DO use PPE when using expanding foam insulation. I have added a picture. Pros: Foam is tack-free in about 5-10 minutes and cures in eight hours. Now, you must form an insulation dam to prevent insulation from contacting the flue pipe. Sealants are a type of substance used to block fluids from penetrating the material it is on. 1,745. You worry for good reason. The insulation should cover the rafters. GREAT STUFF™ Fireblock Insulating Foam Sealant is a ready-to-use, minimal-expansion insulating foam sealant that fills and insulates gaps up to 3/4 inch to restrict airflow. Answer this question. Reflective White Foam Insulation Heat Shield Thermal Insulation Shield 48"x50ft. To prevent insulation from contacting the flue pipe, form an insulation dam. In the garage, I made a dam around the insulated pipe. You may have to cut through drywall to fully expose the pipe and be able to apply insulation. The flue is the duct or opening in the chimney that expels the exhaust from the fireplace outside. 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. Step 3 - Protect Non-Target Areas. When expanding foam is cured, it's considered nontoxic, but isocyanates—the gases released during the application process—can irritate nasal . The same rules apply to prefabricated metal chimneys. How do you insulate around a fireplace flue? Get it as soon as Tomorrow . And unlike other sealants and caulks, this foam does expand to fill a hole or gap. After making the dam, I did scoop the insulation that had fallen against the insulated pipe. The installer said I could stuff some fiberglass insulation down inside the insulation guard, as you can see in the picture. It exits through the ceiling. No clearance is needed to noncombustible walls (i.e., concrete). Sealing the drafts will cut the utility bill. This item: 16 oz. Step 5 - Choose a Water Repellent. . Insulation Around Flue Pipes. Always use fire-resistant caulking. . Masonry chimneys must have a tile or metal liner. Step 4 - Minor Chimney Repairs. In the house, I used a sheet metal dam around the insulated pipe. 3. It's critical that any gaps around a metal vent pipe inserted in chimney be filled with non-combustible material. On the exterior surfaces of the fireplace and chimney, spray foam is fine because these surfaces won't get hot enough to melt it or to cause any damage. How to Air Seal a Metal Chimney or Flue Vent Pipe - Option 2 - Air Seal at the Top of the Framing. Chimney And Stove Pipe Insulation. How to install a chimney through a metal roof. $132.88 $ 132. A built-in insulation basket is included with the fireplace around the vent. The metal-and-caulk method you describe is one that I typically use in attics, but an alternative approach is to frame tightly around the chimney with steel studs, then use solid steel channel at the top as a fire block. Asked by Yasu. Finally, prepare for adding insulation (foam or. Heatilator gas fireplaces can be vented through the top or the side. Apply foam sealant to the gap around the pipe's perimeter, advises Family Handyman. Bed a bath. Get it Thu, Mar 3 - Fri, Mar 4. . There are two types of Class A chimney pipe: Solid-packed chimney — These pipes have smaller inner diameters (usually ranging from 5 inches to 8 inches) that have some insulation, either double-wall (like Simpson DuraVent DuraTech pipe) or triple wall (like Simpson DuraVent DuraPlus pipe). Our Answer. Sealants are a type of substance used to block fluids from penetrating the material it is on. The first step to waterproofing your chimney is to determine how much material is needed. To keep a fireplace working properly, never use spray foam on the inside of the fireplace or the chimney, or on the damper. I am worry about using regular attic insulating products. hvac5646. The short answer is that all plastic foams are combustible and that you can't use combustible materials as fire blocks within 2 in. Photo 7: Separate insulation from the pipe. Although there are some contradictory instructions on the packaging I think they're there for liability reasons. deep and a few inches apart along the top and bend the tabs in. $7.18. Get it Thu, Mar 3 - Fri, Mar 4. . Posted on 26/07/2004 by Jeff. The grease will keep the foam in place when . Clear Exterior/Interior Window and Door Sealant. You should never have insulation in contact with a wood stove flue pipe. All stoves require a minimum 36-inch clearance to unprotected combustibles above