Technology laying soft roofing from bitumen shingles

Soft roof - this is given to the type of cover familiar to most people. Not so long ago, one of the most widely used materials for covering roofs of various designs was a common roofing material, which also belongs to this category of roofing. In fairness, it should be noted that the old roofing felt was not particularly strong and high performance characteristics, so it required periodic repairs.

Technology of laying soft roofing from bituminous shingles

Today, thanks to the new technologies, soft roofing material has undergone significant modernization. It is produced in various versions, including in the form of bituminous shingles. Such coatings already have long service lives, combine high quality, excellent waterproofing characteristics and a very elegant appearance. Therefore, many do not realize that the modern soft roof is the same ruberoid, only produced in improved variations.

The technology of laying soft roofing from bituminous shingles is quite complex, and requires a large number of different materials, since the construction of such a coating consists of several layers, and therefore deserves the name of a "roofing pie".Therefore, if it is decided to make an independent installation of a coating of this material, it is necessary to carefully study all the recommendations that should be followed when carrying out the work.

Features soft roofs

Beforemake a decision about choosing a soft roof, you need to have an idea about this material, evaluate its merits and demerits.

Advantages of soft roofs

Soft roofs have a number of unique qualities

There are different types of soft roofs, but they all have very high physical and technical and operational characteristics:

• Roofing material has a multi-layer structure, which is capable of providing the highest degree of waterproofing. Therefore, it is not necessary to additionally coat the waterproofing membrane with such a material.
• Unlike a conventional old roofing material, modern soft roofing materials do not melt from the summer heat and do not become brittle in severe winter frosts. Not afraid of them and sudden temperature changes - the material is elastic and compensates for all linear thermal expansion on its own.
• Modern roofing on a polymer-bitumen base shows excellent resilience to mechanical loads due to its elasticity and flexibility of the material.
• Due to the multi-layer structure, the soft roof has an excellent sound-absorbing effect. Therefore, during the rain or hail in the premises of the house there will be no unpleasant noise.
• The material has the highest resistance to the development of parasitic forms of microflora, it does not become a nutrient medium for any other life forms, it is completely non-corrosive.
• With respect to the installation technology of such a coating, it will not require repair and will not change its original decorative appearance, including shade, for many years and decades.
• The soft roof has the properties of a dielectric, that is, it does not attract electrical charges generated in the atmosphere during a thunderstorm.

Disadvantages of soft roofing

It is necessary to take into account some negative aspects inherent in soft roofs, in particular, the rather complicated installation of

. There are several points that can be called disadvantages of this roofing material, but they are, to be honest, very conventional. So, to similar "minuses" it is possible to carry:

• Quite complex installation of "a roofing pie", demanding exact observance of all technological recommendations.
• Any soft roof is laid only on a solid solid foundation. And this, in turn, entails additional work and, accordingly, costs.

However, as you can see, the negative aspects in the arrangement of a soft roof - much less, and therefore, more and more often the owners of mansions choose their choice on it.

Different types of soft roofing

Several types of materials that can be easily found on the Russian market include flexible bituminous shingles, roll-type soft roofs of various types, and Euroshield( ondulin).

Rolled soft roof

Modern roll soft roof differs dramatically from the old roofing material

Roll roofing materials are divided into several criteria. So, the following types of coatings are produced:

• Non-basic and having a substrate for coating.
• The basis for roofing roll materials can serve - fiberglass, asbestos fiber, cardboard, polymers, or for it can be used several materials in the complex.
• The roofing material can be equipped with various protective layers - fine-grained or coarse-grained mineral crumbs, pulverized or scaly powder.

In addition, roll coatings can be divided according to the type of substrate and method of installation:

• Self-adhesive coatings. Such material has a layer of adhesive composition applied to the back of the web and protected by a special membrane, which is removed immediately before the installation of the coating.

Structure of the roofing on a self-adhesive basis.

• Adhesive cloths. These coatings are glued on the mastic in various ways, which are called hot and cold. But in any case, the material is heated to a certain temperature during installation.
• Welding coatings. This type of coating is fixed on the roof surface using gas burners. The flame of the burner melts the composition applied to the back of the soft roof material, after which the coating rolls. This kind of coating, properly laid on the prepared surface of the roof, makes it virtually tight and resistant to leaks. In addition, this type of material is considered the most durable of all roll options.

