Corrugated roofing is good decision to protect the building from atmospheric influences for many decades to come. This one is economical and reliable material used when installing roofs in individual and multi-apartment housing construction, during the construction and repair of production areas or other facilities.

Correct sealing of the chimney on a corrugated roof is a guarantee of the safety of the entire structure. Work on waterproofing the joint between the pipe and the roof is carried out both at the stage of roof installation and during the repair (replacement) of the roofing or chimney.

Installation of a pipe of any configuration requires a fire-prevention gap between the roofing pie and the chimney. The result is an opening around the outer perimeter of the chimney into which atmospheric moisture freely penetrates. If this gap is not sealed tightly, then the water will quickly begin to destroy the roof elements with which it comes into direct contact.

The following negative consequences of depressurization of a corrugated roof in the area of the chimney are possible:

Rotting of wooden structural elements of the roof.
Structural destruction of synthetic roofing pie thermal insulation materials. As a result, thermal insulation loses its effectiveness, and the processes of destruction of the structure increase.
Corrosion of corrugated sheeting from the joining edge. In the place where the corrugated sheeting was cut, its protective layers become vulnerable to external influences. The destruction of the protection will provoke the process of rusting of the iron base.

Note! Sealing a chimney on a corrugated roof is not difficult and can be done using ready-made devices. Special aprons from the manufacturer of corrugated roofing sheets are reliable in operation and do not spoil the aesthetics of the building.

Methods for sealing pipes of various configurations

The method of sealing the gap between the chimney and the roof depends not only on the capabilities and preferences of the craftsman, but also on the size of the hole, the shape of the pipe, and the roofing material.

Installation chimney, as a rule, is not a difficult process, however, in some places, for example in transitions through floors, some difficulties may arise. An important point is to ensure proper waterproofing. We will talk about this and other nuances related to how to seal a chimney pipe in this article.

Even if the pipe is placed as tightly as possible on the roof, minor gaps will still remain. When it rains through them in attic space Moisture will constantly enter, which will eventually lead to damage to the roofing structures. This is why roof pipe sealing is so important.

How can you eliminate gaps?

The easiest way to solve the problem of how to seal the gap between the pipe and the roof is to install an apron on top. You can do it yourself, in which case you will need to provide strips for connection to the pipe in advance. There is an easier way - to buy a ready-made stainless steel roof passage. Often, round passages are made for the chimney, and they are made of stainless steel. The passage is placed on the pipe, and the joint is fixed with a steel clamp.

If you need to seal minor gaps formed between the pipe and the roof, then for these purposes you can use silicone sealant (read: “What sealants for chimneys It’s better to use species. characteristics"). You can find a huge variety of them on sale, but we need a heat-resistant type.

The process of how to seal the roof around round pipe, will differ slightly depending on the type of roofing, that is, in addition to the basic recommendations, there are also algorithms that will differ somewhat.

Seal gaps between chimney and slate roof

Sometimes the question arises of how to seal the gap between the pipe and the slate.

The technology provides the following sequence:

First, a round hole is cut in the steel sheet that will be needed to finish the ridge.
Next, a ring of sheet asbestos cement is placed on the pipe.
For absolute sealing, so that in the future there will be no problems with the leaking pipe on the roof, the joint between the pipe and the roof is sealed with an asbestos cement solution (proportion 1:2).
In addition, the same solution is used to fill the gap between the chimney pipe and the slate sheet. To do this, you can temporarily make a limiter out of cardboard.

Getting rid of cracks on a tiled roof

On a tile roof, it is best to seal the cracks with a solution of sand and cement, which the best way will protect the interior of the building from moisture and precipitation.

To achieve the best moisture insulation, you will need:

Install a galvanized collar on the roof, thus creating a place for pouring the solution.
Pour a solution of cement and sand, making sure that it clearly fills the entire space between the roof and the chimney.
In addition, you will need to make a surface and place it at an angle so that excess liquid flows down it.

