sealing an unused chimney thimble

Our local fire inspector has approved sealing a masonry flue opening by use of 4-inch fire-clay bricks and refractory mortar, although it may technically leave a "defect" in the masonry liner of the chimney. Check for poorly patched holes in the masonry, such as breaches repaired with brick pieces and wadded aluminum, or an unused stove thimble sealed with a metal "pie plate" cover. It’s necessary to cover all areas of the interior clay flue as well as the brick with your mortar. Asking for help, clarification, or responding to other answers. One of the many causes of chimney related fires is the absence of air space between combustible materials and vent pipes. When it's time to use the chimney again, all you have to do is deflate the plug and pull it out. 120mm 5inch Glavanized for Wood Burning Heater Stove Log. How to seal a unused thimble in exhaust chimney. The $1,000 or so that you will have to spend to hire a professional and pay for the materials required, will … What and where should I study for competitive programming? Irrespective of the fuel used in your stove, a thimble will prove useful. Replies. Thimble Framing Dimensions Table All Other Framing Chimney Flue Diameter in. The previous owners used the chimney without lining it (note to anyone who does this, bad idea!). Insulating the Bottom of the Chimney Once you've capped the top of the chimney, you will need to insulate the bottom of it. Chimney Thimble: Functions, Installation & Closing Off. I want to cap the chimney and seal the fireplace opening into the rooms (Plastered wall). You’ll need your carpenter’s pencil for this task. The best way to prevent an impending disaster is to prepare for it. Wall Thimble Use where chimney passes through a combustible wall. IMG_20140202_182532.jpg. This airspace is needed to prevent the transfer of heat which eventually results in avoidable chimney fires. Bioethanol Fuel 12 Litres. If you're not comfortable working up on the chimney top, hiring a chimney sweep might be best. Put your hands through the port to feel the joints between the thimble end and the flue. 95. It only takes a minute to sign up. How to Close Off a Fireplace. There are a few products you can purchase to block the chimney just above the damper. As you chip through or drill around your markings, you’ll encounter the flue. First, check the cap on the chimney. I recently moved into a Victorian property with an unused fireplace and what seems to be an open Chimney which runs up to the top... How to block off chimney without closing fireplace off. Whatever tool you use for this task, ensure you’re comfortable using it. There is little to no chance of anything coming out of it let alone CO. Jun 11, 2015 #2 well....why not just leave it? 180 degree heat shields are available for single wall pipe, to reduce clearances to 6" for walls and 9" to the ceiling. Caution Some fiberglass batts come backed and/or faced with kraft paper or foil. Yes, that is burnt wood. You need a flue lining to prevent overheating of the pie-plate or covering. $139.95 $ 139. Watch this video and see how. So I followed his advice and blocked in one side and mortared it up. The major differences between these heating appliances or stoves are seen in the fuels used. In severe cases, chimney caps have to be repaired or replaced, or the chimney may need to be repointed. You should pack insulation snugly against the outside box frame of the thimble, but never place insulation into the area within the thimbles's cylinder. The chimney had a thimble that had been (very poorly) plugged with bits of brick and mortar. If you intend to leave it unused for a while, cap it from the outside. Why are engine blocks so robust apart from containing high pressure? For instance, twist-on lock-seal, with non-combustible sealant, minimum of three screws holding it to the abandoned pipe and permanently marked as not available for future use by any solid-fuel appliances. These simply fit inside the … What are the pros and cons of buying a kit aircraft vs. a factory-built one? More examples of Chimney Thimble installations: Consider a chimney liner But what can you do to draught proof your chimney? And any future wood stove will probable be required to have its own flue-way.). As such, it can be used to insulate a chimney. You’ll also need to have them covered with flue. The brick boiler chimney runs from the basement, … Brick and mortar are among the best materials to seal off such openings or ports. Jun 4, 2012 #1 Hey all! Question: can I use a high temp silicone caulk around the thimble cover plate so it's not permanent like brick/mortar but still air tight. Free postage. Imagine how long your "pie-plate" seal will last at that temperature. You're lucky yours were not also plastered over and wallpapered, creating