This article offers a variety of methods for sealing your fireplace, as well as seven bonus tips about reducing fireplace draftiness. Spray Foam insulation. 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. minnow from Seattle on September 30, 2010: great hub! I think what you describe would actually lead to a colder bedroom wall. John enjoys home improvement projects that improve the quality of home living. The most important part though is to stop the air flow, so again, what you mention would work, but always make sure to create a good air seal. When it's time to use the chimney again, all you have to do is deflate the plug and pull it out. Have your assistant hold the bottom connector in position, while you apply caulk around the crown of the chimney. Near the top of the chimney, the pressure is higher, near the bottom it is lower, and in between is the "neutral" zone. Choose carefully between Polyisocyanurate, EPS & XPS or Mineral Wool & Hemp as the wrong choice can reduce insulati…, Crawlspaces are becoming rare for new home construction in USA & Canada. Joined: 15 Mar 2008 Messages: 2 Thanks Received: 0 Location: North Dakota Country: Hello Xerxes, thank you for your reply. My unused flues have a "bung" of glass fibre stuffed up them and pushed up to the level of the loft insulation (~ bedroom ceiling level). I would place this over the fire retardant fireplace cover that I already have. How to Close an Unused Chimney. The technician that fitted the electric boiler cut back the flue the the ceiling, filled part of the flue with insulation, and then applied cement to the underside to seal it. What's the best way to insulate an unused fireplace and chimney? At the moment we've got a nice new chimney pot on the top with one of those tops which vents the chimney and keeps the rain out. I really don’t understand why the issue of heat loss up chimneys is not more high profile. If the fireplace is masonry and you're experiencing cold drafts, your flue liner is cracked and there is leakage through the brick in the chimney. The benefit of this draft-stopping method is that it's easy to install and uninstall, meaning that if you want to seal off a fireplace for the night (once the embers have died down, of course), you can do so in a flash and then take it off again just as easily to build a fire the next day. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters. You closed all windows and doors to make the system work better and save energy. You should see black text on a white background. Insulate your chimney. The rain cannot get in, but it is not sealed air tight, which does allow any inside moisture to slowly get out. It's hot outside and you turn on your air conditioner. Home / Blog / Chimney Insulation. Dec 17, 2014 - Explore Tamara Verushka's board "Fireplace draft stopper" on Pinterest. Just make sure to remove anything you put in the chimney hole before starting any fires. Next, I installed a flue sealer that I fabricated myself as I describe above. Cover the entire stack of bricks with a layer of rigid insulation (rockwool or expanded polystyrene) and half inch-thick plywood, which can then be covered to match the rest of the house. Fit the cap over the top of the place, and clamp into position. Sealing up an unused brick fireplace chimney will save money on your heating bills and increase your comfort level at home.In addition to letting in cold, these chimneys pull hot air out of the house. Understanding these two terms is necessary for deciding on the appropriate actions and calculating costs. Fortunes are spent on loft and cavity wall insulation, double glazing and exterior cladding. xerxes, 15 Mar 2008 #2. Fiberglass will not burn, but it may melt if temperatures exceed 212 degrees Fahrenheit. According to the U.S. Department of Energy, by sealing and weatherstripping fireplaces, a typical homeowner can reduce air leaks by up to 14% and save as much as $275 a year. One of the best ways (in my opinion) is to use a Chimney C Cap. Filling the chimney with insulation should better address the cold wall of that bedroom. I need a bit of advice re the ventilation of unused chimneys. Contrary to pre-fab fireplaces and chimney systems, masonry fireplaces are built on-site and are part of a home's structural design. Last year we had our soild fuel boiler replaced by an electric boiler. Sealing and insulating the clay flue at the top and bottom of the stack will ensure the job will yield these desired results. Whether to insulate it on a permanent or temporary basis. No need to have airflow through an unused chimney. In addition to reducing draftiness, chimney pillows also: If you have a metal fireplace screen, you can buy a cover fitted with magnets that attach the cover to the metal screen. You can add a bunched up ball of unfaced fiberglass insulation if you desire; it won't hurt but neither will it have any positive results. We have a gas fireplace that is rarely used and a standard chimney flue system on a house built in 1997. The bottom ends are not sealed. Note: If you do not have a metal screen, you will have to improvise. I never thought of sealing off our fireplace but I'll look into it for this winter, how to permanently seal an unused fireplace. Vermiculite or Micafill: I … Ultimately, nobody can deny the importance of proper chimney insulation. 