RayB

Fab, thank for all the advice. I’ll post some photos once I start the excavations, which won’t be for a while, but now having a direction of travel helps. I fear there are only two courses of bricks between the foundations and the dpc, so the only options are out and down or down and out.

Apologies for asking for help with what must be a common issue but for which I don’t seem to be able to find an answer anywhere. I am wanting to add a toilet (DIY) to a ground floor room that has no sewer provision. The property is a bungalow with strip foundations and uninsulated concrete floors. Property build late 1970s. The property is on a septic tank. I am planning to run a new drain to the existing manhole which has an invert level of apx 1200m, which has an unused connection in the right orientation. What I can’t workout is how to get the sewer outside? Is is standard practice to tunnel under the existing foundations ie drop vertically inside the property to get appropriate depth? The toilet will be on the external wall nearest to the manhole. I was planning to dig out the floor of the room to add insulation so happy to do this. My main concern is undermining my existing foundations as a deep hole would be required either side of the wall, and keeping the BCO happy with the plan. Any advice would be greatly appreciated. Many thanks in advance, Ray