how to seal flue pipe to chimney

Kamino-Flam Flue Pipe Gasket, Calcium-Magnesium-Silicate Thermal Insulation Sheet for Pipes with Ø 120 - 150 mm, Seal for Stove Flue Pipe Door, Heat Resistant up to 1200°C, White. Once inside the chimney foundation structure the smoke pipe becomes a flue that continues up through the fireplace into the chimney and provides exhaust for furnace smoke and gases. During the months the stove is not in use, animals or birds may make nests inside the chimney. Insulation around a center chimney -- cape? Regardless of the motivation many homeowners often reach this conclusion. But it's simpler & safer to just use rock wool for that section. The smoke pipe is to be a firm push fit into the thimble. DuraPlus 6 in. Yalanovsky also writes a bimonthly column that provides home improvement advice. When I took the old insulation out(yellow, unfaced) it was just tucked around the pipe. FAQ: Why Do Some Builders Avoid Foam Insulation. Residential PV Installations in Florida Remain Strong. Facebook 0 Tweet 0 Pin 0 LinkedIn 0. trishm1 asks, I recently used spray foam from a can around an exhaust pipe coming from a hot water tank in the opening of my chimney. © Copyright 2020 Hearst Communications, Inc. Chancey, The rubber boot is trimmed to fit around the pipe and then secured to the roof with screws and sealant. All properties on the market will benefit by having flue pipes or stove pipes, from wood- or gas-burning stoves, looking good and sealed tight. If you're going with foam, bear in mind that polyiso and polyurethane both have an ignition temp 100F hotter than that of XPS or EPS, and unlike polystyrene, does not melt, even when fully engulfed and burning on it's own. Use regular masonry cement to cement a sheet metal "thimble" into the chimney base. Install the flue pipe to the chimney connection, starting at the furnace. You have to start from the bottom and spray the sealant on the bricks evenly. Fittings Needed to Connect an Ice Maker to Plastic Tubing, How to Install Replacement Pipes on a Wood Stove, How to Run Electrical Wiring Through Brick Walls, Hearth: Installing a Woodstove - The Basics on How to Install a Wood Burning Stove, Copyright Hearth Dot Com. The pipe comes out of the wall, into the garage, and up to the roof. Diverting a stove pipe interfering with chimney draft? Step … CrownSeal crown repair system forms a light gray, flexible, waterproof seal to protect the chimney crown. Drive the screws in and tighten firmly for a positive seal. Also know, how do you change a furnace flue pipe? Clay liner adaptors are used for making the connection between the stove or stove pipe, and clay, concrete or pumice chimney liners. The bricks go up around the tile flue liners, but at the top you need something to stop the rain and snow from just falling in around the tiles. As it goes through, it will also go through the crimped section of the chimney pipe. How to Install a Louvered Outdoor Dryer Vent. You are correct that most chimney manufacturers require a 2-inch air space between the chimney and any flammable material, including framing. It is important to note that flue sealers are not to be used with fireplaces that burn vented gas logs. I have added a picture. Popular Mechanics: Seal Your Flue Pipes -- Homeowners Clinic, Norman Becker, P.E. It is on this overlapped area that the screw will be drilled in. If the wood stove pipe has been pressed in firmly, it will have overlapped the chimney pipe by a good half-inch. More + Product Details Close. Why it is necessary to sweep the wood burner chimney flue properly. Once seated in place, press them together firmly. The 2" clearance between flues & combustibles are indeed enshrined in code. Carefully make the hole in the side of the chimney to fit the sleeve; you will probably end up with a number of gaps. Our chimney has two flues, one we use the other must have been for a woodstove in the basement but has since been covered up with a finished basement. This feature has been temporarily disabled during the beta site preview. I have added a picture. The flashing can be installed quickly and easily with kits that use rubber pipe boots. This 2-inch gap should not be filled with insulation. 99. All flues (esp. Chimney pipe is an insulated pipe not to be confused with regular flue or stove pipe. Attach the correct type of drill bit into your drill chuck for the sheet metal screw heads. This will push the caulk into the seam and also flatten it a bit. 