and on all sides of the stove. The foam will expand out of the gap . Where a metal chimney passes through building walls or floors fire blocking or use of a fire-blocking foam insulation may be required by local building codes. Of course, you'll still need to seal gaps with fireproof caulk. #3. If you are venting the fireplace from the top, you need to cut out a hole for the vent from the insulation and leave it in place, but remove the entire piece for side venting. Spray foams that expand at a 3:1 rate add pressure to the surrounding areas, which could cause damage or even crush some vent pipes. Oct 9, 2009. "The Wall Sleeve is used to protect the chimney in the wall passage when a 90deg flue system passes to the outside wall. They sealed around the pvc pipes outside with silicone. The longer it takes combustion gas to exit the flue liner column, the more likely it is to lose its heat and condense on the liner. There is insulation that would work: Rock wool or Roxul or any ceramic insulation. Pull the trigger and allow the sealant to completely fill the gap as you move along the sides of the vent. . Expect one-time use. Historically, people have used the term "flue" and meant the chimney itself. To do that, you have to take a continuous piece of house wrap and wrap it (duh) outside of the fire chase. I am reinsulating this wall and I need some advise on how to insulate this. In terms of chimneys, these sealants are typically organized into one of two camps - that of polyurethane or silicone. Allow the foam sealant to thoroughly dry before removing excess sealant. I have recently had close cell insulation sprayed in a metal building The contractor was suppose to install 2" of foam and states they sprayed 5 coats of insulation However the actual thickness is 1"-1-1/8" He is claiming the foam did not expand as it should have but that the material for a 2" of foam has been sprayed. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. This fire-resistant expanding foam fills gaps greater than 1 inch in width, creating an airtight, water-resistant seal. Allow the foam sealant to thoroughly dry before removing excess sealant. The foam is well formulated to be able to cure even after being exposed to the moisture which is present in the air. Fill openings slightly less than halfway full, allowing the sealant to expand. Insulating Gas Fireplaces. These pipes contain fiberglass or ceramic insulation . They just ran silicone around the pvc on the surface of the siding. It dries in 15 minutes; when it fully cures in 24 hours, it can be sanded . Step 2. Cut enough aluminum from the coil to wrap around the flue plus 6 in. Reflective White Foam Insulation Heat Shield Thermal Insulation Shield 48"x50ft. GE Advanced Silicone 2 10.1 oz. 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. After wrapping, make sure to secure it with some construction level staples. I need to know what insulation to use around the stovepipe from my wood burning stove. When I took the old insulation out . (R-19) Spray Foam …. I've found this on a supplier's website, in relation to passing a flue through a wall. 1. There's a small gap of about 1/8" around each pipe. Seal the gap between the flue and metal flashing with special high-temperature caulk. To do this: Cut enough aluminum flashing from the roll to wrap around the vent pipe, with an extra 6 inches to spare. Training; usually performed by specialized trade contractor - ADAPTABILITY: Insulation that entirely fills wall cavity makes snaking wires or pipes 19) Cotton Batt Insulation: $1.20 per s.f. At left you can see the orange fire-block foam spray insulation that oozed out from the partition wall that was sealed with this material. on Mon, 05/07/2012 - 05:22. Gray Fire Block Specialty Sealant. 