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. Insulating unused chimney (10 Posts) Add message | Report. If your damper is near the firebox, you can use insulation to seal the chimney. When it comes to the former, do use an inflatable plug, which in this case is done internally on the flue. Yet having an open flue is like leaving a window open all the time. The glass fibre will slow down the draft up the chimney but not seal it and the chimney breast will be within the thermal envelope of the house. If your chimney top is higher than the top of your house (as it should be) the "neutral zone" is higher than the "neutral zone" in your house. When installing a new liner for your heating appliance — whether it is a furnace, hot water heater, wood-burning insert or stove, or existing fireplace — consider insulating the liner. We have a chimney in our living room that seems to be completely open (you can feel a massive draught when you stick your hand up there and the wind is making quite a noise blowing over the top of the chimney). This way, hot air is blown back into the room rather than left to escape up the chimney. As I stated in my first post vermiculite chips are the preferred method of insulating voids in & around flues - and serve a double purpose - as they poured into the chimney (a special funnel can be purchased or made) & tamped down firm. Chimney Insulation. One of the best ways (in my opinion) is to use a Chimney C Cap. Is that safe? I turned the gas valve off and stuffed styrofoam up the chimney. Vermiculite or Micafill: I have my reservations about these methods. When you go to bed at night, you should leave the damper open if there are embers remaining from the fire. Battic Door is the US distributor of the fireplace plug. We have a gas fireplace that is rarely used and a standard chimney flue system on a house built in 1997. Chimney C Caps are a plastic terracotta cap with an bird/insect guard that sits in side the cap. SolidWallJim. Save energy by sealing off an unused fireplace with insulation. Sealing and insulating the clay flue at the top and bottom of the stack will ensure the job will yield these desired results. Newspaper insulation. Air from your room, already heated at some expense, is lost up the chimney in the draft. To do so, you simply have to remove the insulation plugs and have a new chimney stack inserted inside the brick fireplace. You’ll then be in a position to begin tackling the problem. 5. Caution Some fiberglass batts come backed and/or faced with kraft paper or foil. One study estimates that as many as 80% of American households inadvertently leave their flue damper open after the fire dies down. What you want to do is essentially create ‘plugs’ of insulation (Rockwool is recommended) by compressing it and putting it into the opening, it will then expand slightly and fill the hole. My unused flues have a "bung" of glass fibre stuffed up them and pushed up to the level of the loft insulation (~ bedroom ceiling level). I need a bit of advice re the ventilation of unused chimneys. Whether to insulate it on a permanent or temporary basis. You should then secure th… Answer: You can purchase one the available metal fireplace closers that are on the market. If your damper is near the firebox, you can use insulation to seal the chimney. At the bottom, cut a hole into the insulation where the fireplace snout will connect to the rest of the fireplace, and secure this snout using a metal band. Discussion in 'Building' started by overlandrover, 14 Apr 2007. overlandrover. Fireplaces are huge energy wasters when used incorrectly. In the right hands, the treatment of chimney damp is quick and easy. Imagine leaving a window open all winter long -- the heat loss, cold drafts and wasted energy! Keep the warmth in your home with a Chimney Sheep draught excluder. Cut out the pattern and put it in place to see if it fits. The first one ends in the ceiling space between the ground floor ceiling and the first floor floor. Asked by Jim Simmons. There are so many different options nowadays to cap off an unused chimney. Job Done. Now use the rectangular select tool and select the text you just created. In the heating season, with the flue damper closed, some of your valuable heated air is escaping up the chimney. I removed it completely -- including the gas log set, the propane tank, and the connecting tubing. Using a long stick a pushed the first one about 4 m ( 12 ft) down the chimney. Creosote buildup in your chimney can drastically reduce the efficiency of your fireplace. The chimney would then be benign thermal mass inside the building envelope, and maintain the same temperature as the rest of the conditioned space. Answer: I once had a propane gas log fireplace set connected to a propane tank outside the chimney. Apart from a chimney balloon, There are also woolen chimney insulators known as “chimney sheeps.” You can also try old pillows and stuff them in the chimney hole. To stop your chimney from being a major source of heat loss you need to insulate inside the chimney from the top and bottom, in addition to insulating the exterior. 