Sawing the floor, risks - OK or not?

[Mjolnir]

Hello,

See the image, the chipboard flooring runs from the room on the left side of the wall to the hall on the right side (blue arrows). Under the chipboard is foam insulation and a concrete slab. I want to access the concrete slab and replace the chipboard flooring.

I was thinking of sawing the floor along the interior walls (red lines). Is it okay to have the seams along the walls or does it pose any risk?

 

[tergo]

are you sure that the chipboards go under the wall? normally you don't put walls on floating floors
or are there floor joists under the chipboards?

 

[Mjolnir]

are you sure the chipboards go under the wall? it's not common to place walls on floating floors
or are there floor joists under the chipboards?

The load-bearing wall studs go under the floor chipboard, as you say, see image 1 below. But non-load-bearing interior walls are placed on top of the floor chipboard that integrates with the floor in other rooms, see the other two images below.

 

[tergo]

I myself have floating floors that lie on styrofoam; none of the walls rest on the chipboard, rather I have wooden sills under the walls that correspond to chipboard+styrofoam in height.
It is probably not a problem to cut the chipboard next to the wall, possibly leaving the wall standing on a narrow strip of chipboard and not fastened laterally to the floor.

 

[Mjolnir]

I myself have a floating floor that rests on foam, no walls are standing on the chipboard, but I have a wooden sill under the walls that corresponds to the chipboard+foam in height.
It's probably not a problem to cut the chipboard next to the wall, possibly the wall might end up standing on a narrow strip of chipboard and not secured laterally to the floor.

It also seems like the foam merges, so it would have to be cut as well in that case. What could be the risk of placing a seam along the red lines? Can the seam be reinforced by gluing? Is it better to place the seam a decimeter or two away from the interior wall?

 

[tergo]

Better if you place the seam a decimeter or two from the interior wall?

If you place the seam about 10 cm from the wall, you can put a metal strip of about 10-12 cm under the seam and glue and screw the chipboard in place. 30mm chipboard screws should work for that.

 

[Mjolnir]

if you place the joint about 10 cm from the wall, you can place a 10-12 cm metal strip under the joint and glue and screw the particleboard down. A 30mm particleboard screw should work for that.

Thanks for the tip, if something were to happen with a joint along the interior walls, what do you think it would be?