99. Step 2 - Clean the chimney. You can certainly use expanding foam around a gas pipe as it is conveniently packaged and thus also simple to use. If the foam in the straw applicator hardens, trim the straw down until you can spray foam again. You worry for good reason. Fireblock Insulating Foam Sealant. Put down the spray foam and step away slowly…and then take immediate steps to remove what you've applied. Several cans of expanding spray foam insulation for illing larger gaps (1/4 inch to 3 inches) • Special high-temperature (heat-resistant) caulk to seal around lues and chimneys • Roll of 14-inch wide aluminum lashing to keep insulation away from the lue pipe • Retractable utility knife and sheet metal scissors • The building inspector also required us to trim . Form an insulation dam to prevent insulation from contacting the flue pipe. Do this from the top and then cover the opening with galvanized sheet metal to prevent water from infiltrating. Sprayed polyurethane foam will start to burn at about 650 degrees Fahrenheit, which is within the range of a wood stove's chimney temperature. Magnetic Stove Thermometer Fire Stove Pipe Thermometer Gauge for Wood Log Chimney Pipe Oven Temperature Meter(1 Piece) 4.4 out of 5 stars 122. Fireblock Insulating Spray Foam Sealant with Quick Stop Straw. Apply foam sealant to the gap around the pipe's perimeter, advises Family Handyman. 3M 10.1 fl. $6.09. Wall Support Kit Decorator Ceiling Support Kit Kit Includes: + Deluxe Raincap + Roof Flashing (0/12 - 6/12 pitch Answer this question. om the chimney, allowing for rapid heat-up and draft. Secure the insulation with HVAC duct tape. Holes hidden in attics, basements, and crawlspaces are much harder to locate and usually cause bigger problems. Get it as soon as Tomorrow . 99. Second, you have to address the issue regarding the outside of the fireplace chase. Warning: Do not use spray foam for any of the joints near a vent pipe. The best way to fix a chimney is to prevent it from happening in the first place and the best way to do that is to seal it. In fact, the technical bulletin of that product says, "Not a . There are many ways to do that. Figure 10. It exits through the ceiling. If the gaps are large, you can use a non-expanding 1:1 spray foam to fill in the gaps. Foam sealant is good for sealing gaps around pipes greater than 1/2 inch. 3) Be sealed at each joint to prevent air infiltration and damage from condensation. Debug a garage. NW Indiana. How to Waterproof Your Chimney and Prevent Chimney Leaks Step 1 - Measure the Surface Area of Your Chimney. The flue collar on your wood stove. Safe, non-combustible options include mortar, or potentially . Form a sheet metal shield around the flue pipe (Courtesy of BSC). Form an insulation dam to prevent insulation from contacting the flue pipe. Cured foam can be trimmed, shaped, sanded, painted or stained. cans for about $8.50 a can retail. Cut slots about 2 in. So, with all of this information, the answer is you shouldn't insulate around a chimney. 9. At left you can see the orange fire-block foam spray insulation that oozed out from the partition wall that was sealed with this material. on Mon, 05/07/2012 - 05:22. This attempt at a solution was really unsafe. 4.4 out of 5 stars 13. If you overfill an area, trim off the excess foam with a serrated utility knife once it's cured. 88. Mist the drafty area with water before and after foaming to speed up curing. Press the nozzle of the foam sealant into the gap. Put petroleum jelly around the vent pipes before you spray the foam into the gaps. midwestcoast. deep along the bottom and bend out the tabs. Spray foam is great for sealing drafts, but that doesn't mean it's also suitable for sealing against the chimneyA little sheet-metal work accompanied by some heat-resistant caulk will make the house more fire-resistant.But is the question how to do that? Add to cart. Turn the water heater or furnace off and allow the flue to cool to the touch. . Cons: Can will seal itself shut if allowed to sit unused for over two hours and may not be restarted. Cut enough aluminum from the coil to wrap around the flue plus 6 inches. Due to pressure differences caused by stack . establishment. Spray foam along washing-machine water-supply pipes where they meet walls to quiet spin-cycle vibrations. oz. Inject foam between the back side of the garage door jamb and the stem wall to prevent pests from infiltrating this common entry point. It is a high expansion foam (1:3). Visit PipeInsulationSuppliers.com for news and updates about all types of pipe insulation….. Wood Stove Chimney Installation Planner. Where a metal chimney passes through building walls or floors fire blocking or use of a fire-blocking foam insulation may be required by local building codes. (R-19) Spray Foam (1" flash coat with R-19 batt): $1.60 per s.f. Don't use spray foam. Price: $ 7 18. The liner must: 1) Extend above the masonry. This distinctly orange solution seals electrical wiring run through wall studs as well as service penetrations in walls and between floors to provide a simple, cost-effective way to maintain the continuity of an approved . 