OSB shuttering around Cast ST2 concrete foundation slab

[ab12]

Quick question- what is the recommended practice for the OSB shuttering around the concrete foundation slab- should it be left in place or taken out.

 

Brickie/builder wants to put put soil above and compact the floor in the perimeter around external leaf of engineering bricks.

 

My worry is over time OSB will decay and may cause little bit of the ground above and surrounding it to shrink. 

 

Therefore is it best of its taken out or am I over thinking this?

 

Pictures below, red arrow pointing to OSB  shuttering boards, from Memory I think depth was 60cm so approx 50 cm or probably a bit less remains below ground.

 

Thanks

[Russell griffiths]

If it comes out with a few wacks of a large crowbar then take it out, if after 10 minutes of sweating you can’t move it then leave it there. 

[saveasteading]

It should be removed as best practice. Whether it matters is another matter.

The top will go soft and rot very quickly. You can rake it out.The deeper parts will go soft quickly  and become compost over a few years.

[nod]

Let It rot 

Find something else to do