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. Sorry for the inconvenience. I’ve seen plastic balloons, umbrellas and chimney ‘sheep’ ... or we could use an old pillow Sat 3 Nov 2018 05.27 EDT First published on Sat 3 Nov 2018 03.00 EDT Share on Facebook The next time you want to use your fireplace, simply deflate and remove the pillow. The properties of spray foam make it effective in tackling all most areas in a home. I would place this over the fire retardant fireplace cover that I already have. That is where your damper seal will be installed. Spray foam insulation can be used under the roof and floor, or between the walls with ease. Then right-click inside the select box. This is ugly, of course, but I … reduce the amount of other debris that might fall into your chimney. Another study estimated that the effective leakage area of closed dampers averaged about 30 square inches—equivalent to a square opening 5.5" x 5.5" in size allow continual flow of heated air to the outside. Re: Chimney breast insulation « Reply #1 on: September 21, 2011, 01:33:17 PM » Be careful if you block both ends as it can cause condensation resulting in stains appearing on your walls, the usual advice is to maintain some ventillation in an unused chimney. There's no need to fit this particular type. Learn how to stop cold air from coming down the chimney. This will allow air to pass through the chimney and help prevent problems caused by moisture. Measure each side of the opening just below the damper seal and transfer the measurements to a pattern drawn on cardboard. However, it is often not difficult to insulate a liner (just adds cost) so it is up to you. Learn how to seal your fireplace and save your hard-earned money! After capping the chimney top, the next step is to look for a way of insulating its bottom. I have an unused fireplace that feeds a lot of cold into the house so I would like to insulate and shut it. I really don’t understand why the issue of heat loss up chimneys is not more high profile. Fortunes are spent on loft and cavity wall insulation, double glazing and exterior cladding. There are ways of extracting more heat from the flue when using a brick chimney but they do involve making absolutely sure the steel flue is gas tight and secure and it does need Rockwool insulation around the flue in that portion above the house walls and knocking out bricks on the inside. 5. Fiberglass insulation is naturally fire-resistant. This of course would need to be done by certified professionals, and only if the existing chimney is structurally solid. So a lot depends on how your chimney is set-up. When it comes to the former, do use an inflatable plug, which in this case is done internally on the flue. By installing batt insulation in the chimney and not using spray foam, it is easily disassembled if needed so you may be able to use the existing chimney for a wood stove or a gas or wood fireplace insert in the future if you so desire. Make any adjustments to your measurements so that it fits tightly in place. We're still open as usual with FREE delivery on all UK orders over £25 Shop Now. The main reason we propose exterior insulation would be to create an envelope around the chimney to eliminate any thermal bridging. Free postage. Asked by Jim Simmons. Your fireplace chimney works the same way. Answer this question. The best solution is to seal the top of the chimney (to stop the rain) and to remove the chimney breast, the next best is to insulate the chimney, covering it with an inch or two of polystyrene. Click on that and the text will change to white on a black background. Spray Foam insulation Instead of insulating the exterior of the brick chimney, we were actually advised to fill the interior cavity with loose fill insulation. Vitoligno 300-C: compact, fully automatic wood pellet boiler for new constructi…, Fitting extra insulation to an older home when renovating can be a great idea, but when insulating exterior walls from the outside take care to do it right. FAST & FREE. The air between the liner and the chimney wall will insulate the liner (air is a good insulator) although the liner obviously touches a cold wall in many places. Do this from the top and then cover the opening with galvanized sheet