Capping Off An Unused Chimney

Capping a chimney off with a slab.

Capping off an unused chimney.

Simply cut a tight fitting plug out of foam insulation and block the hole on the bottom. You may need to use a screwdriver to loosen screws holding it in place. Extend the tape measure to find the total combined length of all the flues. 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.

The bottom is even easier. Then measure across your flues to find the widest point. Remove the cap on the chimney. Usually unused chimneys are capped off with a bent sheet metal covering and perhaps a wire strap or weight on the top.

Place the end of your tape measure against the side of the flue which is the clay or metal tube coming out from the top of your chimney. 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. 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.

Measure all sides of the. Climb onto your roof to inspect the chimney. Other helpful maintenance. 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.

Insulating the bottom of the chimney once you ve capped the top of the chimney you will need to insulate the bottom of it. Why should unused chimneys be capped. How to close an unused chimney. 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.

The rain cannot get in but it is not sealed air tight which does allow any inside moisture to slowly get out.