EPDM can be bonded to the outside of a twin-skinned flue pipe penetration, i.e. an insulated flue. This is because the outer skin remains relatively cool compared to the inner flue pipe. Most modern flue pipes are twin-skinned.
EPDM can be bonded to the outside of a twin-skinned flue pipe penetration, i.e. an insulated flue. This is because the outer skin remains relatively cool compared to the inner flue pipe. Most modern flue pipes are twin-skinned.