Membrane roll roof

Modern soft roofs include

membrane coatings. Membrane coating is a high-tech material that can be manufactured on various substrates: polyvinyl chloride( PVC), synthetic rubber( EPDM), thermoplastic polyolefin( TPO).

Different types of roofing membranes

• The PVC membrane, reinforced with ether fiber and having plasticizers in its composition, has high elasticity and resistance to temperature changes. In addition, the material does not burn out in the sun, fire resistant, is available in a variety of colors, and also easily and quickly mounted on the surface. However, this coating has its drawbacks - it does not differ in resistance to organic solvents, bitumen and oils. In addition, when heated, the PVC coating can release toxic substances to humans, since it is not environmentally friendly.
• EPDM membranes made from rubber and reinforced with polyester mesh have high elasticity and resistance to various solvents.

The negative qualities of this material can be called the fact that its installation is done with glue, and joints with time, under the influence of external factors, can diverge, so the roof will leak, as the coating will lose its tightness.

• TPO membranes produced on the basis of a thermoplastic polyolefin may be reinforced or manufactured without it. To reinforce this material, polyester or fiberglass is used. The material webs are welded together by means of hot air, and a sufficiently strong and reliable weld is formed at the welding site. Therefore, the coating has a long service life, high strength and resistance to negative temperatures, reaching -60 degrees.

The shortcomings of such a coating include its low elasticity and a relatively high cost, compared to other membrane materials.

In brief - about the principles of the

membrane roofing flooring There are four main ways of installing a membrane roof: ballast fixation, mechanical fastening, gluing and hot air welding.

• Ballast fastening is used in case the roof has a small slope not exceeding 15˚.

In this case, the canvas is laid on the concrete base of a flat roof or on a layer of laid thermal insulation. Then the material is stretched, fixed around the perimeter, the joints of the sheets are connected by welding or special glue.

Approximate principle of ballast fastening of roofing material

Then, on top of the membrane, ballast is laid from pebbles, gravel or crushed stone.

• Mechanical fastening of the is performed if the supporting structure is not designed for the weight of the ballast.

The membrane is laid over the multi-layer thermal insulation of the flat roof

The basis for mounting the membrane in this way can be wood, concrete, profiled sheets, and also any other material.

Flat roof thermal insulation scheme with subsequent membrane coating

The layer is laid and fixed layer of insulation material. Most often, mineral basalt wool of high density is used for this purpose, specially designed for such applications, on top of which the membrane is stretched and fixed. To fix the materials to the base, disc or telescopic fasteners are used, which are installed on the joints of sheets overlapped by 80 ÷ 100 mm.

• The membrane is glued to high-quality glue mixtures that are characterized by good strength. The material is glued only around the perimeter of the canvas, at joints and in problem areas, for example around chimneys, on ribs, valleys, etc.
• Hot air welding - this method is often used by to fasten membrane sheets.

Welding of two adjacent liners of

roofing membranes. The work is carried out with the help of a special machine, which squeezes two linen sheets lapped with a roller and hot air, the temperature of which reaches 600 ˚С.The welded joint can be from 20 to 100 mm in width, which ensures the reliability of the connection and ensures its sealing.

Evroshifer or Ondulin

Ondulin sheets of various colors

Another version of the roofing material, which can also be classified as a soft roof - is ondulin or Euroshow. It is a light and reliable wavy material made of a bitumen-fiber mixture with the addition of mineral and polymer additives. Roofing sheets are easy to install and usually have a very long life. The material is produced in various shades of calm tones, from which it is always possible to choose a suitable facade for a specific design.

This material can be installed not only on a solid base, but also on a lath made of boards with a width of 150 ÷ ​​170 mm fixed in steps of 200 ÷ 250 mm.

Ondulin is the only material from the category of soft roofing, which has a rather rigid relief structure, and therefore can be fixed to the crate.

The installation of the roofing from the ondulin can be carried out on the dilated lath

The installation of the ondulin, as well as any undulating roofing material, is carried out from the eaves. The top rows are stacked with overlapping on the bottom by 250 ÷ 300 mm, and the adjacent sheets arranged in one row are overlapped, one wave. The ondulin is fixed by special screws with waterproofing gaskets and special lids. They are screwed into each crest of the wave along the cornice and the ridge, and in the middle part of the ramp - in steps of two to three waves.

Flexible bituminous shingles

The most probably popular type of soft roofing is asphalt shingles

Bituminous shingles can be safely attributed to the most popular types of soft roof, as it has an aesthetic appearance, a variety of shades and shapes, strength and durability.