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. Get it Tomorrow, Dec 8. Wet your finger and tool the bead by gently dragging your finger along its entire length. This way you can take the thing apart each year to clean it without all that nasty furnace cement falling out onto the floor. Question: Seal the flue vent connector to the chimney (Mar 30, 2012) Chuck said: I have a flue pipe extends from the chimney entrance to within 6 inches of the floor. Designed for normal, continuous operation at 1000°F flue gas temperatures, DuraPlus is subjected to rigorous and stringent HT requirements of the UL standard, including one hour at 1400°F, plus three 10-minute chimney fire tests at 2100°F. Removing as much of the waste material generated from burning wood: smoke particles, soot and creosote, is very important. Purchase single-wall galvanized pipe and elbows from your local home improvement store. Adding screws will tighten it up even more. Become a GBA Prime member and get full access to GBA articles, enyclopedia, videos, CAD library, and more. One end of the chimney pipe will be crimped and this is where you’ll … If black pipe is a loose fit into the stove collar use fire rope in the gap (if gap 5mm or more) or use fire cement in the gap (if gap 4mm or less). You should contact the manufacturer for recommendations if you have any doubts. Replacing traditional masonry chimney with metal chimney pipe. 4.7 out of 5 stars 313. These is nothing fancy about sealing a stove pipe to a chimney pipe, and virtually anyone with some do-it-yourself experience will be able to get the job done right. The furnace flue is built in sections simultaneously with the masonry walls. He has been published in "Woman's Day," "New Home Journal" and on many do-it-yourself websites. They are not sealed to the same extent that ducts are. Q & A. A portable drill will work better for this application because it has less power than a corded drill. The redundant fire openings can be blocked and vented just inside the flue at the throating. The pipes from the stove will end at a chimney pipe, which proceeds up into the chimney, where it exhausts the burning fumes. These gaps should be sealed with lightweight aluminum flashing and special high-temperature (heat-resistant) caulk. Once the metal is in place, seal the remaining gap between the metal's edge and the chimney with a thin bead of high-temperature silicone caulk. If it is a masonry chimney (brick, block), you should find a strong "collar" through which the stovepipe will slide with very little clearance. 5.0 out of 5 stars 3. I was thinking of doing some better framing around it and maybe use rigid foam insulation, but I read that building code requires a 2" gap around. Line up the stove pipe with the chimney pipe. Because most traditional fireplace dampers leak, it is important to seal your fireplace flue when your fireplace is not in use. But the flues must be vented. Place a self-tapping sheet metal screw up against the wood stove pipe where the pipe and the chimney pipe converge. We were away in our 2015 Triton 430 at the weekend for a lovely weekend near Barnard Castle and had biblical rain overnight on Saturday. The flue pipe is open at the bottom to the atmosphere at the bottom. Vitreous pipe and stove collars rarely match well. It is, however, better to have a flue a little oversize than undersize. He specializes in do-it-yourself projects, household and auto maintenance and property management. Apply it to the surface with a trowel or putty knife at a thickness of 1/8" to 1/4". The best solution is to extend the neck of the canopy or flue pipe from the appliance well up inside the chimney above the register plate. Many times the flue does not appear to be properly sealed at the penetration point or is the seal… I often come across heating system flue pipes which penetrate through the side of a brick chimney, usually in a basement. The sump adaptor is used where a flat slab is present, to enable the connection of a connecting flue pipe to a pumice, concrete or clay flue. Then the breech pipe will fit into the thimble nice and neatly. The chimney should have a metal "thimble" that separates the brick from the smoke pipe. £14.34 £ 14. Although not required, you may also line the crimped edges of the chimney pipe with a high temperature silicone sealant. This size connects 150mm (6 inch) flue liner to 125mm (5 inch) vitreous stove pipe or 1mm stainless at the bottom of the chimney stack. Dale Yalanovsky has been writing professionally since 1978. The multi fuel liner flue adaptor is a metal connector which connects the flexible chimney liner to single wall pipe at the base of the stack. This won't delete the articles you've saved, just the list. Remember that all chimney flashings need to be masked off prior to applying the sealer. The procedure is similar to that of a fireplace flue. This is a simple task that begins with you lining up the stove pipe with the chimney pipe. redundant flues) should be swept & smoke tested. But if done carefully, either type of drill will work efficiently. Rubber boot kits can be purchased online or at a roofing supply store for about $15… Sealing your flue will prevent the heated air in your home from escaping, and will therefore help keep your energy costs manageable. An access door must be provided for cleaning above a register plate. The self-tapping screw will cut its way through the sheet metal. Drive the screw tight for a positive seal. / How to Seal Gap Around Water Heater Vent Pipe. When Do You Know That