Usually unused chimneys are capped off with a bent sheet metal covering and perhaps a wire strap or weight on the top.
Capping off an unused chimney.
Simply cut a tight fitting plug out of foam insulation and block the hole on the bottom.
Extend the tape measure to find the total combined length of all the flues.
These can simply be made out of a scrap or an offcut of lead beaten into the correct shape and bonded to the top of most chimney pots to effectively seal it and make it waterproof.
If bits of brick have crumbled inside or if there is significant decay consider calling a.
How to close an unused chimney.
Capping a chimney off with a slab.
One old and virtually free method of capping off or sealing a chimney that is generally no longer used is to make a lead cap.
Climb onto your roof to inspect the chimney.
The rain cannot get in but it is not sealed air tight which does allow any inside moisture to slowly get out.
Insulating the bottom of the chimney once you ve capped the top of the chimney you will need to insulate the bottom of it.
If you are only talking a few feet of redundant flue then you ll probably be ok with fully capping after reducing the height with a single vent left in the blocked up fireplace.
Capping a chimney off with a slab is well not may favorite at all.
You may need to use a screwdriver to loosen screws holding it in place.
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.
The bottom is even easier.
Why should unused chimneys be capped.
Other helpful maintenance.
Http www fixmyroof co uk videos and guides chimneys chimney capping in this video i show 3 different ways to cap off a disused chimney that does not alter.
Measure all sides of the.
If you decide to cap your chimney off yourself please make sure you use the correct ladder safety.
Remove the cap on the chimney.