The tile is made on a fiberglass base, which is impregnated with high-quality bitumen, on top of which mineral crumb of various colors is applied. Top mineral spraying performs not only decorative function, but also protective, as it prevents mechanical damage to the softer lower layers. Tiles are used to cover houses with pitched roofs of any size and configuration of any complexity.

As the most popular material from the soft roof category is bitumen shingles, its installation will be considered in more detail.

Assembling the roof with bituminous shingles

First you need to understand the roofing "cake", which must be mounted under the flooring of soft tiles. It is very important to perform this work correctly, otherwise the roof will be devoid of reliability and will not last a long time, and in the rooms under it it will be impossible to maintain a comfortable microclimate.

Exemplary workflow

To ensure that the sequence of installation of all elements has been followed, it is best to compile a list of all the jobs in order:

Structural diagram of the "roofing pie" with bituminous soft shingles

• The first step is the installation of the roofing system.
• Further, from the attic side a vapor barrier membrane is fixed to the rafters.
• On top of the vapor barrier, also from the attic, the rafters are fastened to the rafters. It is necessary for the subsequent installation of the inner lining of the attic space, fixing the membrane and creating a rigid base for laying the insulation.
• Next, there is a piling between the rafter feet of insulation mats. Usually mineral basalt wool is used for this.
• The insulation is closed with a waterproofing roofing membrane. It is fixed to the rafters.
• The membrane is pressed against the rafter feet by the counterbrushes.
• Next, the installation of a sparse crate - the foundation for a solid foundation flooring - follows.
• Sheets of moisture-resistant plywood or OSB are fixed on the crate.
• Solid plywood lath is covered with a lining carpet.
• Next, the laying of soft bituminous shingles.
• Fastening the drainage system, covering the eaves with a mosquito net, and then lining or PVC soffit can be carried out at various stages of installation work - as will be more convenient for masters.

Calculations of a soft roofing system for a soft roof

Now, knowing the approximate sequence of mounting a "roofing pie", there is a need to consider them in more detail, since there are nuances that are important to take into account when performing these rather complex technological operations.

The first thing you need to determine is what parameters should the elements of the rafters and crates have, and with what step they are installed.

Let's start with the rafters. The cross-section of the beam from which they are made depends on the steepness of the ramp, the possible external loads on the roof and the step of installing the rafter legs. The dependence is expressed in the following.

External loads include the weight of the structure itself, with insulation, crate and roofing material, the mass of possible snow drifts in the winter and the impact of winds. Both snow and wind loads depend heavily on the steepness of the slope, with the increase in the angle of inclination, the significance of the snow gradually decreases, but the wind increases.

The total load, expressed in kilograms per square meter, should be evenly distributed on the rafter feet. And this, in turn, depends on the step of their installation - the more often they are located, the smaller the load falls on each running meter of the rafter beam, and the less its cross section can be. If the value of the distributed load is known, then according to the table it is not difficult to determine the parameters of the required material.

There is a rather complex physico-mathematical algorithm for calculating the distributed load on rafter legs. But we will not bother the reader with an abundance of formulas and tables, but we will suggest using a convenient calculator. The initial data for the calculation will be:

- Region of construction;

- Steepness of the roof slope, degrees;

- Roofing material;

- Features of the location of the house on the ground and its height.

In the last point of the calculator it will be necessary to preset the intended step of installing the rafters. Changing this value to a greater or lesser side, you can determine the optimal load distribution. And then, according to the table, knowing the length of the rafters, pick up the necessary section of the beam( logs).

Two calculator cards are attached to the calculator, enabling to determine the zones of the construction region according to the level of snow and wind load.

Calculator for calculating the distributed load on the rafter legs

So, to begin with, we define the zones by the maps:

The map-scheme of the distribution of the territory of the RF to the zones according to the snow load level

The map-scheme of the RF territory allocation to the zones according to the level of the wind load

Now substitute the known valuesin the calculator - and get the result

With the result you can enter the table:

Let us give an example.

Let's assume that the calculations showed that the distributed load at the rafter step of 600 mm( 0.6 m) is equal to 90 kg / st.m. We round up to a table value of 100 kg / line.m. The length of the rafters from the mauerlat to the ridge is 5.5 m. The table shows that we will be tripled by the cross-sections on the left in the fourth row above: a round log 160 mm in diameter or a bar measuring 60 × 220;70 × 210;80 × 200;90 × 190 or 100 × 180.