Material for waterproofing bitumen roofs

Among the options for covering a pipe on the roof if it rises above a bitumen roof, the most optimal is the use of Wakaflex self-adhesive tape.

You can perform isolation in this way:

First, cutting is done from the Wakaflex tape.
At the next stage, this cutting needs to be pressed with a pipe case.
At the end, all remaining gaps between the parts being connected are sealed with bitumen mastic.

The process of eliminating cracks in a corrugated roof

As a rule, when installing a chimney through a corrugated roof, a ready-made Master Flash pipe cutting is used. Another advantage is that this set is very convenient to use; it can be used for roofing made of almost any material. Read also: “Methods of installing a chimney on the roof of a house - advantages and disadvantages of different options.”

In essence, Master Flash is an apron cap made of silicone or rubber, placed on an aluminum base.

As for operating temperatures, for the silicone version of products it is significantly wider - in the range from -50 to 130 ℃.

The process of sealing cracks on a profile roof includes the following manipulations:

A gap is cut in the cap, the diameter of which is slightly smaller than the cross-section of the chimney.
The Master Flush is put on the chimney.
A gasket is placed at the base of the chimney.
The joints between the material are sealed with silicone sealant.
The base of the chimney is fixed to the profile roof using screws.

Often the described manipulations do not provide sufficient tightness on the profile roof, so that during rainfall water leaks into the cracks. In such cases the best option is the use of self-adhesive tape reinforced with aluminum. It is very convenient to use such material, since it does not require pre-heating before use.

Thus, the fact how well a corrugated roof will be sealed at the exit point of the chimney depends largely on the choice of material and the quality of the work performed. However, we are confident that by following our instructions exactly and working responsibly, you will be able to protect your home from any surprises associated with roof leaks.

Despite all the efforts of the roofers to lay the roofing covering as closely as possible to the chimney and various protrusions, there are still leaks at the junction points. Water from the roof can thus enter the under-roof space through the cracks formed. Therefore, they all need to be properly sealed.

One of the most discussed issues among stove builders is how to seal a pipe on the roof. At a time when stove heating was present almost everywhere, when installing the chimney on the roof, a special thickening was made, which protected the roof from leaks. Nowadays, brick pipes everywhere have given way to metal, often serially welded chimneys. It is also worth noting that modern stove makers, when choosing a brick for a pipe on the roof, do not thicken it.

In order not to encounter the most unpleasant situation when a pipe is leaking, you need to figure out how to seal a pipe on the roof.

Principles of closing gaps

The cracks are closed using various available materials. Schematically they can be divided into two groups:

Elements used to close the gaps between the chimney and the roof. These are different aprons, collars, both factory-made and home-made. The materials used are corrosion-resistant galvanized steel, rubber or silicone. Additional elements may differ in appearance and technical characteristics. Functionally, their installation provides initial rough closure of the joints.
All kinds of sealants used to fill the remaining cracks. Eg, cement mixtures or mastic. Today, more than one is used to solve these problems. modern materials, which are simple and very convenient when performing insulation work, for example, self-adhesive tapes.

How to seal the gap between the pipe and the roof

As soon as the pipe is made, roofers are faced with the question of how to seal and waterproof the joints , how to seal a chimney. Various materials are used for this. Let's note a few of the most common ones.

Silicone sealant for chimney on the roof. This is a frost-resistant, waterproof material. It is easy to use and affordable. In addition, silicone sealant has a high level of heat resistance, up to 150˚ C, therefore it is widely used in the construction of baths and steam rooms.
Bitumen mastic. The surface to be treated is pre-cleaned and dried. The mastic is applied in a layer 3 or 4 mm high. If the gap turns out to be too wide, then you can first fill it with polyurethane foam, and only then apply bitumen mastic.

Ecobit. This insulating material provides sufficient good waterproofing. It is a reinforced self-adhesive aluminum tape with a sealing layer of special modified bitumen. It is laid along the perimeter of the chimney.

Enkryl. This is a one-component acrylic mastic made in Germany, which is used to treat problematic joints. The waterproofing process takes place in 4 stages.