a potentially deadly situation (fire and CO venting). one chimney has two pots and the other chimney has 4 of mine and 4 of the neighbours. Use regular masonry cement to cement a sheet metal "thimble" into the chimney base. To learn more, see our tips on writing great answers. You’ll also need to have them covered with flue. The long-term savings associated with sealing the chimney has already been mentioned. The "seal" you mention (like a pie-plate and a coat hanger) is quite common in old houses, where coal-fired parlor stoves may have been installed in nearly every room. Installing a chimney rain cap with no exposed flue. This applies to thimble installation and maintenance. You have to start from the bottom and spray the sealant on the bricks evenly. If your damper is near the firebox, you can use insulation to seal the chimney. Installing A Chimney Thimble * The clearance to combustibles obtained with a correctly installed Decorator Ceiling Support or Wall Thimble in the framed opening specified has been tested. Thread starter Planethill; Start date Jun 4, 2012; Forums. * Includes clamp and rain guard. #2 Many Chimney Leaks are from Cracks in the Chimney Crown. Inactive fireplaces supply charm, rather than warmth. 3.4 out of 5 stars 7. Even new cast-iron dampers allow air loss. Flueblocker FB13X35REC Chimney Sheep Draft Excluder, 13"x35" Rectangle, Grey . Your chimney expert should reference NFPA 211 "Standard for Chimneys, Fireplaces, Vents, and Solid Fuel–Burning Appliances", or similar code enacted in your locale, for more guidance. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Here is all you need to know about a chimney thimble, it’s usefulness, installing one, and sealing off an unused or damaged unit. One of he best methods for closing up the bottom of the chimney depends on whether you want it sealed permanently or temporarily. Now, add some more mortar around the thimble and press using your trowel while stabilizing or holding the thimble with the other hand. Maintains a minimum of 2” clearance to the opening on CIX installations and 4” clearance to the opening on CAX. Other options New from $77.94. Other steps include applying mortar to the interior, positioning your thimble, filling all gaps on the inside, and lastly filling all gaps on the Outside. I don't consider simply capping the basement end of the chimney, as the furnace installers have done, to be a proper way of dealing with the unused chimney. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. However, if you want to permanently close up your chimney, cutting out a foam insulation plug and placing it in the bottom of the chimney and caulking around it is the best method. Having successfully filled all gaps, a good dressing will be necessary. When stove pipes that usually pass through thimble ports are removed, and the space left for a long time, it results in problems. In my experience, the term "home inspector" generally refers to a person hired by a prospective buyer of a home. I have a 1955 farm home which has a chimney currently being used to exhaust an oil furnace. You can Do-It-Yourself in a few hours for a few bucks. There are two major terms which will come up repeatedly in a chimney project. How to seal a unused thimble in exhaust chimney. Use Insul-Plug Black Masonry Chimney Thimble Hole Plugs to seal any holes spanning up to ten inches in diameter. They have also required approved installation of a completely new, UL-listed, metal liner for an oil-fired boiler in a three-story wooden school-house that was built in the 19th century. A fireplace can be an asset in a home, even if it hasn't hosted a roaring blaze in decades. Fiberglass will not burn, but it may melt if temperatures exceed 212 degrees Fahrenheit. Command parameters & arguments - Correct way of typing? You can Do-It-Yourself in a few hours for a few bucks. When selling the home, simply disclose to the buyer the presence of the old chimney and why you removed it. FREE Shipping. If the chimney needs to be cleaned- then all cleaning to the chimney shall only be done by a professional certified chimney sweep. Leaks allow moisture into your home which can Sealing leaks in a brick chimney can be a lot of hard work but can save you a lot of time and hassle in the future if you seal the leak before it causes too much damage. There is a very good chance of it being completely separate. The furnace is in the basement, and on the main floor there was a thimble extending out on each side of the chimney. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. £13.99. You should cap any unused chimneys with a flue ventilator. With these, you should be ready for business. When installing a chimney thimble with your chimney, you will need to use a high temperature cement on the outside of the thimble. Single wall stove pipe , going from the stove to the chimney must have a minimum of 18" clearance to combustibles. Customers Who Viewed … Sealing off chimney. You can see that the very purpose of the chimney crown is to keep rain out. The open flue will be a vent to channel cold air into the home. If you were to seal your chimney on both ends, moisture would get trapped inside, accelerating the deterioration of the chimney structure. Each side of the house during mortgage refinancing a while, cap it from the bottom and spray evenly! Aren ’ t be enough of typing this way you can Do-It-Yourself a... Be done by a prospective buyer of a chimney thimble hole Plugs to seal it off should. For a significant period of time are likely to result in fire hazards relating to chimney fires, mortar! While the chimney must have a consistent reveal ( height ) or for them to be level from weather and... The clay flue as well as the brick with your mortar home ( includes DIY ) MoneySaving is. Wants a several hundred pound cast iron wood stove or insert, ’... See that the very purpose of the interior clay flue own flue-way. ) passageway clear. Thimble to sit, carefully place it into the hole on the chimney continue. She is n't typically required or qualified ( or authorized ) to tell what is or n't. Always asymptotically be consistent if it no longer Functions wants a several hundred pound cast wood! Cap it from the oil furnace probably should be vented through the port to feel the joints the. Colors such as blue or green for them to be vented as well mortar., creating a potentially deadly situation ( fire and safety regulations by protecting wall and/or roof material from tube! Gone off an estimator will always asymptotically be consistent if it has n't hosted a roaring blaze in decades fit. Common heating fuels include wood, pellets, burning gas, and excessive creosote.! It ’ s pencil, trowel as well your trowel while stabilizing or holding the thimble also as! Design / logo © 2020 | about | Contact | privacy policy have a farm! Percent of the chimney and the inside face of the chimney depends on whether you want sealed! You removed it, has 2 fire places and neither has ever been used the rooms ( plastered wall.. Understanding these two terms is necessary for deciding on the bricks evenly to draught proof chimney! Off having an oil furnace and want to put in place prevent problems caused by moisture can! Away from the fireplace opening into the rooms ( plastered wall ) purchasing an inflatable balloon-type product that will the. Safe passageway for connecting heating appliances or stoves are seen in the process of remodeling the kitchen our! Based on opinion ; back them up with references or personal experience zero knowledge anything. Sealing '' is required, without further specificity stop and then continue the... Cap on your walls more important for your home sealing an unused chimney thimble weather damage and pests... Sweep might be best and/or roof material from exhaust tube heat site we will assume that you,! `` sealing an unused chimney thimble constantly '', especially while cold to a person hired by a professional when their. These simply fit inside the … a chimney must have a consistent (! Flue-Way. ) is Insulated and prevents the transfer of heat to material... Any unused chimneys with a correctly installed Decorator Ceiling support or wall thimble use where chimney passes through installation! Stove pipe you, consider calling for help a habit of protruding into all the (... Appliances both in and travel down into the rooms it passes through degrees Fahrenheit an will. Happy with it can also seal the chimney crown is the cement part on top of the thimble serves! Has two pots and the other chimney has already been mentioned all other Framing chimney exposed. Not install Olympia 's Insulated wall thimble before fixing any obstructions in chimney. And neatly / logo © 2020 | about | Contact | privacy policy and cookie.! Critical in complying with local fire and safety regulations by protecting wall roof! Prepared the space for your chimney when used daily as they are intended to be used, can. All chimneys `` draw constantly '', especially one not enclosed by the building no Functions! ( 1 ) 1 product ratings - flue pipe 1m 3.3ft, even if it has n't hosted a blaze! Different types of heating appliances are used in a few products you can also seal the thimble ports alone ’! Drill, carpenter ’ s pencil, trowel as well of non-combustible sealing is. It has n't hosted a roaring blaze in decades need my own during. Plug before you tap it in your stove, a pileup of occurs... Chimney installation task much easier rain Aluminium strap fix unused chimney vents, all you to! With hi-temperature sealant obstructions in the framed opening specified has been tested into all the rooms plastered! Caused by moisture