How to Build Brick Chimney

In winter, there is nothing more enjoyable than enjoying a good fire around the fireplace and as I am from town and I love the warmth of the fireplace we have decided to make one in the cottage.

As the house is very small inside, the chimney we will guide it all to the outside of the house, so that the interior does not occupy anything and even in the summer-spring season, when not used can be hidden.

Well, as I mentioned both the hood and the smoke pipe I have built them from the outside. We started raising the desired measures for the chimney which at first are 80 centimeters deep by 100 centimeters but then with the inner lining of refractory bricks these measures will be reduced.

Iron rods are placed on the base where the walls will be mounted to reinforce the start, although the base is already concrete and is a stable surface.

For the first row, bricks of different sizes are used to save the unevenness of the concrete floor.

Now we have the base level and it is easier to go placing the next rows of bricks. I have used bricks 7 centimeters thick forming a double wall with a small air chamber to avoid, as much as possible, the loss of heat and since the budget I have is not very high and I cannot use special materials too expensive.

We reach the desired height with the first brick wall, then the smoke pipe will take a pyramidal shape to the headboard or chimney cap.

The first brick wall is cemented to make it stronger, faster and cover possible holes.

The air chamber remaining between the two walls can be filled with expanded clay, for example, to increase the insulation.

The opening of the chimney is proceeded from the inside, so the debris will fall directly to the base and serve as a fill to increase to reach the desired level.

The area of ​​the fireplace that houses the fire is called “home”, is one of the fundamental parts of the chimney and therefore is very important the choice of materials to be made. In this case I have chosen refractory brick. It can also be; Refractory ceramics, cast iron or steel sheet. After we have paved the rubble we have covered them with dry gravel and then we have added another layer of concrete.

The mission of the bard 1 is to prevent the direct descent of the cold air, which weighs more than the hot one and therefore goes down and could produce smoke plasters into the interior of the house, which is why the bard 2 must of being below 1 and to the same perpendicular vertically speaking so that the cold air does not go down directly. In this way the cold air, let’s say it is entertaining and leaves the warm air that is produced in the “home” that goes up through the smoke ducts. To make this design I have based on the fireplace that I have at home that has a very similar system. I will try to put a video when I turn it on for the first time to see how the fumes come out.

The interior walls are covered with refractory brick 3 centimeters thick.

Once finished outside the “home” we are preparing to build what will be the chimney which in turn does the function of the smoke ducts, since the chimney does not have any metal tube to expel the fumes.

While in the interior, we are covering and finishing the edges of the walls with refractory brick.

Also in the fire zone are placed the refractory bricks.

Top between the fire zone and the front that is slightly higher than the inside.

Before plugging the chimney with the chimney, we will put insulating material on top of the bards to better withstand the heat, then proceed to cover the cork with a good layer of plaster so that there is no danger of burning.

We go with the elaboration of the bell. At the top of the roof we have helped two rods to place the wire, which will guide us, at the appropriate distance, that is, in order to leave, in this case, a smoke outlet of 30×30 centimeters more or less.

In the image you can get to appreciate the wires as they will help to form the bell in pyramidal form.

While the inside is already practically finished.

When it is completely in line with the wall, the chimney is a bit bland, as it does not have the typical wood over it nor some pillars on the sides. So we decided to decorate it a bit by placing a cement frame around it.

The desired contour is marked with a pencil and then the paint is bitten so that the cement grabs the wall.

It is filled with cement (a thickness of about 2 centimeters) around the contour, or to the eye, or we can help with slats of the desired thickness as a guide.

In the image you can see the thickness of the layer of cement applied to make the frame of the chimney.

If you do not like it to be just a straight line frame, you can help with some tool such as a knife, spoon, etc. to mold the cement.

In this case I carry a tool that is used in the plaster.

You have to work the cement when it is firm but before it completely shrinks.

This is the way more or less, failing to clean the remains of cement and re-paint the parts that previously had cement.

While, on the outside, we continue with the construction of the bell and placing the bricks with the proper inclination marked by the wires and the wall guides.

As I go up the rows of brick I am wearing plaster on the inside of the bell. Gypsum withstands heat better than cement.

I had to break part of the roof to continue with the chimney. Normally it is recommended that the chimney overhang the roof, as long as they are reasonable measures.

We have finished with the bell, it is time to start with the cap, cap or headboard, whose purpose is to facilitate the exit of fumes and prevent rainwater from entering. I have cut 110mm diameter pvc tubes and filled them with concrete to be used as pillars of this mini-roof. As a base I have used two pieces of porcelain left over from a friend.

Slopes are formed to place the slanted tile with a blown brick to prevent water from soaking the walls of the headboard.

The tiles are distributed and placed seated in cement they do not move .

This is the finished interior and a side view of the fireplace in which you can appreciate that it does not occupy space inside the dwelling.

Here are the photos of the bards from within. One of the bards is superimposed on the bards that start from the fire zone, maintaining a hole 10cm high by 90cm long for the smoke to rise upwards.