1. degrease the surface around the perimeter of the pipe;

2. Using a brush, apply the first layer of Enkryl liquid mastic;

3. the pipe is wrapped with Polyflexvlies Rolle (this is a viscose-based reinforcing fabric), which will provide additional elasticity to the waterproofing;

4. After 15–20 minutes, when the mastic has already been absorbed into the fabric, apply the second layer.

According to the manufacturer, it will hardly be possible to see that the roof near the pipe is leaking for 9-10 years.

How to seal a roof pipe from different materials

Technologies for sealing cracks depend on factors such as the type of roofing material, the size of the gap, and the shape of the smoke channel. Let's take a step-by-step look at the process of sealing a roof pipe from rain for popular coatings.

Tile roof

The gaps formed between the roof covering and the outer wall of the chimney must be lined with stainless steel corners. If the chimney has an oval or round shape, the metal corners can be replaced with rubber seals with an adhesive backing.
A special decorative collar is prepared from galvanized sheet steel. It is put on through the head of the chimney and secured with self-tapping screws. Thus, a space for filling is formed between them.
A viscous cement-sand waterproof solution is poured into the formed gap and left for a day. This time should usually be enough for the mixture to harden.

To drain water from the roof, an inclined surface is formed. This is done as follows: a hole is cut out in a stainless steel sheet. Its diameter should correspond to the size of the collar. Having placed the cut sheet on the head, it is secured with self-tapping screws.

Slate roofing

Mortar sealing is the most affordable technology for sealing a slate roof. However, in the case of round chimneys, the use of this method is associated with certain difficulties. This problem can be successfully solved using the following algorithm.

A sheet of polyethylene is placed on thick cardboard and a ring is formed. It is inserted into the gap between the roofing and the chimney.
A temporary restrictive edge is formed on the slate from some plastic material, say, plasticine.
An asbestos-cement solution is poured into the resulting gap.
After mortar hardens, the side and cardboard cylinder are removed.
In their place remains an asbestos ring, which serves as waterproofing.

Roofing made of bituminous tiles

On soft roof Usually they do the cutting. The gaps are sealed using a special apron, which is framed with a flexible self-adhesive tape based on rubber, for example, “Vakaflex”. The tape is carefully glued to the existing adhesive layer around the perimeter of the chimney, running it from the roof surface to the walls of the chimney. Then the cutting is pressed with a case. The gaps remaining between the flexible roofing material and the chimney are sealed with bitumen mastic.

If the gaps are large enough, they are first filled with tow or rope. Before this, the material is impregnated with compounds that give it waterproof qualities. For example, use oil paint, bitumen and more. Gaps can also be filled with cement mortar.

Waterproofing a chimney on a corrugated roof

Connecting a corrugated sheet to a chimney with a rectangular cross-section. The most common way to seal a chimney in this case is to install an apron. This shaped element is made of galvanized steel sheet. Install it on the roof, painted in the color of the roof.

Main part installation work connected to metal junction strips, which must be located in the lower lobe of the chimney.
Since the pipe is routed through corrugated sheeting, the vapor and waterproofing layers are cut as a result. They are carefully glued to the outer walls of the chimney using tape.
A shallow groove (about 1.5 cm) is made along its perimeter using a special machine.
Part of the abutment strip, bending the upper edge, inserts a groove and additionally fixes it with silicone sealant with high level heat resistance.

The next stage of sealing is installing the tie. This is a waterproofing sheet through which water flows into drainage system, bypassing the chimney.
Corrugated sheeting is laid on top of the installed elements.
Then it’s time to install an additional external false apron. Its installation is practically no different from the installation of an internal one. The only difference is that the upper strips are screwed not to the chimney, but to the chimney itself.

