Before starting to brick up the fireplace or fitting the ventilation cowl, have the chimney swept one last time to remove as much soot as possible and dislodge any bird nests or other debris. (The flues “float” inside the brick chimney walls; that is, they’re supported by the brick but not attached to it.) The liner building must always be one step ahead the chimney building. Hi, I used a 'chimney balloon' to block the chimney just above the fireplace, a small hand pump was used to inflate it. I’ve seen plastic balloons, umbrellas and chimney ‘sheep’... or we could use an … A ventilation cowl is required to suit the chimney pot. What do you guys do to plug/block/seal the chimney during the summer? If your chimney is open at the top but is not in use, rainwater can travel all the way down to the bottom of the chimney stack. Do you have a problem readers could solve? Lay a row of bricks across the bottom of the opening without mortar leaving a gap of about 1cm between each brick and check to see if you will need to cut bricks to completely fill the opening. Been up there several years now. © Copyright 2006-2021 practicalDIY.com - All rights reserved. In truth, few chimneys built before the mid-1980s have crowns built this well. Very easy to install and can easily be removed if necessary. I’ve seen plastic balloons, umbrellas and chimney ‘sheep’ ... or we could use an old pillow, First published on Sat 3 Nov 2018 07.00 GMT. Do not take any chances when working on the roof, it may appear to be only a ‘five minute job’ but you need to gain safe access to the chimney stack and then reach the top of the chimney pot. Welcome to Chimsoc, the online home of stove and chimney products. Buy all supplies needed for building your chimney. Siting snuggly in the chimney, they provide the perfect barrier between the cold outside and the warm indoors. Whatever you do, work safe and don’t take chances. The gap between the liner and chimney must be filled with rubble so that the liner is stabilized. With a chimney, half of it is exposed to indoor temperatures and half to outdoor … A quantity of plaster will be required to cover the face of the bricks – this can only be applied once the mortar holding the bricks has gone off. Our stainless liners are backed by a lifetime warranty. Buy Land, Plant Trees . The top row of bricks will probably be the most awkward to lay – the vertical space will probably not be a full brick high; one option is to fill the gap using broken roof tiles embedded in the mortar, start at the sides applying mortar into the gap and slide the pieces of tile into the mortar sideways – pushing the pieces in from the front will tend to push the mortar out the back, pushing them in sideways will tend to push the mortar between the brick below and the chimney breast lintel above. Once the chimney is built, install sheet metal on all four sides of the 2-inch opening between the outside of the chimney and the combustible materials. If you hear the wind howl through the chimney, or get annoyed by the sound of rain beating against the metal, a fireplace might not be for you. What you do next depends on whether you block up the opening with bricks or some type of sheeting. Fair do's -that will be the neat way to do it. If you’ve spent money heating your home, then this is like letting money blow away up your chimney! Around 80 cubic metres per hour travels up the chimney. The airflow increases if it’s a higher chimney, increases more if it’s cold outside and warm inside, and increases even more if there’s a strong wind blowing across the top of the chimney. A damper rests inside of or on top of your chimney and prevents drafts from coming down the chimney. Chimney Cracks due to Chimney Movement, Tipping, Leaning . When you buy a liner from us, you are dealing with a company that knows its products inside and out. Masonry Chimney 101. A chimney is a more or less an open passageway from inside the home to the outdoors. There was a lot of this done to old houses, probably in the era when they introduced central heat, but I never hear of it anymore. These plugs easily fit inside the bottom of the flue and inflate to block any air from getting in or leaving the house. Lay the bottom row of bricks onto a bed of mortar and make sure that mortar is applied between the ends of the bricks and the sides of the opening - set the bricks back from the front edge so that they line up with the original brickwork on each side to leave enough room for the brick to be later plastered to the line of the original plaster. I’ve seen sites offering removable plastic balloons, umbrellas, felt and wool chimney “sheep”. If necessary, cut the bricks before you start. Dampers can be closed when you are not using your fireplace, to prevent air from moving in and out of your home. Unused chimneys usually aren’t ventilated properly, so moisture can easily get trapped inside with no way out. When you install a fireplace insert with a stainless steel chimney liner, you should install a block off plate. I plan to just stick the plasterboard directly onto the bricks using some grab adhesive. Install metal flashing where the chimney goes out through the walls. Made from exceptionally heat resistant insulating pumice concrete, this system can be installed inside or outside a building and can be clad in masonry or rendered to create the appearances of a traditional chimney. Matt_H likes this. Ventilation needs to be provided to the chimney space to avoid moisture collecting on the soot and smoke deposits within the chimney and forming damp areas, this can easily be achieved by building in an air-brick as the fireplace opening is bricked up. Available in two sizes it simply clamps inside the internal cheeks of the chimney pot with sprung loaded wire clamps and is fitted in seconds, it can also be used where the chimney pot is flush with the surface of the flaunching making it one of the best chimney capping solutions on the market. How to soundproof a wall. In addition to the complexities inherent in a concrete block chimney, you also need to have the experience to drop a hole down through the roof and the ceiling, which means extensive roofing and interior repairs as well as a high probability that wiring or plumbing