boring a hole for soil stack.

[Joshua Graham]

Hello,

 

As the title suggests, I want to bore a hole for the soil stack of my home. I wanted to know if that would be a safe thing to in terms of water ingress as it is below the ground outside. If not what can I do to make it safe? Should I put expanding foam around the pipe to not allow water in or should the pipe be excavated around and drained at the bottom? Unfortunately its not an option to redo the pipe underground myself as it goes under neighbours house, joys of council houses! Please see the illustration I have attached.

 

Thanks

[nod]

It’s fine below dpc Brick up around Or diamond drill if you want 

[Joshua Graham]

Is it fine even below ground level? Should I tooth in some kind of lintel? And box around it under the ground to stop earth and water entering the subfloor?