Now you need to determine the thickness of the plywood, which will become a continuous crate for the flooring of shingles. This thickness depends on the step of installing the rafters( if the sheets will be attached directly to them) or an additional sparse lathing, mounted perpendicular to the rafters.

	So, the first step is fixing the rafters. They are installed with a calculated step from each other - see the table and perform the calculations above. Before assembling the wooden elements of the system, it is recommended to treat them with special compositions to impart antiseptic and fireproof qualities. Treated impregnated wooden parts must be allowed time to dry.
	The rafters are cut into the Mauerlat passing along the upper edge of the wall, fixed to it with the help of metal corners or forged staples.
	The next step along the entire internal, from the attic side, the surface of the skates stretches and fastens to the rafters a vapor barrier film. If it is a one-sided operation, then the inscriptions should be turned towards the attic space.
	Since the installation of the film takes place from the attic side, its fixing starts from the ridge and is produced with an overlap of horizontally stretched fabrics by 150 ÷ ​​200 mm. There should be no gaps between channels, passages for steam passage, so the places of their lapping are sealed with a special waterproof tape.
	Further, the vapor barrier membrane is additionally pressed against the rafters by means of a bar with a cross-section of 50 × 40 mm, which is fixed in increments of 600 ÷ 650 mm. To create a vent clearance, vertical grilles are often attached to the horizontal furring - ventricles. They are mounted in steps of 500 ÷ 600 mm. They are necessary in the event that the attic is internally lined with lining or plasterboard. Securing the inner lathing parts is done using self-tapping screws.
	If rafters and slopes are provided in the rafter system, then in the places where they are fastened to the rafters, the vapor barrier film is carefully cut out, bent and fixed with the help of staples on the rafter feet. Places of its adjunction also it is desirable to glue on top with waterproof tape.
	Further, if it is not planned to immediately cover the attic walls( attic), the work will be carried out from the outside of the structure. First of all, between the rafter legs at the point of their intersection with the Mauerlate is a wooden beam cross-section 40 × 60 mm. It is necessary for keeping the sliding mats from slipping.
	The next step is the insulation of the roof. The insulation must have a thickness of 3 ÷ 4 mm less than the height of the rafters, between which it will be laid.
	If the insulation is laid in two layers, then it should be laid in the decay, that is, the middle of the solid mat should overlap the joint between the two lower ones.
	Windproof waterproofing membrane is stretched from the top of the insulation. Since it is mounted from the outside of the structure, the work starts from the eaves. The horizontal linens are overlapped by 150 ÷ ​​200 mm. Places of lapping, just like the canvas of vapor barrier, are pasted with waterproof tape. Some membranes have a special glue layer, covered with a paper substrate - so it's even easier to work.
	Further, from above, the windproof film is pressed against the rafters with the aid of the grill bars. The next step is to immediately mount the drip, vent strip and holders for the gutter.
	After that, on the counter-rails are fixed boards of the battens with a step of 350 mm between the centers. This distance is observed on the entire surface of the roof slope, except the first to the ledge, and also to the ridge of the board of the crate. Between them and the middle of the next board the distance should be reduced - up to 280 ÷ 300 mm. After completing the installation of the boards of the crate, a curtain rod is attached or tied over the cornice, which will protect the lower edge of the roof from moisture. It should be noted that the cornice can also be fixed on top of the plywood layer. How this happens will be discussed later.
Illustration	Brief description of the operation

