What bricks are best for a chimney?
Choosing the right bricks is important for a chimney to last long and trouble-free. Often, those who attempt to repair or build a chimney will choose the wrong material on their own and then bite their elbows.
Bricks are different in their application and the use of only fire-resistant bricks may not always be justified. Ordinary solid clay chimney brick, which is laid inside the house, through floors and attics, should not be used for a rooftop chimney.
Chimney bricks should be placed outside, they are designed specifically for over roof chimneys — they have a different freeze cycle, they can withstand both temperature changes and humidity and precipitation, as they are designed for outdoor use, in snow and rain, and are able to serve in such conditions for many years.
If you buy chimney bricks and build everything with them, there is a good chance that part of the chimney may crumble on the outside.
Which pipe in the chimney is best to choose?
If the brick chimney is in good condition on the outside, the pipe can be placed in the chimney, choosing between stainless steel (metal) or ceramic lining. Does the cladding material matter, given the type of heating in the house? Yes, if gas is used to heat the house, a metal pipe is enough, because there is no soot.
Even when heating with special pellets that produce little soot, you can choose a metal chimney. If the house has wood heating, briquettes, then because of soot, a ceramic chimney pipe is the best choice.
Metal pipe costs less than ceramic pipe — which is almost twice as expensive. The price is usually calculated per meter — a ceramic pipe and its installation cost about 3-4 thousand rubles per meter, metal chimneys — about 1.5-2.5 thousand rubles. per metre.
Although ceramic chimneys are more expensive, they are also more durable and resistant to burning through — if soot ignites in ceramic, the result will not be as sad as in metal, and ceramic will last 50 years or more.
What are ceramic chimneys and which one is better to choose?
In new buildings, ceramic chimneys lined with expanded clay concrete are increasingly being used. It can be left as is — gray, it can be plastered or lined with brick, you can make a metal coating.
What is the difference between a ceramic chimney and a brick? Brick chimneys have been used for hundreds of years, usually covered by a wood-burning stove, stove, or tiled stove. They are well heated both from them and with the heat in the house, because the temperature of the flue gases coming out of them is relatively high: 150-250 degrees.
Times are changing, now we live low energy and save fuel and we blow low temperature smoke down the chimney. Modern heating appliances — fireplaces, stoves, gas, pellet boilers — have a very low flue gas temperature.
We return all the energy to the radiators and the house to keep it out through the chimney. As a result, flue gases condense — in the presence of an empty brick, moisture and condensate seep into the brick and damage the chimney.
In contrast, ceramics with a glass glaze on the inside are not affected by moisture. Therefore, if the house has an old wood burning stove, a brick chimney is quite good, but if there is a more modern type of heating, a ceramic chimney will be a better choice.