unsupported

Yes, the Span of the whole frame is about 2m.

So just to clarify, you think I could get my multitool or scraper/hook to carve out some chipboard (highlighted red) and leave everything else Insitu?

The chipboards are 600mm wide and the area I'm chipping out is probably about 100mm-150mm on each corner.

 

[big-all]

you say on top ??
in my head its knock out say 4-6"wide and tooth in between stud floor plate and the timber underneath
iff you can fit a baton to sit the board edge on then just go for that
the idea off between timber under the floor plate is to hold tight together and avoid movement through shrinkage between floor and wall

if no one else chips in tonight then take my thoughts as being as reasonable a compromise solution giving best support for the lowest destruction

 

[Joe Fixit]

Thanks for your help. So you think cutting out the chipboard 4"-6" will be fine?

Sadly, can't really fit a baton or any noggins through that small gal to support the board edge on the other side.

I did wonder if it's possible to cut out a small section of the bottom of the wall plate between the vertical studs? That way I can cut out more of the chipboard and then could potentially fit a baton supporting more chipboard either side of it?

Do I think it's safe to cut out the red? Could add a noggin just above to help stabilise the wall frame?

 

[big-all]

just go half stud thickness the bedroom should be uneffected or a different challenge that can be done at a different date or in conjunction with careful planning

 

[Joe Fixit]

just go half stud thickness the bedroom should be uneffected or a different challenge that can be done at a different date or in conjunction with careful planning

Thanks for your help but don't quite understand that last one. What do you mean by going half stud?

 

[big-all]

bathroom side off the wall centre so assuming 100mm studs to 50mm depth giving floors both sides 50mm support

 

[Joe Fixit]

bathroom side off the wall centre so assuming 100mm studs to 50mm depth giving floors both sides 50mm support

Do you mean something like this?