	Next, sheets of plywood or OSB slabs are laid on the boards of the crate. Their installation is carried out in a runaway, at the same time, it is necessary to leave a temperature gap of 3 ÷ 4 mm between them. Since the step of the crate and, in our case, is chosen to be 350 mm, there will be enough plywood or OSB with a thickness of 9 ÷ 10 mm.
	Solid plywood flooring is fixed to the crate by means of self-tapping screws, which must be drowned in the flush plywood.
	After fixing a solid layer of plywood, it should be covered with a lining carpet. Here it needs to be clarified that this layer can be spread over the entire surface, and can only along the perimeter of the roof slopes, and this depends on the gradient being given.
	So, slopes of a sloping roof, the angle of which to the horizon is not more than 20 degrees, it is necessary to cover with a continuous layer of lining carpet, since it performs an additional waterproofing function. Fabrics of this material are mounted on a plywood surface, starting from the eaves, the sheets are overlapped by 100 ÷ 120 mm. The top and side edges of each blade are fixed on the plywood surface with special spiked or spiral nails with a cap not less than 8 mm in diameter. The distance between the nails should not exceed 200 mm.
	If the roof has a slope of more than 20 degrees, then it becomes unnecessary to cover the stingrays with a lining carpet - it's enough to cover them with stripes around the perimeter. Nevertheless, many masters still recommend a continuous flooring of the lining layer.
	In addition, in the case of non-continuous flooring, the underlayment waterproofing material must be laid around the vent and chimney pipes, dormer windows, at the joint of the roof with the wall, if, for example, a single roof is being equipped. The insulation material is fixed with special spiked or spiral nails made of stainless material, with a wide flat bonnet.
	The feedthrough through which the ventilation pipe will be removed is smeared with bitumen mastic before installing it.
	Then the feedthrough element is put in place, well pressed and fixed by screws or the nails mentioned above, in increments of 8 ÷ 10 mm.
	If the roof has a complex structure, in which the ramps along the front side are interconnected at a certain angle, the joint between them must be well waterproofed. This joint is called endowa, and it is necessarily covered with a lining mat with overlapping on the slopes of about 200 mm, where the material is nailed to the plywood layer with nails in steps of 100 ÷ 120 mm.
	The illustrated illustration shows the installation of a lining carpet on the front overhang of the roof. For convenience of work execution it is necessary to make a special ladder. Without it, not to do, especially in cases where the installation of the roof is carried out on a rafter with steep roof slopes.
	After completion of the work on the flooring of the lining carpet, you can proceed to fasten the cornice to the overhanging roof overhang. The installation starts with the corner of the roof cornice and the fastening is done by special stainless nails with a wide flat bonnet or the rod is screwed with screws.
	Fasteners( nails or screws) should fix the bar in two rows, in staggered order, in steps of 100 ÷ 150 mm. If several parts of the strip are connected, then they are overlapped by 50 ÷ 70 mm.
	After fixing the cornice, prepare the front. It needs to be adjusted so that it fits perfectly with the cornice. To do this, she is cut with metal scissors.
	After fitting this element, it is fastened to the roof by nails or self-tapping screws. The front bar is always mounted from the eave. If several lengths of the strip are used for decoration, the upper overlap is applied to the lower overlap by 50 ÷ 70 mm.
	On the ridge the bar is also cut at an angle for docking it with the bar of the other side of the pediment.
	After the installation of the cornice and frontal laths, a ridge-roof tile made in the form of a strip is mounted on the edge of the overhang. This element is fixed to the base with an indent from the bottom edge of 10 ÷ 15 mm. Fixation is made by nails, on the bottom and top edge of the strip. They are clogged in a staggered manner, as shown in the illustration. When installing the next row, the nail heads should be hidden under the shingles. If the drainage system has not been installed before, then after fixing the ridge-cornice strip, you can fix the installation of its elements.
	Individual elements of the shingles can be called figured sheets, and before their installation it is necessary to carry out one procedure that will evenly distribute the color shades of the material over the surface of the roof slope. For this, 6 ÷ 8 flexible shingles are opened and the sheets are mixed. Only in this way it will be possible to achieve the ideal color harmony of the roof. The protective film is peeled off from the shingles before mounting. On all sheets and on the ridge-karniznoy tiles in the upper part of the color a line is selected for which you can orientate by mounting the material on the prepared ramp.
	The first row of shingles is stacked from the middle of the ramp to the pediment slats. The row must be located ideally parallel to the ridge-cornice strip, and find it with its petals, closing the hanging fasteners' hats. The adjacent tiles in the row are stacked to each other butt and nailed to the base with nails in steps of 150 ÷ ​​200 mm.
	The last sheet is measured in place and cut with a construction knife.
	Having reached the frontal lath, its metal part, located on the roof slope, is smeared with mastic, on which the extreme element of the tile is fixed. And, in all subsequent series, the same fastening process is performed.
	In this illustration it is well shown how the outer sheet of the tile is laid on the applied bituminous mastic.
	The second row is also mounted from the middle of the ramp, and the tile sheets are shifted to one side by half the petal. This tile model is fixed in such a way that the lower edge of the petals is located at the level of the upper edge of the cutouts in the bottom row.
	To ensure that the following rows do not leave the horizontal, and the petals are located vertically, a pier from the cord is hung on the roof slope and vertical vertical lines are drawn along it.
	For ease of work at a height, scaffolds are fixed on the ramp. In order not to damage the tile, they are fixed under the petals. After completion of the work, the scaffolds are dismantled, and the raised petals are adhered to the bituminous mastic.
	Elements of flexible tiles are trimmed at the location of the passage for the ventilation pipe and are glued to the bitumen mastic applied around it. It is very important to make a perfectly smooth cutout in the shingles, otherwise the frame of the pipe will look sloppy.
	This illustration shows clearly how the material should be laid from the bottom of the aisle.
	And in this figure the completed work on the installation of soft tiles around the ventilation pipes passing through the ramp is presented.
	After all the material has been fixed on the roof slopes, it remains only to properly shape the skate. For this purpose it is recommended to use a special one-piece aerator, for example, such as the company "Technonikol" offers.
	Roof aerator is necessary for ventilation of the roof and attic space of the building. Due to the good circulation of air masses, in the attic space, on the wooden parts of the rafter system and in the thickness of the insulation, moisture will not accumulate, which means that the risk of mold can be eliminated.
	Although good air circulation will be ensured, the aerator will also become a reliable protection for the ventilation gap in the ridge from penetration of various insects and from atmospheric precipitation and debris, as its thoughtful design will create a reliable barrier.
	In order to allow air masses to freely circulate, a ridge is cut in the ridge part of the roof using a jigsaw, with a width of at least 20 mm.
	If the installation of the aerator is envisaged in advance, the ventilation lumen can be fully equipped even when installing the rafter system, when installing ridge runs.
	The ventilation lumen can be cut along the whole length of the ridge or in its central part and be only 500 ÷ 1000 mm in length. Depending on the length of the ventilation outlet, the required aerator model is purchased.
	The aerator is nailed along the edges to the roof rails with nails or fixed with self-tapping screws.
	The surface of the aerator can be decorated with tiles, which is fixed on top of it on bituminous mastic with additional fixation by fastening elements - nails or screws.
	If the aerator is not installed over the entire length of the ridge, the rest of it is covered with ridge tiles laid overlapping by 50 mm, and fixed also with the help of nails with wide hats.
	If there are large eaves in the rafter system, it is recommended that they be immediately filed. This is done in two ways. The lining can be fastened to the rafters on their lower edge, as shown in the illustration.
	The second option - the filing is at a right angle to the wall of the house. If this option is chosen, then it is necessary to make a frame structure under the roof overhang to fix the lining( siding), approximately as shown in the illustration. When installing the finishing material, it is necessary to keep in mind that ventilation should be arranged under the overhang. For this, it is possible to leave gaps of 5 ÷ 6 mm along the wall. Another option is to fasten several perforated sheathing flaps( spotlights). As in the first and second versions, it is recommended, before installing the finishing material, to fix on the ventilating airs an mosquito net that will keep falling under the roof slope of harmful insects. This element is optional, but highly desirable.
	Brief description of the operation performed

