Majority of us do not feel the necessity to know the constituent parts of the apparatuses we commonly use. But in practical terms, it is actually sensible to keep track of the vital framework, just in case it gives trouble or demands care. A liner is one functional unit of a customarily built chimney. The fundamental responsibilities of a chimney liner are to vent the combustion gases out of the chimney and protect the masonry constructed chimney walls from degrading combustion byproducts.
Indifferent to its utility, many homes built in first half of the nineteenth century lacked the presence of a liner. Even now, in the homes having a liner, people neglect the need to sanitize or repair a liner when required. The urgency to clean a chimney liner can be dallied in case your fireplace is backed by gas or oil, but if the energy source is wood or coal then yearly cleaning of liner is mandatory.
To apprehend the functionality of a chimney liner, it is better to recognize its availability and the disparity among them. Liners are broadly of three types.
Liner Composed of Clay Tiles
- Clay tiles used for building flue liner are comparatively inexpensive and capable of lasting for about 50 years.
- Moreover, the tiles are resistant to high temperature and the corrosive by-products produced during the combustion of fuels.
- But installing and repairing clay tiles are extremely tedious processes.
- The clay tiles need to be cut inch-perfect to fit within the realm of the flue and for replacing the damaged clay tiles, the old ones need to be chipped-off and broken from the accessible open-top.
Tubular Metallic Liners
- Flue liners made of metal are induced in chimneys which are straight and not crooked or bent.
- With the threat of getting tarnished, you need to pick the right alloy. Stainless steel liner with perfect round tubular shape is resistant to water and creosote.
- Compared to traditional liners, it is easier to install and cheaper.
- If desired you can mount insulation around metal chimney liner for lower consumption of fuel and reduced downdraft of cold air, when your fireplace is inactive.
Cast-in-place Liner in the Form of Flue
- To fix a poorly shaped chimney, liner is placed within the flue-space.
- It aids in providing strength. Just like clay tiles it is resilient to the abundance of heat generated as the fuel burns.
- The liner cast has insulation property for which there will be less consumption of fuel and formation of creosotes.
- Though less troublesome than clay tiles, even this construction is bothersome. Mortar mix is applied around an inflated bladder or round vibrating bell, where either one is pulled-out, keeping the mortar intact.You can opt for any variant of chimney liner as suggested by chimney professionals or based on your individual conception of necessity and budget. Irrespective of the type it is important to clean chimney liner so that it continues to protect the chimney from hazardous consequences.
Why You Need to Keep Liners in Good Health
- Drafting of flue hot gases and outside ambient air takes place within the flue liner. A well-conditioned liner will improve draft and allow better combustion of fuels.
- It contains all the combustion by-products and vents them up and out through the flue opening.
- It is a protective lining between the masonry built chimney materials and erosive flue gases, soot, water and creosote.
- Unmaintained liners will allow the passage of these by-products to the bricks and mortar mix.
- Acidic flue gases, creosote and water will damage the basic building composition of chimney walls. They become susceptible to fire when they making them split and wear away.You can clean and get rid of liner disposables yourself. But chimney cleaner personnel are trained to take care of challenging situations with appropriate tools. Moreover, if required they will suggest the required repairing as per modern safety standards. Another related instance to be noted is that while hardwood produces less heat, softwood creates more creosote. By choosing right fuel you can right away check the production of harmful combustion end-products.