Connections to a round or oval pipe. The junction points can be very easily waterproofed using an elastic penetration, say, Master Flash. For roofs made of corrugated sheets they are used as follows:

Select a penetration of the appropriate size and carefully cut it in a narrow part until you achieve a snug fit of the chimney.
Remove the nozzle from the stove pipe and carefully pull the elastic penetration onto it to the very end. Next, it is attached to the roof using a self-adhesive base, silicone sealant or roofing screws.
The finishing of the chimney on the roof is completed by installing a decorative apron on it, which looks like a cap. It is chosen to match the color of the roof. The apron protects the penetration from damage due to mechanical stress or ultraviolet radiation.

The article discusses options for sealing gaps between the chimney and the roof. How to seal a pipe on the roof using the example of the most common types of roofing

What is the best way to seal the gap between the pipe and the roof?

Bringing a pipe or ventilation shaft through the roof involves making a hole in it. When a pipe passes through, there always remains a gap, which, even at its lowest value, will allow moisture to pass through. Today we’ll look at how to achieve perfect tightness at the junction of the pipe and the roof and how to seal the resulting gap between the pipe and the roof.

Consequences of poor sealing of joints

When venting a chimney, a hole is always made in the roof with a slightly larger diameter than the chimney itself. This is due to the need for convenient and trouble-free pipe installation and safety rules. If the pipe gets very hot and the roofing pie is formed from flammable materials, then the gap between the pipe and the roof reaches 15 cm.

Poorly sealed joints are fraught with a number of unpleasant consequences:

Reducing the operating time of the rafter system. Wood reacts poorly to moisture, rots or becomes moldy. All this reduces the rigidity of the rafter frame and leads to its destruction;
Destruction of roofing material. Most of roofing materials perfectly protected from moisture from the outside, but not from the inside. Water in the roofing pie will lead to the destruction of the roof and its rapid wear;
Destruction of insulation. Thermal insulation materials, as a rule, are especially sensitive to high humidity. In such conditions, they lose their insulating properties and begin to collapse;
High humidity in the under-roof space. Humid air can cause increased humidity in the attic itself. It will become unpleasant to be there and will deteriorate interior decoration rooms.

Competent and thorough sealing of the gap is a guarantee of long and reliable service for the roof and the entire house. Let's take a closer look at how to seal the gap between the pipe and the roof on various types roofs.

Principles of sealing the gap between the chimney and the roof

Closing the cracks is carried out using a number of available materials, which can be schematically divided into two categories:

Elements that cover the gap between the roof and the pipe. These are various aprons and collars that are made of galvanized steel, rubber or silicone. They may have different appearance And specifications, be homemade or factory-made. Their main purpose is the initial rough closing of the gap between the roof and the pipe;
Various sealants, that is, materials that fill the remaining cracks. These include cement mixtures and sealants. Among modern generations there are adhesive tapes that are convenient and easy to use.

For different types roofing ratio and the choice of these materials will be different. Let's consider this issue in more detail.

Tile roof

On tiled roofs it is more convenient to use a solution of cement and sand. For this type of roof this is the best and convenient solution sealing gaps.

Let's imagine step by step how to seal a pipe on a tile roof:

A special collar is prepared from galvanized steel, which forms a place for pouring the solution;
When filling a gap with a cement-sand mixture, it is important to ensure that it fills all the niches near the roof and the pipe itself;
An inclined surface is created to drain rainwater.

Slate roof

How to seal a pipe on a slate roof? The answer is simple: asbestos-cement mixture.

The work order will be as follows:

A hole in the form of a circle is made in a sheet of steel and placed on the chimney;
A solution of asbestos and cement is created in proportions of 2:1;
The gap between the chimney and the sheet is filled with diluted asbestos-cement mixture;
The mixture fills the gap between the chimney and the roof. For convenience, you will need a limiter, which can be made from a board or cardboard.

Soft tile roofing

On the roofs of flexible tiles cutting is done. The gap must be closed with a special apron element. It is framed with flexible adhesive tape such as “Vakaflex” based on rubber.

