DIGGING A SECRET TUNNEL Part 7

A video on YouTube. In Maker & Builds, a Krater category.

Summary by Krater

Colin Furze continues his underground tunnel project, drilling test holes from inside the steel-lined tunnel up towards his house to locate the house foundations and a water pipe before breaking through.

From the video

Answers: How does Colin Furze find the house foundations from his underground tunnel?

tunneling underground
locating house foundations
drilling through concrete
ventilation pipes
water main avoidance

What it concludes

Measuring from outside and drilling test holes from inside the tunnel successfully locates the house foundations and inner wall position.
Drilling upwards helps avoid hitting the high-pressure water main and house foundations when breaking through from the tunnel.

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