A friend has just had an old gas boiler removed from his kitchen. There is now a chimney with a cowl that is no longer used. The lower end has the remains of an asbestos flue which will need trimming back to the ceiling level - or removing.
What is the advice about the flue -
- Leave it and just cover the lower end?
- Remove cowl and cap the flue - fit a vent in the side of chimney?
- Any other suggestions?