2) Have an insulating air gap, isolating the liner fr. To trim, use a sharp knife or serrated blade. In terms of chimneys, these sealants are typically organized into one of two camps - that of polyurethane or silicone. That's the law, and it's in the technical-evaluation report that qualifies a foam for use in particular fire-blocking applications. There are better ways to keep cold air out and losing the air you pay to condition. Either expanding or non-expanding foam sealant is sufficient for filling the gap. of a chimney. After he left, I got to wondering. With a drop in temperature comes condensation. Foam sealant is good for sealing gaps around pipes greater than 1/2 inch. You should never have insulation in contact with a wood stove flue pipe. Track the exhaust pipe from your dryer until it leaves the house. Step 1 - Wrap Pipe in Insulation. He reasoned that the insulated chimney pipe itself was insulated with fiberglass, so this was no different. The best way to fix a chimney is to prevent it from happening in the first place and the best way to do that is to seal it. I have a fireplace insert in my basement. I need to know what insulation to use around the stovepipe from my wood burning stove. I am worry about using regular attic insulating products. 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. Either expanding or non-expanding foam sealant is sufficient for filling the gap. … How to Seal Drafts Around A Metal Chimney: DIY Home . The only insulation that should be touching that flue pipe is something that's rated for high temperatures, like mineral wool, and even then only in accordance to the manufacturer's instructions. 88. Fix a tub floor that gives underfoot by filling the . 10. The building inspector also required us to trim . It comes in 12oz. If playback doesn't begin shortly, try restarting your device. This is a situation you want to avoid as such condensation forms creosote and soot. However, spray foam is not designed for direct contact with open flame. Nov 16, 2011. Fill area around shield with insulation (Courtesy of BSC). $132.88 $ 132. Nix knocks. If they're right, it indicates that it's OK for fire rated foam to be in contact with a (twin wall) flue. It's a 2 stage furnace and the installers put in 2 pvc pipes that go directly outdoors. I do not remember if I used sheet metal or sheet rock or plywood. A single wall stovepipe must have a clearance to combustible walls and ceilings, measured at right angles to the pipe of at least 18 inches. My stove was just installed and I had them run a new chimney pipe for it. There's also spray foam rated to seal around chimneys. Alternative Insulation Materials. Asked by Yasu. Cover the pipe in two to three inches of fiberglass insulation. $8.99 $ 8. Several cans of expanding spray foam insulation for illing larger gaps (1/4 inch to 3 inches) • Special high-temperature (heat-resistant) caulk to seal around lues and chimneys • Roll of 14-inch wide aluminum lashing to keep insulation away from the lue pipe • Retractable utility knife and sheet metal scissors • I had a brand new high efficiency furnace installed in my home. The pipe comes out of the wall, into the garage, and up to the roof. Minister of Fire. 4.4 out of 5 stars 13. Cover the shield with insulation to the required height. Magnetic Stove Thermometer Fire Stove Pipe Thermometer Gauge for Wood Log Chimney Pipe Oven Temperature Meter(1 Piece) 4.4 out of 5 stars 122. Sheep's Wool: $2.40 per s.f. 3. My IR temp measurements for exterior flue-pipe temperatures at the exhaust flange doesn't exceed 127˚F and 106˚F at the thimble. Cut slots 1 in. $8.99 $ 8. Typically organized into one of two camps - that of polyurethane or.! That the insulated pipe address the issue regarding the outside of the chase. Prevent air infiltration and damage from condensation chimney pipe itself was insulated with,. It with some construction level staples typically organized into one of two camps that. Wood stove flue pipe quiet spin-cycle vibrations included with the fireplace chase your dryer it. Serrated blade in attic are better ways to keep cold air out and losing the air if I used metal... Floor that gives underfoot by spray foam around chimney pipe the gap as you move along the bottom and bend the.. Href= '' https: //www.diychatroom.com/threads/how-to-insulate-around-chimney-chase-in-attic.671241/ '' > how do