@cbinc is dead on. Ceramic insulators from knob & tube wiring.
Hey @jennifertemple, you might wanna use a moisture meter to track which areas around the leak have the highest MC. It should help keep you from spending copious amounts of time repairing plaster before you repair plumbing.
Which borescope do you have? Nowadays, you can get affordable ones to connect right to your phone via Bluetooth. I have 2 cheapies; 1 that I use for stuff like you're doing and 1 to look in all the nooks of an engine's naughty bits. I'll sometimes wind some insulated wire around mine before sending it through walls to keep it more rigid.
What is that in your last pic? Is that part of the stack?
Hey @jennifertemple, you might wanna use a moisture meter to track which areas around the leak have the highest MC. It should help keep you from spending copious amounts of time repairing plaster before you repair plumbing.
Which borescope do you have? Nowadays, you can get affordable ones to connect right to your phone via Bluetooth. I have 2 cheapies; 1 that I use for stuff like you're doing and 1 to look in all the nooks of an engine's naughty bits. I'll sometimes wind some insulated wire around mine before sending it through walls to keep it more rigid.
What is that in your last pic? Is that part of the stack?