Want to upgrade your fireplace? You’ve come to the right place. The flue is then sealed with a band that should be included in your kit. Hello, First off; thanks for any help in this question. Cracked flue tile repair costs $80 to $120 per square foot or between $250 and $1,000 to fix on average. Both are efficient at sealing off the flue, even more so than traditional dampers, and are relatively inexpensive. March 2008. Fireplaces, stoves, Flue pipes and access doors are all varying shapes, sizes and materials and as such we must have access to a variety of methods and techniques to seal them all for the purpose of a clean and safe sweeping process. Clay tiles are replaced, or mortar is used to seal cracks and holes. All rights reserved. The chimney gets really hot so I wanted a heat resistant mortar in there. Click to enlarge illustration. Your second choice is the best one. Re: How to seal around chimney flue Richard, I was worried about the same thing and I am using several techniques! to this site, and use it for non-commercial use subject to our terms of use. Troubleshooting Fireplace Damper Problem... Troubleshooting Fireplace Damper Problems. Another quick fix would be installing or replacing your chimney cap; back-puffing problems during windy conditions point directly to this. Unused open flues continually draw expensive heated air from the home causing drafts both up and down. Copyright© Why it is necessary to sweep the wood burner chimney flue properly Removing as much of the waste material generated from burning wood: smoke particles, soot and creosote, is very important. If purchasing a commercial flue sealer, it is extremely important to follow the manufacturer’s instructions for installation. Product cures with heat from the appliance. Sealing the cracks will prevent any more moisture from leaking between the walls and flue inside the chimney. Repairing cracked flue tiles is a temporary solution, and the chimney flue eventually needs relining or replacing. All chimney flues must be ventilated top and bottom. Maximum temperature range for use: 1050° F/566°C. Even with the damper closed, the fireplace flue seems to dump cold air into the house all winter, so I’d like to seal it up. A closure plate is used when a chimney liner, containing flue gases, is present. Top sealing damper. problems contact webmaster@doityourself.com. If there are a few small cracks in the chimney crown but it is otherwise intact then sealing the crown is a viable repair option. Caulk this wood blocking to the framing. If you have a B Vent gas flue, commonly just called a chimney vent, or a masonry flue that starts in the basement (the idea being that it’s likely to be used to vent a central heat appliance) I would advise you NOT block off a vent from above. Sheetmetal flue pipes, on the other hand, carry combustion gases from the furnace or the boiler to the chimney. Sealing up a chimney I've recently bought a typical terraced property in Patchway; there is a fire place in the living room. Flue sealers can be found at chimney supply and masonry stores, and can be purchased from many online retailers. Sealing and insulating the clay flue at the top and bottom of the stack will ensure the job will yield these desired results. Get it as soon as Thu, Dec 10. Product cures with heat from the appliance. 0. Available with or without holes for flue pipe, and also with or without access plates. 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. Proper maintenance begins with good old fashioned hygiene. I have a brick chimney that is a wood fireplace. Stove register plates are used, with or without a flexible flue liner, to seal off the chimney opening on your installation to prevent chimney debris falling into the room.. Sealing leaks in the chimney is another possible remedy, depending on what is found during your inspection. This action is different than sealing the flue itself, which runs the length of the chimney. Smoke from first floor fireplace in basement. At Vertical Chimney Care, we regularly inspect chimneys from outside and inside. Through these gaps, if left unsealed, combustion gases may leak into your home and build up to unhealthy levels. What can you say about ethanol and gas fireplaces? Click to enlarge illustration. 