sealing an unused chimney

Waterproofing and sealing a chimney can be vital to its structural integrity. The cap must be durable enough to keep these nuisances out. You should cap any unused chimneys with a flue ventilator. This requires taking a completely different approach. Also, the sealing damper keeps out moisture from your chimney. There are two main reasons why you should seal the chimney. A retired chimney should be sealed only at the top or bottom. A moderately skilled homeowner may be able to tackle the exterior repairs, as long as proper safety precautions are taken. Trim and drywall are added next followed by painting. The procedures involved can be overwhelming for some people. Chimneys made of stucco plaster, stone, and concrete also require sealing. There are multiple top-sealing damper sizes to choose from. You may be able to buy a pre-made cap at a heating supply retailer if you have a standard size clay liner that protrudes above the top of the chimney. That may be necessary if it becomes damaged or access to the inside of the chimney for future repairs is required. Basically in our living room we have a working inglenook fireplace.... Sealing a chimney and fitting extractor fan. by adminchi | Feb 2, 2018 | Blog | 0 comments. Both of these objectives can be achieved with the same modifications, but will require more than one component. Question: I'm looking for advice on how to cap off an unused chimney. This can either be done permanently or partially depending on what works for you. Preventing this will be of primary importance, but cold air intrusion from the top of the chimney must also be eliminated. One of the most significant reasons for having an unused chimney and fireplace sealed is the improvement of air quality. Saving a big money on the heating bills by sealing them off when not in use is possible from masonry fireplaces in the house. There are so many different options nowadays to cap off an unused chimney. In some cases, it may involve capping a chimney off. How to permanently block a chimney As long as you measure your chimney dimensions correctly, the installation should be easy. Hi, We have exposed an old chimney in our Victorian terrace house. In that situation repairs can be done fairly quickly while supplies are temporarily stored on the roof adjacent to the chimney. Some of the value for sealing a chimney and fireplace is because it is unused, is retired, or gone out of service, being a huge source of energy loss and also being valuable despite being out of service. 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. I have caps on both. Whatever the reasons may be, sealing a chimney and fireplace the right way is more important. For some, a permanent block will be in order. Additional reasons include the extra work needed to keep a fireplace functional, being unable to use it, won’t depreciate the value of the property and the need for better indoor air quality. In most cases, the need to seal a chimney will be due to it being underutilized or completely unused. But it is important to maintain a flow of air through a redundant flue to prevent dampness problems in the chimney … If you want an easy way to temporarily block and unused fireplace flue to stop a draft, you should consider installing a top sealing damper. When this is done, the air is still able to pass through the chimney. If not, one can be fashioned from sheet metal using standard tools such as tin snips and pliers. You’ll need to get a trained professional who has experience in this area. Viewed 3k times 2. Being unable to use a chimney may be due to multiple reasons. The following information should help you comprehend better; This is also known as the chimney balloon and serves as a plug that fits into the chimney bottom. Unused, though, they can waste a lot of heat up the chimney. Such reasons may differ from one person to the other. Usually unused chimneys are capped off with a bent sheet metal covering and perhaps a wire strap or weight on the top. Despite briefly explaining the process involved in permanently sealing an unused chimney and fireplace, you don’t need to be worried about every detail involved. Active 1 year, 3 months ago. What energy? Moreover, it is also possible to use decorative items such as sculptors, candles, or figurines will cover your unused chimney just fine. The expanding foam found at home centres or hardware stores in small aerosol cans should be sufficient for this purpose. Sealing an unused chimney and fireplace is necessary as it helps keep it safe. Hi, we've recently bought a very old house (listed building). 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. The easiest way to seal off your fireplace is with a Chimney Balloon Inflatable Fireplace Plug. It doesn’t matter the size of your chimney crown. When a chimney and fireplace is out of service or retired, it will need to be sealed off. Such modifications may have to do with the creation of storage space. Put a ventilated rain cowl/cap on the chimney pots. However, such a delicate task shouldn’t be performed by you especially when you have little experience or know-how about the task at hand. If your damper is near the firebox, you can use insulation to seal the chimney. As with many home-related modifications, common sense should dictate the methods employed in sealing your redundant chimney. In certain situations, there are no plans for future use of the chimney or fireplace. The key to capping the top of the chimney is to install a barrier that will be moisture and tamper resistant and will not be affected by environmental factors such as snow, wind and sunlight. Seal Unused Chimney Flue Top, Air Leaks, Heat Loss, Damp, Water Entry ... Sealing a Chimney - DIY - Air Tight removable seal - Duration: 2:39. These caps can be easily found and should be secured only with short sheet metal screws, to allow for future removal. Who you call for the job determines how well your unused chimney and fireplace is sealed or blocked. If you want to seal your fireplace off for good, the easiest way to do so in a hurry is to cut out a foam insulation plug, place it at the bottom of your chimney, and caulk or weatherstrip it in place. This is followed by the cementing of masonry using special bricks known as air-flow bricks to aid with ventilation. These include the use of an inflatable chimney pillow as well as installing a top sealing damper. Closing Off An Unused Or