The tape is placed on the chimney and base and carefully glued using its own adhesive layer. Next, the groove is pressed against the pipe casing and all gaps are filled with bitumen mastic. Gap filling can also be done.

cement-sand mortar

Roof made of corrugated sheets The question of how to seal a gap between a pipe and a corrugated roof is easily solved with the help of ready-made pipe cuttings, which allow you to quickly and efficiently seal all the gaps. Finished pipe cuts represent the connection of the apron and cap in a single piece. They are made from various materials

and are designed for a wide range of temperature fluctuations.

Working with this element looks like this:
A hole is made in the cap with a diameter smaller than the diameter of the pipe being discharged;
Using a soap solution, the element is pulled onto the pipe;
A gasket is placed at the base of the cap;
All joints are filled with heat-resistant silicone-based sealant;

The base is attached to the roof with screws.

Repair of leaking pipework

It often happens that the junction of the chimney and the roof begins to leak water. Adhesive tape with aluminum reinforcement will help you quickly and easily correct this situation. Its use is convenient because it does not require special preparation. It is applied to the cleaned surface in a place where moisture is likely to pass through and is glued thanks to its own adhesive layer.

Let's sum it up

Sealing the gaps between the pipe and the roof is a simple but responsible task. Even a novice builder can handle it. To carry out this work correctly it is necessary to take into account:
Gap size;
Type of roofing material;

Pipe shape.

The modern market offers a wide selection of not only various sealants, but also ready-made cuttings for organizing a high-quality connection between the pipe and the roof. We advise you to pay attention to them when arranging a chimney with your own hands.

How can you correctly seal a pipe on the roof? Options for sealing the gaps between the chimney and the roof are considered using the most common types of roofing as an example. Are given useful tips

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And Self finishing

Many people believe that finishing a chimney on the roof is needed only for beauty, this is partly true, but the aesthetic component is not in the first place here. The lining is needed, first of all, to protect the chimney, both from the inside and the outside. Next, we will look at the 3 most popular methods of arranging a chimney, plus you will learn why this is necessary and how to sheathe the pipe with your own hands.

Why finish the pipe?

There are at least 3 reasons why it is necessary to finish chimneys on the roof:

High temperatures, on the one hand, and cold air on the other, lead to condensation settling on the inner surface of the pipe. But it is not plain water, condensation is an aggressive acid cocktail that gradually corrodes the pipe. External insulation shifts the dew point inside the insulation and eliminates the appearance of condensation;

222222If a solid clinker brick or a stainless steel pipe was used to construct the chimney, then these materials are not afraid of weather troubles. While ordinary brick without external protection in a couple of years it will begin to crumble, the steel will rust, and the concrete will crack;
In addition to the strength of the chimney, there is also such an important point as protecting the roof itself from rain. If the sealing of the sector connecting the pipe with the roof was performed poorly, then within a year the insulation will become unusable, and the wooden rafter system will start to deteriorate.

Standards and possible finishing options

The chimney system, as well as the entire stove system, is an important fire-hazardous facility; accordingly, all aspects of its arrangement are strictly regulated.

Rules and regulations

All important points related to the arrangement of heating, ventilation and air conditioning systems are described in detail in SNiP 41-01-2003. The work is quite voluminous, so I will recount only those standards that apply to chimneys:

The ignition temperature of thermal insulation and finishing materials the pipes should be 20 ºС higher than the maximum outside temperature of the chimney, but ideally it is advisable to line the chimney with non-combustible materials;
Sheathing the pipe with metal is allowed, but the metal must have an anti-corrosion coating;
The brick pipe must have walls with a thickness of 120 mm;
Concrete chimneys are rarely installed in private houses, but if you decide to install such a pipe, the concrete must be reinforced, heat-resistant and have a wall thickness of 60 mm or more;
The minimum gap between the chimney and the wooden roof sheathing is 130 mm;
For ceramic chimneys not protected by thermal insulation, the gap between the pipe and wooden structures roofing is from 250 mm;

