D2bee

Thanks, Much appreciated.

Thanks for these. Yes it is a 100mm screed and 100mm insulation. Just worried if is enough room for the fall given its just over 6m length to the outer skin

Sorry just trying to get used to the forum. Thank you both. Both ideas seem good and workable the line of the channel in the manhole is about 20-30cm below the slab and given the length, cutting through the foundation seem to be the only option to get the fall. The length is just over 6m.

Hi All, I have been reading some stuff on here and appreciate the generosity of you all in this community. This is my first self build/major extension project and will appreciate all the help available from all you Knowledgeable and experienced people are out there. I bought a property which the previous owner had commenced a double storey extension project with foundations in situ. However there is need for a ground floor toilet for which drainage provision was not made before the foundation was completed. My question is this: How can the drainage/soil pipe be inserted through the foundation to the manhole (located next to the foundation) without compromising the integrity/strength of the foundation? Any ideas will be most appreciated.

Hi All, I have been reading some stuff on here and appreciate the generosity of you all in this community. This is my first self build/major extension project and will appreciate all the help available from all you Knowledgeable and experienced people are out there. I bought a property which the previous owner had commenced a double storey extension project with foundations in situ. However there is need for a ground floor toilet for which drainage provision was not made before the foundation was completed. My question is this: How can the drainage/soil pipe be inserted through the foundation to the manhole (located next to the foundation) without compromising the integrity/strength of the foundation? Any ideas will be most appreciated.