Plastering over open end of pipe

[Mr Blobby]

We have a 2-inch pipe and a 4-inch pipe being used as conduit to run cables from house to attached garage.

The cables emerge below the ceiling on the garage side, like this, the 2-inch pipe:

 

 

We'll be putting scratch-coat onto the walls of the garage and all the cables are chased into the walls as on the picture.

 

How do I finsh the open end of the pipe here?  Do I stops the conduit 20mm below the blockwork and then exit cables out the side of the hole and chase into the wall up to the ceiling void?

 

If so then how do I plaster over the hole?  Some mesh over the end of the hole and then plaster over? 

 

[Eric]

Don’t suppose you have the core that was drilled? Could glue it back in place.

 

You could fill the hole with stone & mortar.

[Mr Blobby]

11 minutes ago, Eric said:

Don’t suppose you have the core that was drilled? Could glue it back in place.

 

You could fill the hole with stone & mortar.

 

I don't want to close the hole complete, there are cables to run through it.  But if i chased the cables into the wall instead of coming all the way out, could I then cap the end of the hole somehow?

 

I can see I'm not explaining this very well 🤦

[Eric]

Not even sure I understand 😂

 

Could you put a plastic pipe in the cored hole, plaster up to & around, then fill the plastic pipe with expanding foam?