The third column of the table shows the thickness of the board, since a continuous crate under the soft roof can be made from boards, nailingthem closely, without a lumen.

By the way, pay attention to one more nuance. There is an opportunity to think in advance of the design of its rafter system and additional lathing. Perhaps, in some cases( for example, the step between the rafters is 600 mm), it will be much more rational to increase the thickness of the plywood by just 3 mm( from 9 to 12 mm), but at the same time do without installing an additional lathing,foot counterbrook to create an air gap. In a word, it is necessary to calculate in advance possible benefits of these or those variants.

Installation instructions for roofing with soft bituminous shingles

Detailed instructions for installing soft bituminous shingles on a pitched roof are shown in the form of an illustrated table:

How to properly insulate a pitched roof?

The question of the thermal insulation of the roof slopes in the instruction table is mentioned only casually. In fact, creating a warmed roofing cake is a serious and complex task, requiring certain calculations and taking into account many nuances. How to properly to heat a pitched roof with your own hands - read in a separate publication of our portal.

Continuation of the instruction table:

Correctly mounted coating will serve without additional maintenance for many years, keeping the structure from moisture and cold air. But, as can be understood from the descriptions of the entire process of roofing, they are quite complex and dangerous, since most operations will have to be carried out at altitude.

Therefore, if the experience is small and there are doubts about their abilities and capabilities, it will be more reasonable to entrust the arrangement of the roof to specialists. And the instruction here will also serve a good service - it will be possible with knowledge, without looking like a layman, to monitor the conscientiousness of the work of the construction team.

To finalize the publication - a visual lesson on the installation of flexible bituminous shingles:

Video: Installation of roofing with bitumen tiles " SHINGLAS"