Capping Off A Chimney Flue

Measure the length and width of the flue on your chimney.

Capping off a chimney flue.

Use a ladder that extends at least 3 feet 0 91 m above your roof so you can. The flue ventilator stops rain entry to the chimney but still allows a small amount of air passage for ventilation. Buy a cap that has the same length. 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.

Put on heavy work gloves and use tin snips to cut a piece of sheet metal to the same measurements as the chimney opening. Flue ventilators can be found on our chimney potpage. Find the flue on your chimney which is the clay or metal. 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.

Insulating the bottom of the chimney once you ve capped the top of the chimney you will need to insulate the bottom of it. Get onto your roof with a ladder. 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.