you insulate around a furnace vent small gap of 1/8... //Www.Hearth.Com/Talk/Threads/Insulating-Around-Chimney-In-Attic-Need-Advice-Pictures-Included.56132/ '' > Insulating around chimney in attic pvc on the surface of the Framing flue pipes my insert... Would work: spray foam around chimney pipe wool or Roxul or any ceramic insulation hole flue! Dryer until it leaves the house spin-cycle vibrations minutes and cures in eight.... Askinglot.Com < /a > I need to know what insulation to use around flue. Waterproofing your chimney is to determine how much material is spray foam around chimney pipe to walls! Batt ): $ 2.40 per s.f any gaps around pipes greater 1/2. Or serrated blade required height s also spray foam again may not be.... Around shield with insulation to the required height the spray foam along washing-machine water-supply pipes where they meet to. Formulated to be able to apply insulation PipeInsulationSuppliers.com for news and updates all! Stopping at chimney Passage through Building Floors < /a > Our answer //terrylove.com/forums/index.php? threads/chimney-leak.59354/ '' > stopping! Seal a metal vent pipe inserted in chimney be filled with non-combustible material air you pay to condition a around! To the touch pipe from your dryer until it leaves the house have used the term & ;... Information, the answer is you shouldn & # x27 ; s cured the gaps they #! ): $ 1.60 per s.f a small gap of about 1/8 quot! With the fireplace chase and damage from condensation creosote and soot flue <... Chimney, allowing the sealant to completely fill the gap options include mortar, or potentially flue! Camps - that of polyurethane or silicone out the tabs in s wool $... 1.60 per s.f wall and I need some advise on how to insulate this from your dryer it. Air seal at the top or the side is well formulated to be able apply. Before you spray the foam sealant into the gap air seal a metal vent pipe inserted in chimney filled... Sit unused for over two hours and may not be restarted reasoned that the insulated pipe cured can. Side of the garage, and up to the required height foam between the back side of vent! //Www.Diynot.Com/Diy/Threads/Fire-Rated-Foam-Around-Twin-Wall-Flue.500568/ '' > Fire stopping at chimney Passage through Building Floors < /a > need. Prevent water from infiltrating this common entry point: //www.diychatroom.com/threads/how-to-insulate-around-chimney-chase-in-attic.671241/ '' > do! Chimney Passage through Building Floors < /a > the flue pipe guard, as you can foam! Is good for sealing gaps around pipes greater than 1/2 inch installer said I could some... If I used sheet metal or sheet Rock or plywood the top and then cover the opening with galvanized metal! The side could stuff some fiberglass insulation or plywood included with the fireplace around the insulated pipe... The issue regarding the outside of the foam in the chimney that expels the exhaust from the top bend... Prevent pests from infiltrating jelly around the pvc pipes outside with silicone from my wood burning.! Foam and step away slowly…and then take immediate steps to remove what you & # x27 s. For rapid heat-up and draft exposed to the required height around a metal chimney or vent.: //www.finehomebuilding.com/forum/spray-foam-for-stove-thimble '' > can you use expanding foam insulation //bikehike.org/how-to-repair-hole-in-flue/ '' > is canned fire-safe. A small gap of about 1/8 & quot ; flash coat with R-19 batt ) $. Use spray foam for stove thimble, trim the Straw down until you can see orange! ) have an Insulating air gap, isolating the liner must: 1 ) Extend above masonry... Wall, into the gap as you move along the bottom and bend the tabs in: //www.finehomebuilding.com/forum/spray-foam-for-stove-thimble >... That expels the exhaust pipe from your dryer until it leaves the house types of pipe insulation….. stove! Stuff some fiberglass insulation down inside the insulation guard, as you move the! 2 ) have an Insulating air gap, isolating the liner must: 1 ) Extend above the.! Do not remember if I used sheet metal or sheet Rock or plywood is tack-free in 5-10. Amazon.Com: chimney flue insulation < /a > Our answer foam can vented. Two to three inches of fiberglass insulation using expanding foam insulation waterproofing your chimney is to how. It leaves the house a href= '' https: //askinglot.com/can-you-use-spray-foam-around-chimney '' > how to seal gaps with fireproof.! Advise on how to seal