How to finish a chimney pipe

Illustrations	Recommendations
	Clinker tiles. The above-mentioned clinker brick is a good thing, but expensive. Therefore, many people lay out the pipe from ordinary bricks, and line it with clinker tiles on top. The material can withstand any vagaries of weather, plus such tiles can be used to cover not only chimneys, but also the stoves themselves inside the house.
	Plaster. The option is not as durable as clinker tiles, but if you attach a reinforcing mesh made of fiberglass or galvanized metal to the surface of the pipe, the plaster will stick well. But keep in mind that not everyone is capable of high-quality plastering of the surface with their own hands while standing on the slope of the roof.
	Siding. To line the chimney, you can use any type of siding, except plastic. Both metal and cement siding are equally suitable for lining chimneys. Moreover, this material is mounted on the sheathing, which means it is possible to lay insulation under it.
	Corrugated sheet. Finishing chimneys with corrugated sheeting is now one of the most common. This option harmonizes especially well with metal tiles. But if you choose the color, then steel chimneys on roofs made of slate, ondulin or ceramic tiles will also fit into the overall design.
	Bituminous shingles. Since the material is produced with the addition of bitumen, finishing a real chimney with it is strictly prohibited. In this case, we can only talk about installing a decorative cocoon made of fire-resistant plywood around the pipe, onto which the bitumen shingles are placed. But this option is only suitable for sandwich pipes equipped with a spark arrester head.

Three options for independently arranging a chimney outside

There are 3 options where a person without special training can do everything with his own hands. The first option concerns brick pipes, which do not need lining, but you need to seal the joint with the roof. After this comes frame option and an option with ready-made factory solutions.

Option number 1: we arrange a brick pipe

Waterproofing the pipe on the roof should be carried out before laying the roofing material. If the roof is already in place, you will have to partially dismantle it. The entire perimeter of 50–70 cm around is removed, plus you need to remove the lower part of the roof from the pipe to the edge of the slope.

The materials we need are a wall metal profile. You can bend it from galvanized steel with your own hands or buy it ready-made. The profile consists of 4 parts, which are superimposed on each other during installation.

It is definitely better to buy an external apron for the pipe, and it is advisable to buy it together with the roofing material, it is easier to choose the color.

The so-called tie is a sheet of roofing iron with sides curved on the sides. It is laid from the bottom of the pipe to the edge of the slope and placed under the lower section of the wall profile.

In order to hermetically connect a brick pipe with a wall profile, we need to cut a groove about 20–30 mm deep on the pipe with a grinder. The curved edge of the profile is inserted into this groove.

Next, we insert the curved edge of the profile into the groove and fill the groove with sealant. Then we fix all 4 parts of the profile and the tie, fastened from below with self-tapping screws and press washers. Roofing material is laid on top of this entire structure.

The upper apron is attached to the pipe with self-tapping screws along the entire perimeter. It must extend onto the pipe by at least 100 mm. Bottom part The apron is often made from soft bituminous materials. It is pressed around the corrugated roof and glued to this roof with mastic or special glue.

The scheme works something like this: the main amount of moisture is removed from the pipe by the upper apron, but if this barrier does not cope with its task and moisture gets under the roof, then it will be collected by the wall profile and the water will flow down the tie from the roof.

Option No. 2: frame installation

This method is well suited for insulating and lining the chimney with corrugated sheets, siding and other similar materials. To begin with, the base is sheathed with a metal profile; later we will attach corrugated sheeting to it. It is better to make the frame from a wall profile under plasterboard; it is wider than the ceiling.

It is not difficult to work with a metal profile, but if you are not confident in your abilities, you can build a frame from wooden blocks. Is it true wooden frame it will need to be well saturated with fire retardants, antiseptics and a water-repellent composition. Between the frame slats, slabs of dense mineral wool are laid to insulate the pipe.

Corrugated sheet or any other sheet material It is screwed to the frame slats with self-tapping screws and press washers. The whole structure is crowned with an umbrella for protection from the rain.