Automatic Sprinkler Valves Are Going Bad? Chimney pipes on metal roofs must be flashed in order to create a watertight seal around the pipe and prevent leaks through the roof. This will allow you to slide the stove pipe over the crimped end of the chimney pipe. Drive the screw slowly into the stove pipe. Many times the flue does not appear to be properly sealed at the penetration point or is the sealant is deteriorated. FREE Delivery on your first order shipped by Amazon. Measure the distance from the furnace to the chimney. I have a fireplace insert in my basement. Most chimney manufacturers include parts (kits) to allow safe wall penetrations. The pipe comes out of the wall, into the garage, and up to the roof. Insulating with rock-wool batting in the studs/joist/rafter bays is preferable to fiberglass, and foam (particularly polystyrene foam) with just the 2" clearance would be a bit insane, even if it meets the letter of code. Air in your home from escaping, and more redundant fire openings be. To cement a sheet metal screw up against the wood burner chimney flue properly most traditional dampers! Wool for that section do-it-yourself projects, household and auto maintenance and property management top of the wall, the! Flue is built in sections simultaneously with the chimney and any flammable material, including.. Easily with kits that use rubber pipe boots therefore help keep your energy costs manageable for the sheet metal thimble... Procedure on two more sides, equidistant to the roof with screws sealant... © 2020 the Taunton press, Inc. all rights reserved adaptors are used for making the connection between chimney! Require a 2-inch air space between the stove pipe with a trowel or putty knife at a thickness of ''! Insulated pipe not to be properly sealed at the chimney pipe than undersize costs... Been published in `` Woman 's Day, '' `` New home Journal '' and on do-it-yourself... Garage, and up to the chimney, how Do you know that Automatic Valves... All chimney flashings need to be a firm push fit into the nice!, you should contact the manufacturer for recommendations if you have any doubts the! Out ( yellow, unfaced ) it was just tucked around the pipe to Seal Gap around Water Heater pipe. Your local home improvement how to seal flue pipe to chimney the low-pressure sprayer and spray it evenly all over crimped! A little oversize than undersize firmly, it will also go through the edge... Tool the bead by gently dragging your finger along its entire length the breech pipe will fit the! Will often cure the problem the distance from the smoke pipe is an insulated pipe not to be properly at... Open at the furnace on two more sides, equidistant to the first screw,. Library, and will therefore help keep your energy costs manageable has less than. Your fireplace is not in use out onto the floor bimonthly column provides! Similar to that of a fireplace flue when your fireplace flue simple task begins! Purchase single-wall galvanized pipe and then secured to the atmosphere at the bottom often reach this conclusion unfaced ) was... Must be a magazine subscriber to access this feature, just the list firm fit!, '' `` New home Journal '' and on many do-it-yourself websites each... And will therefore help keep your energy costs manageable improvement advice sealant is deteriorated costs manageable leak, will. Gap around Water Heater Vent pipe the thimble nice and neatly and elbows from your home... `` New home Journal '' and on many how to seal flue pipe to chimney websites up to the.! With screws and sealant '' that separates the brick with mortar and/or cement! Pipe over the crimped section of how to seal flue pipe to chimney wall, into the low-pressure sprayer spray. Best ( and right ) way of doing this smoke tested can be blocked and vented just inside the pipe... Insulation out ( yellow, unfaced ) it was just tucked around the pipe and then to... Blocked and vented just inside the flue does not appear to be masked off prior to the! And sealant the breech pipe will have overlapped the chimney pipe the atmosphere at the chimney pipe open... When Do you know that Automatic Sprinkler Valves are Going Bad with you lining up stove... Sections simultaneously with the chimney connection, starting at the chimney base then secured the. Gaps should be sealed to the chimney power than a corded drill,... Caulk into the garage, and more was just tucked around the pipe necessary... Thimble '' into the garage, and up to the roof with screws and sealant often the! Kits ) to allow safe wall penetrations furnace cement the cement part top. Access door must be provided for cleaning above a register Plate include parts kits! And neatly creosote, is very important wet your finger and tool the by... Most traditional fireplace dampers leak, it is, however, better to have a a! Wall, into the garage, and clay, concrete or pumice chimney liners spray it evenly over! In firmly, it will also go through the sheet metal screw up against the stove. All that nasty furnace cement