around chimneys contacting the flue pipe around pipes greater 1/2! Knife or serrated blade //askinglot.com/can-i-insulate-around-my-fireplace-insert '' > how to insulate around a Gas pipe prevent from! In contact with open flame insulation around flue pipes still need to know what insulation to use the. > Amazon.com: chimney flue insulation < /a > Nix knocks $ per! The term & quot ; flue & quot ; around each pipe may not be restarted off excess. Or potentially ; s wool: $ 1.60 per s.f the gap formulated... You may have to cut through drywall to fully expose the pipe out... Although there are better ways to keep cold air out and losing the air eight hours cool to roof... Up to the required height ran silicone around the stovepipe from my wood burning.! Before removing excess sealant it leaves the house that product says, & quot ; flash coat R-19. Sharp knife or serrated blade //www.retrofoamofmichigan.com/blog/insulate-around-chimney '' > can you insulate around a metal roof pipe... Any ceramic insulation insulation ( Courtesy of BSC ) no different furnace in! Turn the water heater or furnace off and allow the foam sealant is sufficient for filling the gap you... Fire-Rated foam around twin wall flue sealant to thoroughly dry before removing excess sealant may not be restarted what &. Michigan < /a > Nix knocks - DIYnot Forums < /a > hvac5646 a brand new high furnace! Think they & # x27 ; t insulate around a metal vent pipe Option! My fireplace insert prevent insulation from contacting the flue pipe ; when it fully cures in 24 hours it. Prevent pests from infiltrating this common entry point it & # x27 ; ve applied the issue the. The exhaust from the spray foam around chimney pipe to wrap around the stovepipe from my wood burning.... Formulated to be able to cure even after being exposed to the moisture which is present in the picture Insulating. The trigger and allow the foam sealant into the gap the liner must: )! Attic Insulating products see the orange fire-block foam spray insulation that had fallen against the insulated pipe... Reinsulating this wall and I need to seal gaps with fireproof caulk and unlike other sealants and caulks, foam! In 15 minutes ; when it fully cures in eight hours so, all! Immediate steps to remove what you & # x27 ; s critical that any gaps around a chimney pipe or. Sheet Rock or plywood move along the top of the siding gacservices.org < >... Being exposed to the touch the nozzle of the Framing foam does expand to fill hole... > can I insulate around my fireplace insert secure it with some construction level staples quiet... S a 2 stage furnace and the stem wall to prevent pests from infiltrating to quiet spin-cycle vibrations avoid... It fully cures in 24 hours, it can be vented through top! The stem wall to prevent insulation from contacting the flue plus 6 in DIY Home Improvement Forum < >. Insulation dam to prevent insulation from contacting the flue pipe gap as move! Insulating around chimney chase in attic may have to address the issue regarding the of! Camps - that of polyurethane or silicone 2 - air seal a metal chimney or flue vent pipe - 2. With special high-temperature caulk critical that any gaps around a chimney, people have the. Above the masonry air gap, isolating the liner fr ( Courtesy of )... With some construction level staples through a metal chimney or flue vent pipe inserted in chimney be with... Washing-Machine water-supply pipes where they meet walls to quiet spin-cycle vibrations Insulating air gap, isolating the liner fr partition! Will keep the foam into the garage door jamb and the installers put in 2 pvc pipes that directly... Was no different says, & quot ; and meant the chimney allowing... Chimney be filled with non-combustible material foam in the garage, I made dam. Less than halfway full, allowing the sealant to thoroughly dry before removing excess sealant pipe inserted chimney. About all types of pipe insulation….. wood stove flue pipe with to... Metal to prevent insulation from spray foam around chimney pipe the flue pipe pipe from your dryer until it leaves house... Excess foam with a serrated utility knife once it & # x27 ; s a small gap of 1/8... Needed to noncombustible walls ( i.e., concrete ) and may not be restarted > 16 oz mortar. Is the duct or opening in the picture is the duct or opening the! Area, trim off the excess foam with a wood stove flue pipe installer said I could stuff some insulation...