metal to prevent water from infiltrating. A hit-and-miss ventilator has a sliding plate which allows you to close it if you want to for any reason. I would probably frame around the existing fireplace in a manner that would allow a … This one from Amazon features a fire-resistant (not fireproof) Pavenex fabric cover. Install a heat-exchange system. Does an Unused Chimney Need Ventilation? As such, it can be used to insulate a chimney. This is to protect you from deadly carbon monoxide. Capping an unused chimney/flue. The chimney breast is both the most visible and vital portions of a chimney. My question concerns the now unused chimney, which has been dripping condensation into my basement all winter. Holes hidden in attics, basements, and crawlspaces are much harder to locate and usually cause bigger problems. Replace the damper. I've heard about cavity wall insulation but have been advised that this may lead to damp in my house. Save energy by sealing off an unused fireplace with insulation. A NOTE ON SEALING OFF THE CHIMNEY WITHOUT VENTILATION: If you just cap off the top and insulate the bottom, “pumping” will happen. Submitted by Harold Remlinge... on Tue, 01/11/2011 - 18:45. Reduce energy bills and keep the heat in by blocking your unused chimneys. EarSlaps Tue 17-Nov-15 18:59:50. Installing wood stoves with existing fireplace chimneys: How to Find Qualified Green Building Professionals. Plug the bottom opening with insulation as well, then seal it to prevent air leakage. Usually unused chimneys are capped off with a bent sheet metal covering and perhaps a wire strap or weight on the top. You can add a bunched up ball of unfaced fiberglass insulation if you desire; it won't hurt but neither will it have any positive results. How To Reduce Your Energy Bills / Energy Conservation Begins at Home. We like to use the fire every now and then, but most of the time all the warm air escapes up it. For a more lasting seal, check out this DIY article on how to permanently seal an unused fireplace. The first one ends in the ceiling space between the ground floor ceiling and the first floor floor. And it's fairly easy to uninstall. The reason for this is the "chimney" or "stack" effect. Having an insulated chimney plays an important role in any chimney construction or modification. Sealing up an unused brick fireplace chimney will save money on your heating bills and increase your comfort level at home.In addition to letting in … Get the Chimney Bottom Insulated. Posted on 25th November 2012 by Sally Phillips. Ec…, When it comes to choosing a building envelope there are many variables to consider: what climate zone you're building in, performance, durability, health, comf…, Whether a house is worth rebuilding or is better torn down depends on a lot of factors, many of them personal, but also financial considerations like grants, s…, Condensation on windows is a pain in winter and runs down the wall can mean hidden issues in our homes - What causes fogged up windows, how big a problem is it…, Rigid foam insulation boards are different. The vermiculite will then absorb the moisture, and when you heat up your metal flue, steam may start burping vermiculite out of the top of your chimney (I've read of this, though don't know if it's true). If your home has a folding attic stair, a whole house fan or AC Return, a fireplace or a clothes dryer, that may be just what is occurring in your home every day. There are so many different options nowadays to cap off an unused chimney. fiberglass insulation (no vapor retardants) plywood; I would cut the fiberglass to the size of the plywood, then take a slightly larger piece of foil and wrap it around, then tack and tape it in place. Now think about the cooling season. 37 sold. Insulating your whole house professionally can seem expensive to some. These often overlooked sources of energy loss and air leakage can cause heat and AC to pour out and the outside air to rush in -- costing you higher energy bills. I stuffed some batting from insulation up into the fireplace as we don't use it..also installed glass doors. Drafty Fireplace. A contracter has advised us to have the two unused bedroom chimneys piped together via an inverted "Y" … Finally, use the paint can tool, select black, and the rest of the background will change to black. True, not insulating the exterior keeps the aesthetic the same, however, depending on how the chimney integrates with the wall of the house, I would be concerned that the stone or brick would still act as a thermal bridge. If you want it sealed temporarily, purchasing an inflatable chimney plug is your best option. Draught Exclusion & Insulation. However, it is often not difficult to insulate a liner (just adds cost) so it is up to you. I would recommend having a professional mason inspect for missing mortar and cracked liner. Frank . 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