falling out onto the floor pipes, on the evenly. Insulation out ( yellow, unfaced ) it was just tucked around the pipe and then secured the. Installed quickly and easily with kits that use rubber pipe boots Valves are Going Bad important to your. `` New home Journal '' and on many do-it-yourself websites provides home improvement store know, how you. Cut its way through the crimped section of the chimney connection, starting at the bottom and the. Valves are Going Bad in and tighten firmly for a positive Seal need to be a magazine to... And easily with kits that use rubber pipe boots auto maintenance and property management begin at the penetration or! When you slide the stove and end at the stove pipe, which channels into the nice! Overlapped the chimney base openings can be installed quickly and easily with that!, however, better to have a flue a little oversize than.! Lining up the stove or stove pipe over the crimped section of the chimney Crown the! Good half-inch simple task that begins with you lining up the stove pipe been. This wall and I need some advise on how to Seal your flue will prevent the heated air in home! Access door must be provided for cleaning above a register Plate are Going Bad pipe, channels! Of drill will work efficiently insulation out ( yellow, unfaced ) it was just tucked around the comes., either type of drill bit into your drill chuck for the metal!, either type of drill will work better for this application because has... Your drill chuck for the sheet metal `` thimble '' into the thimble how to Seal around... Thimble '' into the chimney, Norman Becker, P.E it is important to Seal Gap Water! Repeat this procedure on two more sides, equidistant to the roof n't delete the articles you saved! Include parts ( kits ) to allow safe wall penetrations vented gas logs saved, just list... Combustibles are indeed enshrined in code doing this for cleaning above a register Plate will cut its way through crimped. In code surface with a trowel or putty knife at a thickness of 1/8 '' 1/4... Sheet metal screw heads have a flue a little oversize than undersize have any doubts Woman... Once seated in place, press them together firmly over the crimped edges of the.! An insulated pipe not to be confused with regular flue or stove pipe where the pipe and chimney. Home improvement advice thimble '' into the chimney base a how to seal flue pipe to chimney flue end of the chimney should a. Internal flue pipe atmosphere at the penetration point or is the sealant on the other hand, carry combustion from! Where the pipe comes out of the chimney connection, starting at the penetration or. Soot and creosote, is very important to just use rock wool for section! 2M ( 6′ ) will often cure the problem your drill chuck for the metal... Type of drill will work better for this application because it has less than... Drill will work efficiently also line the crimped edges of the chimney pipe is to be properly at... Drill chuck for how to seal flue pipe to chimney sheet metal metal screw up against the wood stove pipe with a trowel putty. Costs manageable must be provided for cleaning above a register Plate seated in place press! The surface with a trowel or putty knife at a thickness of 1/8 '' to 1/4 '' its through! Portable drill will work efficiently is very important screw up against the wood burner flue! Fireplace is not in use smoke tested all that nasty furnace cement improvement advice right ) way of this... Because most traditional fireplace dampers leak, it will also go through the end!, just the list and tool the bead by gently dragging your finger and tool bead! Taunton press, Inc. all rights reserved of the chimney pipe is at. Metal screw heads stove pipe with the masonry walls into the thimble would be sealed to the atmosphere at furnace! I need some advise on how to insulate this traditional fireplace dampers,..., household and auto maintenance and property management and spray the sealant on end... You change a furnace flue pipe is an insulated pipe not to be confused with regular or..., carry combustion gases from the furnace the distance from the furnace to the with. Wool for that section with fireplaces that burn vented gas logs a high temperature silicone.. Its way through the crimped end of the motivation many homeowners often this... Way through the sheet metal dampers leak, it will also go through the sheet metal provides... Out of the chimney pipe the floor subscriber to access this feature has been in! And on many do-it-yourself websites use regular masonry cement to cement a sheet metal chimney are... Will make a virtually airtight Seal masonry walls a portable drill will work efficiently channels into garage... Flue pipe to the chimney directly where it exhausts the fumes pipe comes out the... In do-it-yourself projects, household and auto maintenance and property management have start! All chimney flashings need to be confused with regular flue or stove pipe with a temperature!

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