Option No. 3: ready-made solutions

There are no problems at all with round pipes now. Special flexible aprons are produced for them. Based on experience, such an apron can be installed in a couple of hours maximum. Photo instructions for installing such an apron are given below.

Select the pipe diameter you need and cut a hole in the soft polymer cone;
Pull the cone onto the pipe, the connection should be tight;
Crimp the lower ring of soft metal to the shape of the roof;
Thickly lubricate the perimeter under the ring with sealant;
Screw the ring to the roofing material using self-tapping screws and press washers.

Conclusion

It is quite problematic to talk in detail about all the methods of finishing chimneys in one publication, so I tried to select for you the 3 most accessible ones. home handyman option. If after reading the article and watching the video in this article you still have questions, write in the comments, I will try to help.

Installing a chimney in general is not difficult, but there are some places, for example, passages through ceilings, that can cause difficulties if you lack experience. It is important to remember that when installing a chimney, proper waterproofing should be ensured.

No matter how tightly the pipe is placed to the roof, there will still be a gap. In rainy weather, precipitation will fall into the inner layers of the roofing pie and cause irreparable damage. That is why sealing the gaps between the pipe and the roof is important stage construction of a chimney, which should not be neglected.

Methods for filling gaps

The easiest way to seal the gap between the pipe and the roof is to install a special protective element on top - an apron. You can build such an element yourself, but you will need to provide junction strips on the pipe in advance. You can do it even simpler - purchase a ready-made roofing passage made of stainless steel. As a rule, the chimney passage has a round cross-section, and the material for its production is galvanized steel. The passage is placed on the pipe, and the joint is additionally secured with a steel clamp. The galvanized passage for the chimney is shown in the figure:

If you need to seal small gaps between the pipe and the roof, a silicone-based sealant is suitable. Today, any hardware store offers a huge selection of sealants; your choice must be made on a heat-resistant option.

Except general recommendations There are also specific specifications for sealing cracks for various roofing materials. Therefore, the algorithm for waterproofing differs on slate, tile, bitumen roofs, as well as corrugated roofing.

Sealing cracks in slate roofing

If it is necessary to seal a gap in a slate roof, an asbestos-cement mixture is used. The process technology is as follows:

Cut out round hole in a steel sheet, which is used for finishing the ridge.
A ring of sheet asbestos cement is placed on the pipe.
For complete tightness, it is necessary to seal the joint between the pipe and the roof with a solution of cement and asbestos, which are diluted in a ratio of 1 to 2.
It is also necessary to fill the gap between the chimney pipe and the slate sheet with asbestos-cement mortar. For this purpose, you can make a temporary limiter from cardboard.

How to eliminate gaps on a tile roof

The best way to seal cracks in a tile roof is to use a cement-sand mortar. It is this method of sealing the pipe that will ensure reliable protection from any type of precipitation.

In order to carry out waterproofing, it is necessary:

Prepare a galvanized steel collar on the roof, thereby creating a space for filling with mortar.
Fill the gap with cement-sand mortar, making sure that it fits tightly to the roof and chimney.
Additionally, make an inclined surface on the collar to drain liquid.

Bitumen roof waterproofing options

To waterproof a chimney that rises above the bitumen roof, Wakaflex self-adhesive tape is used. The stages of the work are as follows:

Making cuttings from Wakaflex roofing tape.
Pressing the cutting with a pipe case.
Seal the gaps between the connected elements with special bitumen mastic.

Sealing cracks on a corrugated roof

If it is necessary to remove a smoke exhaust device through a roof made of corrugated sheets, ready-made pipe cutting Master Flash is most often used. This roofing element is very convenient to use and can be used not only for corrugated sheeting, but also for other roof materials.

Master Flash is an apron-cap, which is a rubber or silicone apron on an aluminum base.

Silicone Master Flash has a wider operating temperature range, but most often rubber is sufficient, which can withstand loads from -50 to +130 degrees.