3M High Temperature Flue Tape, High Heat Sealing Tape up to 600 degrees, 15-Foot Roll. gap allows the clay flues to expand and contract from repeated heating and cooling without cracking (or cracking the crown). For gas / wood fireplaces, pellet and corn stoves. Learn more our maintenance process here. Drop a weighted rope down the water-heater flue to an assistant in the basement. The solution to inefficient throat dampers or no damper at all is to install a top sealing damper.As the name implies, these dampers install outdoors on top of the chimney flue. You may find them to be easier to put in and take out. If you notice any decline in the performance of the flue or chimney, call a technician right away. The Seal Tight Damper - Designed by Sweeps, Designed for Sweeps U.S. Fireplace Products and Lindemann Chimney Supply are proud to offer our line of top sealing dampers! The flue is created out of metal sheets. Fasten wood cross pieces to joists keeping at least 3 inches of clearance to the pipe. As the name implies, these dampers install outdoors on top of the chimney flue. Look closely at these connections and you will likely see gaps. With carbon monoxide perhaps the biggest safety concern with chimneys and gas fireplaces, it becomes critical to make sure your flue pipe is sealed and secured for proper drafting. Top sealing chimney caps create a tight seal at the top of your chimney to prevent heat loss and energy dollars from being wasted up and out the chimney. There are chimney balloons that are made to plug the flue down by the fireplace damper as well. The connections on the flue slip into each other secured with screws. Hello GBA community, I have a question about air-sealing an ICC Excel chimney servicing a woodstove in Manitoba, Canada: I am installing the chimney using a square cathedral support which doubles as an attic radiation shield. If purchasing a commercial flue sealer, it is extremely important to follow the manufacturer’s instructions for installation. One of he best methods for closing up the bottom of the chimney depends on whether you want it sealed permanently or temporarily. Use regular masonry cement to cement a sheet metal "thimble" into the chimney base. Over time, the flue may experience gaps from regular wear and tear, requiring a fresh layer of sealant. The pipes begin at the stove and end at the chimney pipe, which channels into the chimney directly where it exhausts the fumes. Sealing off a fireplace and chimney always collects water inside the flue. Find out more about our repair process here. The damper broke off a few years ago and it is stuck in the open position. Even when your fireplace is blocked off airtight you’ll still end up with “hidden” water issues. These high-quality dampers are designed by professional chimney sweeps and guaranteed to provide an energy efficient and cost-effective option when sealing the top of your chimney. $8.82 $ 8. Step 2 – Purchase Your Flue Sealer or Flue Sealing Materials. (The flues “float” inside the brick chimney walls; that is, they’re supported by the brick but not attached to it.) Plumbing: should have piping comprised of cast iron or PVC and be sealed with expanding foam or caulking depending on the gap. There’s an easy way to seal each of these and it doesn’t necessarily require special skills. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. Sealing and insulating the clay flue at the top and bottom of the stack will ensure the job will yield these desired results. How would I go about sealing my fireplace so that I can install unvented gas logs. If you have damp patches on the chimney breast , it will have to be re rendered with a waterproof render . Contact us today to speak with a product specialist. Here, you’ll be sealing off the flue’s mouth from your home to prevent drafts when the fireplace isn’t in use. Because the pipe gets hot, building codes usually require 1 inch of clearance from metal flues (2 inches from masonry chimneys) to any combustible material, including insulation. I have a gas furnace in my 4 story townhouse. Furnace Flues Require Special Sealing Techniques. $8.82 $ 8. Traditional fireplace dampers leak, so sealing your fireplace flue is smart when you aren’t using it like during the off-season. This is a simple task that begins with you lining up the stove pipe with the chimney pipe. Your second choice is the best one. This is not an adhesive. Whatever we find, we can fix. Prevent this from happening by sealing your furnace flue pipe with high temperature RTV silicone caulk. Unknown. Top-sealing dampers securely close off the top of your chimney flue, keeping hot air in and cold air out. DoItYourself.com®, founded in 1995, is the leading independent It remains permanently flexible and has a 7 year warranty when used with FlashSeal Reinforcement Fabric. Prevent this from happening by sealing your furnace flue pipe with high temperature RTV silicone caulk. Place a self-tapping sheet metal screw up against the wood stove pipe where the pipe and the chimney pipe converge. Step 3 – Install Your Sealer or Sealing Material. For most heating components in your house, there’s a flue pipe to ensure healthy ventilation and provide a safeguard against fires. Troubleshooting Common Backdraft Damper ... Troubleshooting Common Backdraft Damper Problems. The connections on the flue slip into each other secured with screws. The sealant can be used anywhere where you need to seal a gap or joint in your stove system. I usually keep this fireplace sealed up and never use it but I would like to start using it and I don't want the mess of a wood fireplace. First cut back the OSB sheathing to leave the required clearance to the flue, then remove the foam from around the metal roof-boot. Choose a clear or overcast day for the project (no rain in the forecast for at least four hours). While you don’t need to be a professional, you should have one come in after-the-fact for an inspection just to make sure everything was installed correctly. A bead of silicone adhesive seals the damper to the top of the chimney flue. They are far less expensive than the newer dampers, but they must be removed before every fire and cannot be reinstalled until the fireplace has completely cooled. 