The flue ventilator stops rain entry to the chimney but still allows a small amount of air passage for ventilation.
Capping off a chimney flue.
Capping the flue is one of the best ways to close up the top of the chimney as it will still allow air to get in and out preventing condensation from building up.
However a standard chimney cowl can provide a good alternative to capping a chimney or if you think you may use the flue later to connect an appliance.
Get onto your roof with a ladder.
Buy a cap that has the same length.
Use a ladder that extends at least 3 feet 0 91 m above your roof so you can.
Find the flue on your chimney which is the clay or metal.
Capping unused chimneys flue ventilators uk.
You should cap any unused chimneys with a flue ventilator.
Put on heavy work gloves and use tin snips to cut a piece of sheet metal to the same measurements as the chimney opening.
Unused chimneys not only waste a lot of heat they also pose a potential damp problem as well as being a cause of smoking fireplaces and stoves.
Chimney cowls for capping chimney cowls are normally used to adequately ventilate chimney flues connected with an appliance like gas fires open flame gas fires wood burners coal fires etc.
Flue ventilators can be found on our chimney potpage.