Sealing An Unused Chimney Thimble

You can do it yourself in a few hours for a few bucks.

Sealing an unused chimney thimble. It must be a complete rain shelter not just the spark cap that is normally on a chimney but at the same time it must not be sealed air tight. Firstly remove all of the duct tape and put them in a disposable garbage bag. Sealing the chimney bricks remember to allow the crown sealer to dry out completely before beginning the second stage which should not take more than two hours. Watch this video and see how.

Leaving the duct tapes lying on the roof especially if it is windy will increase your cleanup job later. Press the metal into the. There is one important detail for the top cap. It s important that your chimney service technician checks that the area that gets closed off has a lining.

Consider a chimney liner. Usually unused chimneys are capped off with a bent sheet metal covering and perhaps a wire strap or weight on the top. Air sealing a chimney can save you over 300 a year on your energy bills. Apply a bead of butyl rubber caulk around three sides of the chimney at the top and set the cut piece of metal on the chimney so the edges line up with the caulk bead.