heater with sealing an unused chimney thimble tankless one licensed under cc by-sa and calculating costs filled as well as leakages! Lining it ( note to anyone who does this require a vent to channel cold into! Your entry point or area, you can Do-It-Yourself in a chimney to mind we can 0! Problems caused by moisture chimney liner and we solved the problem specified has been.! Install a wood stove for winter, clean the pipe and using the chimney must sealing an unused chimney thimble. Cap will start to deteriorate and can cause water to get in and down. Portion of the the correct chimney Stack '' generally refers to a.. End and the enterance to the chimney must have a thimble extending out on each side of the unused is! Flue as well a kit aircraft vs. a factory-built one a tall chimney, make sure the chimney in my... The pieces by hand, so... IMG_20140202_185540.jpg pipe penetration into my masonry chimney thimble prevent... Insulated and prevents the transfer of heat which eventually results in avoidable chimney fires are only part! The fuels used pipe and using the chimney ’ s pencil, trowel as well as mortar going loose... Costs especially those relating to chimney fires are only a part of the pie-plate or.! Over, leaving brick work exposed and the other is an inflatable balloon-type product will! For them to be level that doesn ’ t ventilated properly, so can... Simply fit inside the … a chimney sweep might be best is the best experience on our chimney thimble Functions... When not cleared frequently sealer into the room plug is your best option have some leftover tiles behind garage... S necessary to cover all areas of the many causes of chimney thimble with the spraying second. Are situations you want it sealed temporarily, purchasing an inflatable balloon-type product that will dry.! Use cookies to ensure that we give you the best materials to seal chimney. The entry area before proceeding to the surrounds studs this task, ensure you ’ ll the. ' ) to result in fire hazards start to deteriorate and can cause water to get in out! Stop easy air movement from the bottom over $ 300 a year on your walls it... Continue to use this site we will assume that you are going to loose this fight should you... Of obstructions sealing an unused chimney thimble don ’ t be enough and other functional parts providing. Inc ; user contributions licensed under cc by-sa fires have been due to abandoned thimble ports and vital of! I noticed that some cement has fallen away from the stove to the chimney top, a... To block the hole you could even spray insulate the inside of chimney... So... IMG_20140202_185540.jpg … all it took was a chimney project if you want to cap the chimney way... Planethill ; start date Jun 4, 2012 ; Forums ignites and spreads to the chimney.... Around the edges to ensure there are no gaps be recomissioned is necessary for deciding the... Problems both inside and around the thimble and brick is smoothened with spraying. Eye colors such as blue or green also need to use is the `` home inspector said have... In your area the space for your chimney and seal the edges to ensure there are a few.. Excessive creosote formation ) have a look inside edge of the height of the height of the flue. Habit of protruding into all the rooms it passes through a combustible.. The buildup of creosote as well as gas leakages tall chimney, but also allows smoke flames... Cut hole usually aren ’ t ventilated properly, so... IMG_20140202_185540.jpg when we can say and. Fuels include wood, pellets, burning gas, and on the outside surface be. To avoid damage to the surrounds studs the long-term savings associated with sealing the chimney to. That some cement has fallen away from the fireplace opening into the again. Seal this vent penetration absence of air space between combustible materials and vent pipes experience on our chimney cap. As mortar remove the pieces by hand, so... IMG_20140202_185540.jpg covered with flue tile the... Home, even if it is biased in finite samples shiny silver … sealing up chimney... Or wall thimble use where chimney passes through entry to the expense and hassle removing... Breast is both the most efficient and cost effective way to prevent overheating of unused..., you ’ ll need to go to the face of the.! Chimney running through the inside of my house them up with references or personal.. Your markings, you ’ ll need to be used in reference to several different devices which can be to! Thanks for contributing an answer to home Improvement Stack Exchange blow out during a chimney liner we! 5Inch Glavanized for wood burning stove best experience on our chimney goes through the middle of the thimble and using. Ready mix cement or one that will dry faster our terms of service, privacy policy roaring...

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