Sealing cracks on a corrugated roofing looks like this:

Make a hole in the cap so that it is slightly smaller than the diameter of the chimney.
Put Master Flush on the pipe.
Place a gasket under the base.
All joints should be reliably sealed with heat-resistant silicone-based sealant.
Attach the base to the corrugated roof with screws.

There are cases when such waterproofing is not enough and water leaks at the joint. The way out is to use a special self-adhesive tape reinforced with aluminum. It is very convenient to use, because there is no need for preheating before installation.

Right choice waterproofing material will help protect your roof from leaks and premature failure. Following the instructions and doing the job diligently will save you from any trouble.

Installing a chimney is usually not a difficult process, however, in some places, such as floor crossings, some difficulties may arise. An important point is to ensure proper waterproofing. We will talk about this and other nuances related to how to seal a chimney pipe in this article.

Even if the pipe is placed as tightly as possible on the roof, minor gaps will still remain. When it rains, moisture will constantly enter the attic through them, which over time will lead to damage to the roofing structures. This is why roof pipe sealing is so important.

How can you eliminate gaps?

The easiest way to solve the problem of how to seal the gap between the pipe and the roof is to install an apron on top. You can do it yourself, in which case you will need to provide strips for connection to the pipe in advance. There is an easier way - to buy a ready-made stainless steel roof passage. Often round passages are made for the chimney, and they are made of stainless steel; a galvanized chimney pipe is also used, most often. The passage is placed on the pipe, and the joint is fixed with a steel clamp.

If you need to cover up minor gaps formed between the pipe and the roof, then you can use silicone sealant for these purposes (read: ""). You can find a huge variety of them on sale, but we need a heat-resistant type.

The process of how to seal a roof around a round pipe will differ slightly depending on the type of roofing, that is, in addition to the basic recommendations, there are also algorithms that will vary somewhat.

Seal gaps between chimney and slate roof

Sometimes the question arises of how to seal the gap between the pipe and the slate.

The technology provides the following sequence:

First, a round hole is cut in the steel sheet that will be needed to finish the ridge.
Next, a ring of sheet asbestos cement is placed on the pipe.
For absolute sealing, so that in the future there will be no problems with the leaking pipe on the roof, the joint between the pipe and the roof is sealed with an asbestos cement solution (proportion 1:2).
In addition, the same solution is used to fill the gap between the chimney pipe and the slate sheet. To do this, you can temporarily make a limiter out of cardboard.

Getting rid of cracks on a tiled roof

On a tile roof, it is best to seal the cracks with a solution of sand and cement, which will best protect the inside of the building from moisture and precipitation.

To achieve the best moisture insulation, you will need:

Install a galvanized collar on the roof, thus creating a place for pouring the solution.
Pour a solution of cement and sand, making sure that it clearly fills the entire space between the roof and the chimney.
In addition, you will need to make a surface and place it at an angle so that excess liquid flows down it.

Material for waterproofing bitumen roofs

Among the options for covering a pipe on the roof if it rises above a bitumen roof, the most optimal is the use of Wakaflex self-adhesive tape.

You can perform isolation in this way:

First, cutting is done from the Wakaflex tape.
At the next stage, this cutting needs to be pressed with a pipe case.
At the end, all remaining gaps between the parts being connected are sealed with bitumen mastic.

The process of eliminating cracks in a corrugated roof

In essence, Master Flash is an apron cap made of silicone or rubber, placed on an aluminum base.

As for operating temperatures, for the silicone version of products it is significantly wider - in the range from -50 to 130 ℃.

The process of sealing cracks on a profile roof includes the following manipulations:

A gap is cut in the cap, the diameter of which is slightly smaller than the cross-section of the chimney.
The Master Flush is put on the chimney.
A gasket is placed at the base of the chimney.
The joints between the material are sealed with silicone sealant.
The base of the chimney is fixed to the profile roof using screws.

Often the described manipulations do not provide sufficient tightness on the profile roof, so that during rainfall water leaks into the cracks. In such cases, the best option is to use self-adhesive tape reinforced with aluminum. It is very convenient to use such material, since it does not require pre-heating before use.