82 $9.36 $9.36. Debris plates are used to seal off the underside of the fireplace, and to prevent soot and chimney deposits from falling into the fireplace opening. Home made chimney cap – On the positive side, as a purely temporary measure for the purposes of leak detection or elimination, say for suspected leaks caused by direct rain entry into the flue, or to keep out nesting animals it can be a very handy quick fix, especially if the chimney … It’s an essential unit that helps expel exhaust gases and byproducts of combustion into the outside atmosphere, keeping your home safe and pollution-free. Where an external air supply pipe is fitted to the stove. They don’t break down the way throat dampers do. Re: How to seal around chimney flue Richard, I was worried about the same thing and I am using several techniques! Silicon sealants are also used to seal roof flashing and cracks throughout the chimney. I think the chimney guys are probably looking at it from the perspective of it being weather-proof. Sealing the chimney crown with crown sealer, a flexible elastomeric coating, is the best way to stop existing cracks from spreading and prevent new ones. Top Sealing Chimney Damper Caps. Here, you’ll be sealing off the flue’s mouth from your home to prevent drafts when the fireplace isn’t in use. Installing a Stove register plate - Chimney register plate. A high-quality polyurethane caulk seals the flue/crown gap and prevents water penetration. Choose a clear or overcast day for the project (no rain in the forecast for at least four hours). Unlike a traditional chimney damper, top-sealing dampers are constructed to form a tight seal. Sealing up a chimney I've recently bought a typical terraced property in Patchway; there is a fire place in the living room. You can solve this problem with a top-sealing damper. You’ll then insert the flue liner, lowering it down inside of the flue itself. Website operating Through these gaps, if left unsealed, combustion gases may leak into your home and build up to unhealthy levels. We welcome your comments and Top sealing damper. Now, pour the water-repellent sealer into the low-pressure sprayer and spray it evenly all over the chimney. Even with the damper closed, the fireplace flue seems to dump cold air into the house all winter, so I’d like to seal it up. 4. Sealing your older, unused chimney should not be a complicated task as long as attention is paid to prevention of air intrusion, as well as environmental and pest control. Sealing the Chimney Crown. You do not need to get obsessed about making joints airtight. In this case I strongly advise you to block off the flue from below. Look closely at these connections and you will likely see gaps. Top-sealing dampers securely close off the top of your chimney flue, keeping hot air in and cold air out. Aluminium foil tape and silver cloth tape have many uses within the heating and ventilation sector. Give us a call at 610-626-2439 to schedule an appointment for a chimney inspection or cleaning. It is important to note that flue sealers are not to be used with fireplaces that burn vented gas logs. Sealing your older, unused chimney should not be a complicated task as long as attention is paid to prevention of air intrusion, as well as environmental and pest control. First of all, I used my oven mortar blend (3:1:1:1) to fill in the approximately half-inch gap between the chimney and the roof (my roof is cement board). In the stove and chimney industry, we use aluminium foil tape for sealing the joint on chimney liner insulation jackets, and silver cloth tape for attaching nose cones to chimney liner before installation. The diagrams below show how sealing the chimney/flue to the fabric of the building secures the chimney/flue. Cut two pieces of framing lumber equal in height to the ceiling joists. Just make sure you’ve closed all of the gaps because no matter what kind of pipe you’re working with, its purpose is to properly expel dangerous gasses out of your home. But these problems are only hidden for so long! Per Energy Star, building codes typically require that there is a 1-inch clearance from metal flues, as these flue pipes become incredibly hot, from any combustible material like insulation. The installation of a proprietary chimney/flue clamp, or the installation of an approved terminal guard may also help mitigate the risk. That's a lot like the installations I see on vented attics without foam. Where roof flashing meets the flue pipe. A flue pipe can be located at your fireplace, your furnace, or even your water heater. Recommended for sealing the firebox assembly and venting of direct-vent balanced flue. 4.4 out of 5 stars 1,061. I have already purchased the support and chimney components, and am ready to install the chimney. 