Thanks for the advice. Do you think I could reduce the moisture issue if I used insulated ducting? As much as I agree drilling through the sandstone wall wouldn't be too bad it's more the location of the wall and the accessibility of it. Drilling from the inside is not an option as there is...
Hey everyone,
I'm in the process of planning out the renovation of my bathroom and have been trying to decide the best method of creating a flue for an extractor fan.
My first thought was to either core drill or stitch drill a 4 inch hole through the exterior wall next to the window however...