will also have to be moved to allow chimney access. Never had a problem with it. You can follow these easy steps to block off your fireplace or even to close it up completely. Our original and best-selling product, a Chimney Sheep® chimney draught excluder ensures your home is heated efficiently by keeping heat in and cold draughts out. How to Block Off a Fireplace. A top damper sits on top of the chimney and has a … Build a clay flue liner inside the chimney block. contact. A new section of skirting board will be required to finish off the wall after the plaster has gone off. Does Soundproofing Foam work to block Noise? I'm partly concerned about air sealing the chimney to reduce my air conditioning cost and also to prevent the hot, wet outside air from getting into the chimney and condensing inside the stove pipe (which will be cold due to the interior air conditioning. What does Acoustic foam do and how does it help. Once the chimney has been swept, clear out any debris left on the ‘floor’ of the fireplace. It is also necessary to cap the chimney pot to allow air circulation through the chimney while keeping rain, birds etc out. Install chimney balloons at the throat of your chimney . A masonry chimney can be made up of a variety of materials including bricks & mortar, concrete, block, stone, flue tile, cast iron and steel. Rather than ask how to seal a fireplace and chimney, ask why NOT seal the fireplace and block a chimney? (By the way, the plastic ones are ok even outside provided it says they can be used outside - I fitted some over my old original brick vents, and they've lasted without issue.) Pillows, plugs and balloons are all names of similar devices designed to keep warm air in the home and cool air outside. Made with Herdwick wool, it reduces your heating bills, carbon footprint and wind noise down your chimney. My question is, the "box" bit that will house electrical socket and the TV accessories, can this be made with standard plasterboard ? While this will vary a bit, depending on the type … The materials needed to repair the space and match it with the rest of the room(s) will play a big role in cost, too. An alternative that’s caught our eye is … The … The airbrick needs to project forward of the rest of the brickwork so that its front face (with the holes in) is flush with the original plaster on each side – use a straightedge across the front to achieve this. Email your suggestions to firstname.lastname@example.org or write to us at Money, the Guardian, Kings Place, 90 York Way, London N1 9GU. Every week a Guardian Money reader submits a question, and it’s up to you to help him or her out – a selection of the best answers will appear in next Saturday’s paper. By teaming with some of the biggest names in the industry, are able to offer you direct access to 1000's of their products. Your may feel better if you let a professional roofer do the job even if you have to pay him. Seal the chimney with a tight-fitting screen. There is no need to remove the fireback from the fireplace, although if a back boiler is fitted, this should be removed once the plumbing has been isolated and disconnected. build the liner placing blocks one on top of the other with mortar in between. Ways to block your chimney Install dampers at the top or throat of your chimney. How to soundproof a wall (the 3 best acoustic wall solutions) 2020 . Bob Vila discusses concrete-block chimney construction with the masonry contractor on a job site in Malibu, California. Since improper installation could result in a chimney fire or chimney blockage, hire a professional service. Stoves, twin wall flue systems, vitreous stove pipe, flue liner, pipe flashings, chimney fans, and a huge range of accessory products. Work out how many bricks you require – measure the opening using metric and divide the width by 22cm to give you the number of bricks required for each row, and the height by 7.5cm to give you the numbers of rows – just multiply the two resulting numbers to find the total number of bricks required – then less one for the airbrick. Having an open chimney is like leaving a window open all the time. Use a straightedge across the front of the opening onto the original plaster or brickwork to keep the bricks straight. Shop Now. The one I used claimed that a small gap was left to allow minimal ventilation. 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. Removable chimney balloons can be installed when you are not using your chimney. You can cap your chimney or – if you use it occasionally – block the draught with an inflatable chimney balloon. But whatever method you use, the blocked opening must contain a ventilation grille, fitted at a distance of about 100mm from the floor. How to permanently block a chimney If you want to permanently block a chimney, the extreme solution would be to brick up the front of the fireplace or chimney breach, tear down the chimney top and reroof over that. Each chimney level must have six blocks. If your chimney is a "bolt-on" style chimney that is attached to the face of the house, it will cost less to remove than a chimney that is inside your home. The easiest way to cap a chimney is to fit an appropriate ventilating cowl to the top of the chimney pot. The chimney should be vented at both the top and the bottom as air is still allowed to flow through the chimney. When the brickwork is complete, “rake” out the mortar joints to give a good key for the plastering to follow. After the mortar has gone off and the brickwork is firm, carry out the plastering as detailed in our articles for ‘repairing plaster on masonry walls’ – don’t be in too much of a hurry to start plastering, if you start too soon the brickwork may not be firm enough and you could push over the wall you've built to close up the fireplace. Chimney damp will often occur if your chimney is unused and boarded up. After the plastering has been completed, you can fix a new piece of skirting across the bottom of the chimney breast – rather than just fitting a new piece across where the hearth was, it usually give a better finish if the short lengths of original skirting either side of the hearth are removed back to the corner and a new piece fitted across the complete front of the chimney breast.