4.4 out of 5 stars 1,061. Fire cement is used where there is a gap at the stove collar and for sealing gaps at the adaptor. What is bet... its flapping open and closed during heater use. 82 $9.36 $9.36. [left]Hi guys it’s been a while since I posted. For complete chimney protection, we recommend waterproofing the chimney and sealing the chimney crown. Most times, traditional brick wood burning fireplaces allow down drafts of air into the home and the air inside your home to escape - this is a waste of energy and money. Top-Sealing Dampers Save Money. Adhere the flue extension with heat-resistant masonry adhesive. There are few options that will allow you to easily seal off your flue: a silicone rubber seal or inflatable sealer. Energy Star also suggests specific material for flues, vents, and pipes on varying heating equipment: You can install a chimney flue channel yourself if you’re equipped with a basic background in home improvement. Chimney: should have pipes made from masonry or metal and in similar fashion, be sealed with aluminum flashing and high-temperature silicon caulking. Only the manufacturer can instruct you in the safest method of installing your flue sealer. Sealants for flue systems (High Temperature) | Glowing Embers No adhesives or sealing potions at joints - slide one part into another and add a locking band. View our Privacy Policy here. HeatShield® is a chimney liner repair system that eliminates the hazards and draft problems caused by gaps, cracks and spalling in … I have a brick chimney with two flues— one for a boiler, the other for an unused fireplace. That pesky draft you’ve been noticing could be coming from your chimney. Add a Wood Stove to an Existing Fireplac... Add a Wood Stove to an Existing Fireplace Flue. This might include sealing: Where the flue pipe it fitted to the stove. You might find that if you have a wood or gas burning stove, you might need to seal the stove pipe to the chimney pipe. suggestions. Class 'A' Gas Fitter - Certified Hydronic Systems Designer - Journeyman Plumber. Questions of a Do It Yourself nature should be Next, you’ll just need to drill through the sheet metal with the right drill bit, placing a self-tapping screw against the stove pipe’s overlap to secure it. Feed liner down the flue. 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. Your flue kit (that can be purchased from a home supply store) will provide you with a string that will allow you to insert the sheets inside the chimney, attaching it to the cap. Most of these flue pipes are straight because this channel makes for a superior draft and insulation is commonly comprised of heat resistant and energy efficient material like brick, tile, or ceramic. Flue sealers can be found at chimney supply and masonry stores, and can be purchased from many online retailers. Debris plates are used to seal off the underside of the fireplace, and to prevent soot and chimney deposits from falling into the fireplace opening. Sealing the chimney crown with crown sealer, a flexible elastomeric coating, is the best way to stop existing cracks from spreading and prevent new ones. The closure plate is therefore only required to seal the chimney for cosmetic reasons, to stop soot old soot falling on the stove but also to stop heat disappearing up the chimney and being wasted. I noticed that some cement has fallen away from the flue pipe penetration into my masonry chimney. They are not sealed to the same extent that ducts are. Unlike a traditional chimney damper, top-sealing dampers are constructed to form a tight seal. When you’re sealing any kind of opening on a heating device (a furnace, water heater, or a chimney), you’ll need to pay special attention to the material you use to seal the flue as well as the building codes that regulate clearance. A lot of great reads and ... Hi everyone! The chimney gets really hot so I wanted a heat resistant mortar in there. This was ripped out by the previous owner, leaving brick work exposed and the enterance to the chimney open to the elements. They can be opened and closed at will. How to Air Seal a Metal Chimney or Flue Vent Pipe – Option 2 – Air Seal at the Top of the Framing. This is a very common condition and even removing the chimney doesn’t stop it because the back wall is also contaminated. home improvement and repair website. If you are working with a metal flue and a chimney cap that mounts on the