The Gas Expert on Instagram: "I’ve seen so many flues in flats where the entire flue is shoved in without being cut back properly, often because engineers can’t reach such heights without scaffolding or because they work alone. Here’s a tip that might help someone. Certain flues by some manufactures are not UV resistant and need to be cut back something which cowboys won’t even read in the instructions and cause issues down the line. A few weeks ago, I had to install a flue on a roof where scaff