When building a house, many mistakenly believe that the chimney on the roof is very simple.
Pipe outlet through the roof
To begin with, it should be noted that you need to think about the pipe in advance. Arranging a stove or fireplace, the first thing to think about is not how it will fit into the interior, but how it can be connected with the outside world.
It is necessary to build a furnace in a place where the foundation is very strong, it is also very important that there are not many beams and rafters or other communications and impenetrable obstacles above the furnace.
To your attention! One of the main conditions for the proper functioning of the pipe is its length and straightness.In this case, better traction will be provided, however, in this case, a decrease in useful productivity will occur, which involves additional calculations, by bringing the chimney through the roof.
The wind is responsible for the draft, which blows the pipe. If the wind blows the pipe well, then the draft will be easier to create, so it will be better if the pipe outlet through the roof is on the ridge or not far from it.
It often happens that this is not possible, then they resort to another method. In order to determine the proper height of the chimney in relation to the ridge, a downward angle is built horizontally, which will be equal to 10 degrees.
It is advisable to make sure that the pipe ends in this line, and it is better that it be 30-50 cm higher.
Advice! Before installing a pipe on the roof, it must be taken into account that the pipe can cause cooling of furnace gases. This can cause condensation to soak into or flow down the pipe, causing an unpleasant odor.
In order to prevent this, it is necessary that the outgoing gases have a temperature of 150 degrees. In order to achieve this, it is necessary that the pipe be made of a material that will warm up quickly, while at the same time the pipe must be insulated along its entire length.
You can insulate the pipe with basalt wool and a casing made of galvanized iron. It is necessary to maintain a certain temperature in the pipe so that you do not have to spend fuel energy on the temperature in the pipe, and not on heating the room.
Bringing out the pipe
But the most important question for us is how to get the pipe through the roof?
Faced with the ceiling and the roof, the owner of the stove and pipe has two tasks:
- Make protection so that moisture and wind do not get into the interior through the holes made for the pipe, or simply arrange good waterproofing. Otherwise, the question of how to install a pipe on the roof of the bath will become secondary after the question of how not to wet your head with melt water or snow.
- Make the pipe exit through gable roof fireproof.
Bringing the pipe to the ridge, the undoubted advantage is that the junction is very easy to perform.
The fact is that snow does not collect on it, which means that the likelihood of leaks is reduced.
Of course, you will have to make a truss structure in which there will be no load-bearing ridge beam, or it will be interrupted where the “pipe-roof” structure will be, which will require the installation of additional supports designed for rafters, which is not always convenient, especially for a mansard-type roof .
Therefore, the exit of the pipe through the roof can be arranged near the ridge. In this case, there is also no snow bag, and the junction is made without much effort.
It should also be remembered that it is impossible to arrange a chimney in that place on the roof where two slopes converge at an internal angle, for example, in a valley. In this case, autumn is difficult to achieve a high-quality connection between the pipe and the roof.
In any case, rainwater will fall into the hollow, and in winter a large amount of snow will accumulate in it, which will cause constant leaks.
Your attention! You also need to consider that the distance between the roof and the rafters should be at least 25-30 cm.
In case if double pitched roof made of combustible material, then it is necessary to make a fire gap of the order of 13 - 25 cm. If non-combustible material was used for the roof, then a gap of several centimeters will suffice.
The only thing is that the pipe must be removed from the crate.
The most difficult thing in the “roof-pipe” scheme occurs if the roof is made in the form of a roofing pie, that is, the layer contains vapor and waterproofing, which includes a layer of insulation.
In order to ensure reliable protection of the insulation layer from moisture and water vapor, it is necessary that the hydro- and vapor barrier be continuous. At the same time, they are combustible, which requires a gap.
What to do?
The best option would be to separate the area adjacent to the chimney from the roof and make something similar to a separate box. You can make a box from beams and wooden rafters.
The box should be located at a distance of 13-15 cm from the pipe, and this gap is filled with non-combustible heat-insulating material, for example, stone wool.
Stone wool is good because it is not afraid of moisture, unlike other heat-insulating materials. In other matters, choosing this material, you can not do steam and waterproofing.
As for the steam and waterproofing of the roofing cake, it is carried out in traditional ways, which are used for such obstacles.
The film web is incised with an envelope, which is brought to the edge of the transverse beams and rafters. After that, they are fixed with nails or staples, the waterproofing is pressed against the crate with bars, and the vapor barrier is pressed with a frame base.
In order to provide maximum protection against moisture at the joints of the chimney box with films, it can be sealed with special adhesives or tapes.
In cases where the pipe on the roof is long, it is surrounded by a layer of insulation, the material from which the pipe is made, or the temperature in the area where the chimney goes into the roof does not reach 60 degrees, then the danger for the films No.
Therefore, it is believed that the films do not require additional fire protection, and they can go directly to the pipe, and the joints can be glued with adhesive tape. In order to divert water from the system, it is necessary to make a groove.
Now let's look at some more points that will help answer the question of how to install a pipe on the roof.
- If you do not install the box, then do not forget to make a gap between the pipe and combustible structures.
- It is best if the output pipe does not have joints. In the event that this is not possible, then make the docking higher than the pipe exit from the ceiling and lower than the roofing material and the crate. All connecting places must be pulled together with iron clamps, wrapped with asbestos and fixed.
- If you decide to resort to brickwork, then use burnt bricks designed for stoves. Both cement and sticky clay can be used as a solution.
- You can use ready-made chimneys, which have recently conquered the construction market. In this case, only the installation of a pipe on the roof will be needed. It is worth noting that such chimneys are well insulated and protected, so they do not require additional covering with expanded clay or asbestos.
Tip! In order to provide fire protection to the roofing material, at the final stage you need to install a visor.It will help not only protect the pipe from sparks, but also from precipitation.
We protect the joints
In order to create tightness between the roofing material and the chimney, you need to make an internal apron.
For this, the lower adjacent strips are suitable. It is necessary to attach the bar to the walls of the pipe and mark the point of the upper edge. On the resulting line, you need to walk with a grinder and break through the strobe.
The apron must be started from the bottom wall, while the edges should be inserted into the gate, and then mounted along the remaining walls with an overlap of 15 cm. The edges of the plank inserted into the gate must be sealed and secured with self-tapping screws.
After installing the apron, a tie is installed, which is designed to drain water.
The sheet from the tie should be sent to the valley or to the cornice of the roof. If desired, a side can be made with pliers on the edges of the sheet.
Now you can mount the roofing material. After the roofing material is installed around the pipe, a decorative apron should be made. It is done in the same way as the internal one, only it is attached without a strobe.
In other matters, you can simply purchase a finished product designed for chimneys do-it-yourself hipped roofs. As a rule, they have a round shape and are made of a steel base connected to an apron. The chimney is located inside the valve.
In the event that you do not know how to bring a metal pipe through the roof, then do not despair.Just remember that this pipe comes out just like all the others, so just read everything again and you can start making a chimney.
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