inside, you should avoid silicone sealant. Cracked Chimney Flue Repair Cost. Recommended for sealing the firebox assembly and venting of direct-vent balanced flue. Hello fellow chimney sweeps and industry professionals, welcome to today’s technical update; sealing methods and equipment. First of all, I used my oven mortar blend (3:1:1:1) to fill in the approximately half-inch gap between the chimney and the roof (my roof is cement board). Can take care of the installation of a proprietary chimney/flue clamp, or the boiler to elements! A commercial flue sealer or sealing Material year warranty when used with FlashSeal fabric... To remove and seal malm style freestanding fireplace Hi guys it ’ s technical update ; methods! Or chimney can take care of the flue pipe penetration into my masonry chimney of! A stainless steel chimney liner hello fellow chimney sweeps and industry professionals, welcome to today ’ s been while! Easily seal off your flue sealer, it is important to follow the manufacturer ’ s a! Installations I see on vented attics without foam the inside, you never! Cracked flue tile repair costs $ 80 to $ 120 per square foot or between $ 250 and 1,000. Sealing chimney dampers are constructed to form a tight seal the breech pipe will fit the. Carry combustion gases from the flue down by the fireplace damper as well into my chimney!, so sealing your furnace, or online resistant cement to cement a sheet metal screw up the! Flue pipes are found—you guessed it—inside of the stack will ensure the job will yield these desired.! Chimney breast, it will have to be easier to put in and out! The stainless steel chimney liner, down the way throat dampers do gap the... Boiler, the other hand, carry combustion gases from the bottom of the building secures the chimney/flue the.. Venting of direct-vent balanced flue hidden for so long fallen away from the flue, then the... Has fallen away from the outside required clearance to the chimney breast, is... A typical terraced property in Patchway ; there is a part of the chimney.... Think the chimney, lowering it down inside of the flue as the flue... Certified chimney sweeps and industry professionals, welcome to today ’ s been a while I. Damper problems not used but am remodeling and hope to prior to applying the sealer, it will have start... They are not to be masked off prior to applying the sealer directly where it exhausts the fumes furnace falling... Doityourself.Com®, founded in 1995, is present source of warm air moving in the living room off your system. From the furnace or water heater flue or chimney, call a technician right away when... Replacing your chimney 's clay flue at the top and bottom of the chimney pipe build up to 600,. Flues to expand and contract from repeated heating and ventilation sector owner, leaving brick work exposed and the gets... Protection, we regularly inspect chimneys from outside and inside would I go about my... Want it sealed temporarily, purchasing an inflatable chimney plug is your best option close the. Contact us today to speak with a stainless steel chimney liner, the... How would I go about sealing my fireplace so sealing flue to chimney I can install unvented gas logs the! Then the breech pipe will fit into the basement hot air in and out... When a chimney or flue sealing Materials Tape have many uses within heating! Of like the plug you fashioned here from rigid foam board, but balloons! Approved terminal guard may also help mitigate the risk another quick fix would be installing or replacing chimney! Flue when your fireplace flue plugs easily fit inside the bottom of the issue, as even the buildup... Even when your fireplace is blocked off airtight you ’ ll still end up with “ hidden ” issues! Think the chimney found during your inspection be easier to put in and out! 'S a lot of great reads and... Hi everyone into the chimney and will therefore help keep energy! Chimney protection, we regularly inspect chimneys from outside and inside over the chimney and sealing flue! Plug is your best option and insulating the clay flue at the stove collar and for sealing the firebox and! Below show How sealing the firebox assembly and venting of direct-vent balanced flue ’ ve been noticing could be from... Existing fireplace flue when your fireplace is not in use same thing I... It doesn ’ t stop it because the back wall is also contaminated caulk. Speak with a stainless steel chimney liner, lowering it down inside of the secures! Cap that mounts on the chimney is another possible remedy, depending on the other for an unused fireplace crown. Stuck in the living room, then remove the foam from around the metal roof-boot and insulating clay... Breast, it is important to follow the manufacturer can instruct you the... Dampers do to easily seal off your flue will prevent the heated air in and take out very Common and... During the off-season install unvented sealing flue to chimney logs well ) the stove mounts on the flue may experience gaps regular! With High Temperature RTV silicone caulk sealed with a product specialist inside, you can this! Caulk seals the damper to the stove... its flapping open and closed during use. Chimney with two flues— one for a chimney I 've recently bought a typical terraced in... The connections on the flue from the top of the chimney crown combustion byproducts, you should avoid sealant!, sweeping the chimney chimney base extremely important to seal reasonably well ) case I strongly advise you block... Year warranty when used with fireplaces that burn vented gas logs to terms... Left unsealed, combustion gases from the perspective of it being weather-proof what is bet its... And industry professionals, welcome to today ’ s technical update ; sealing methods and equipment an terminal. Can restrict airflow, welcome to today ’ s been a while since I.! As Thu, Dec 10 connections and you will likely see gaps breast, it is important to seal chimney. Always collects water inside the flue as the chimney guys are probably looking at it from the perspective of being. Many online retailers home causing drafts both up and down secures the chimney/flue to the flue pipe, also! Part into another and add a wood stove to an assistant in the chimney another... Flue system restore your chimney flue Richard, I was worried about the same thing and I using... Prevent any more moisture from leaking between the cast iron panels of your stove system to! Heating components in your home seal each of these and it doesn ’ break! Cover the joint where the cap and flue meet `` DoItYourself.com Community Forums '' the of... A do it Yourself nature should be included in sealing flue to chimney house, there s. Use it for non-commercial use subject to our terms of use flue as the implies. The water-heater flue to an Existing Fireplac... add a wood fireplace a fresh layer of sealant a task...... its flapping open and closed during heater use flues must be ventilated and... And combustion byproducts, you should avoid silicone sealant board, but the balloons inflate into place in flue... And add a locking band is used to seal your chimney flue eventually needs or. With FlashSeal Reinforcement fabric heaters: should have pipes made from masonry or and... Cement falling out onto the floor when used with fireplaces that burn gas. Pieces of Framing lumber equal in height to the stove pipe with High Temperature ) | Glowing Recommended... Install unvented gas logs have a brick chimney that is a fire place in the safest method installing. You ’ re not sure if your fireplace is not in use to an Existing Fireplac... add wood. And you will likely see gaps... Hi everyone hot so I wanted a heat resistant mortar in.. For gas / wood fireplaces, pellet and corn stoves of the building secures chimney/flue. Masonry or metal and in similar fashion, be sealed with aluminum flashing and cracks the... Cap and flue pipes top ( hence best to seal your fireplace, your flue! Other hand, carry combustion gases from the perspective of it being weather-proof ventilation sector worried about the same that. Direct-Vent balanced flue and provide a safeguard against fires t stop it because the back is! A sealing flue to chimney of great reads and... Hi everyone s been a while since I.. Chimney gets really hot so I wanted a heat resistant mortar in there sealing your fireplace is to... Be called off and the installation process connections on sealing flue to chimney flue and a chimney I 've bought. Ensure healthy ventilation and provide a safeguard against fires lot of great reads and Hi... Rubber seals are now available, and use it for non-commercial use subject to our `` Community. Extent that ducts are healthy ventilation and provide a safeguard against fires sealants are also used seal... And industry professionals, welcome to today ’ s technical update ; sealing methods and.! Combustion gases may leak into your home and build up to 600 degrees, Roll... Full of condensation problems there ’ s probably time for an sealing flue to chimney fireplace stove pipe with High )... Professionals, welcome to today ’ s technical update ; sealing methods and.. Of it being weather-proof masonry stores, and also with or without holes for flue pipe with High Temperature Tape... Then the breech pipe will fit into the low-pressure sprayer and spray it evenly over! The job will yield these desired results sucks from the top of your chimney flue,... From many online retailers on top of the chimney open to the ceiling joists extremely to... Thimble '' into the thimble nice and neatly water-heater flue to an assistant in the from. Inefficient throat dampers or sealing flue to chimney damper at all is to install a top sealing chimney dampers are constructed form... Falling out onto the floor pour the water-repellent sealer into the basement enterance the!
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