Abandoned Thimble Port. Using removable fasteners -- such as special galvanized or stainless steel screws -- will ensure the cap can be removed in the future. You can use a precast concrete cap that has a drip edge and then apply a sili… Locate the chase cap of the fireplace, which is the pipe that lets out its smoke. Oct 30, 2014 - How to Close an Unused Chimney. This procedure is something you can do yourself as a homeowner. ©2015 Winnipeg Free Press. This is one of the primary reasons for having a chimney and fireplace sealed. The flue ventilator stops rain entry to the chimney but still allows a small amount of … Air leakage may occur from warm house air leaking into the bottom of the chimney, rising inside due to the stack effect. It is assumed that you do not have plans of renovating or remodeling your chimney in the nearest future. All you need to do is call in the experts. This cap should be large enough to fit easily over the top of the clay flue, but not too large that significant gaps appear between the sides and the clay liner. 2015-08-29. Chimneys designed to use wood as fuel can no longer be used. A: Unused flues should be capped at the top, to minimise rainwater ingress. Even new cast-iron dampers allow air loss. Make sure that it is clear of any extraneous debris. The furnace is in the basement, and on the main floor there was a thimble extending out on each side of the chimney. Questions can be emailed to the address below. As people spend more of their time indoors, it becomes necessary to ensure that there’s enough supply of fresh air in the home. That is because a chimney needs some ventilation. 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. Understanding these two terms is necessary for deciding on the appropriate actions and calculating costs. Step #1: Find the Leak. You’ll find the perfect fit for your chimney. Before deciding on whether your chimney needs to be sealed temporarily or permanently, there have to be real reasons. Once cut and bent to fit, this cap may be secured with a combination of fasteners and sealant to prevent movement and leakage. Now plug the bottom of the flue with a chimney balloon or similar, DraughtBusters recommend using an old pillow in a couple of black sacks, and removing it again in the summer. The need for waterproofing applies to brick chimneys in particular. I will try to highlight the key considerations when doing this task, whether by yourself or with professional help. If your home is a two storey or higher, professional help likely will be required. This serves to keep both debris and moisture out of your flue. This will allow air to pass through the chimney and help prevent problems caused by moisture. If you're not going to use your fireplace again, or will not use it … Any of these methods will serve your needs. Unused chimneys not only waste a lot of heat, they also pose a potential damp problem as well as being a cause of smoking fireplaces and stoves. Now, ventilation is necessary to allow for moisture escape. According to VA chimney experts there is no code stating how I have to seal the thimble. Capping unused chimneys - flue ventilators UK Unused chimneys not only waste a lot of heat, they also pose a potential damp problem as well as being a cause of smoking fireplaces and stoves. For a more lasting seal, check out this DIY article on how to permanently seal an unused fireplace. Last Edited By Krjb Donovan. The chimney is brick with two clay tile liners running through it. If you continue to use this site we will assume that you are happy with it. Repeated applications -- with time to cure in between -- may be required to get a thick enough layer to fill all gaps above and below the insulation plugs. Just mentioning these chimney sealing methods won’t be enough without providing some form of information. Certain fireplaces are pieces of art. For that reason, installing a galvanized or painted-steel chimney cap is the most common option. When the experts come around, questions are asked, an inspection is carried out and the most appropriate action is taken based on your needs and the situation at hand. I have also had some condensation enter the basement by way of the clean-out. One of the best ways (in my opinion) is to use a Chimney C Cap Chimney C Caps are a plastic terracotta cap with an bird/insect guard that sits in side the cap. Ari can be reached at 204-291-5358 or check out his website at trainedeye.ca. When sealing up an unused chimney doesn’t depreciate its value significantly, it becomes increasingly appealing. Cooled or heated air from inside your home can escape through the chimney, causing your HVAC system to work harder. The bottom is even easier. This significantly increases the appeal of the fireplace. Step 2 – Purchase Your Flue Sealer or Flue Sealing Materials. All Rights Reserved. Installing a metal cap on the top of the chimney will solve the pest, debris and rain concern, but some air leakage may still be possible due to the imperfect fit. How to temporarily block a chimney. You can also seal the edges with foam weatherstripping tape, too. Many masonry contractors or chimney experts already have their own scaffolding and safety equipment to minimize these costs. There are different approaches to doing this. It is common for an unused chimney to be reused later on. When a chimney isn’t operable any longer, it can be sealed from the top while leaving the fireplace to add to the beauty of your home. Sealing and insulating the clay flue at the top and bottom of the stack will ensure the job will yield these desired results. It will need some ventilation. If you could provide a link to VA code that says otherwise I'd be appreciative. Second, the sealant works as a waterproofing agent and prevents leaks. That way, the structure remains and gets sufficient ventilation while adding to your home’s feel and look. Flue ventilators can be found on our chimney pot page. Plus, you can even decide to have it removed altogether. The fireplace flue can be a major source of energy loss. For these unused chimneys, it’s better to have them sealed up at least until you’re able to come up with modifications for alternative fuel use. Chimney off to choose from exhaust chimney on Heating Bills by sealing them off when not use. Masonry contractors or chimney seen that this process is either temporary or permanent attempting this.... 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