Metal roofing - SNiP, which describes the requirements for the material and the technology of its installation

Government standards are developed with one goal - for manufacturers to offer high-quality goods and services to consumers. In the construction sphere, SNiPs (codes of norms and rules) act as standards. In this article we will deal with the SNiP for roofing of metal, corrugated, soft roof. We will talk about what is included in this document, what points it affects, and whether it is strictly adhered to when building roofing structures.

For whom are the SNiPs

intended that there are no separate sets of rules and regulations for each type of roof. There is one document under the number of the joint venture 17. 13330. 2011 and under the name "Roofing". It is mainly used by architects and designers. Builders in the construction of roofing structures use a different document - "Rules of production and acceptance of work."

Why is this happening. The fact is that builders build any structures or their parts according to the approved project. They do not have the right to deviate from his demands. You can revise the project, given the nuances of construction, but for this to happen, the document must pass a certain path, where the opinion of the expert commission is taken into account. That is, the revision of the project is not a quick process.

But what I wanted to say about roofing materials and equipment on the roof. What is a standard in construction are certain limitations in the actions and use of certain building materials. As life shows, scientific and technological progress does not stand still. Every year a huge number of new products are thrown onto the building materials market, in which the installation technology is different from others. So what's the point of talking about the standard, regulations and rules.

It is clear that during the Soviet Union, when the roofs were covered with slate, roofing material and galvanized sheets Other materials were simply not even in the plans, it was possible to talk about the standardization of roofing work. Because both in Yakutia, where frosts fall below -60C, and in Central Asia, where the heat passes over the + 60C line, the same typical houses were built without taking into account the climatic conditions.

Today, when a flood of new technologies has poured into the Russian market, it is difficult to make any decisions in terms of the rigor of roof construction. And yet the roof SNIP acts, which means that many projects are manufactured on its basis.

In 2011, the code of rules and regulations of Krovli was modified to reflect exactly new building materials and technologies. The developers tried to solve a number of actual problems, which was not so easy. Therefore, in this document, some sections are marked with the heading - "recommended". That is, it is no longer a strict law, it’s just a tip on how to do better this way.

However, it should be noted that some recommendations are very doubtful. For example, about sealing joints of floor slabs. For a long time no one has used bitumen or tar for this. Or that in the construction of certain types of roofs, especially flat ones, it is necessary to use expansion joints. There is no such thing in SNiP. The same applies to the ventilation gaps of pitched roof structures. That is, the document in its recommendability uses outdated technologies, which is not acceptable in modern construction.

Is compliance with the rules and regulations of the “Roof”

Theoretically, it is necessary to comply with this document. Because it is a state legislative act. On the practical side, not all of its items are useful in terms of building technologies, especially those that appeared relatively recently. Therefore, even the selection committee often conducts acceptance of erected buildings and structures from a position of common sense.

In addition, it should be added that the Roofs SNiP is a complicated document in the structure that experienced designers and builders can figure out. At the same time, it mainly takes into account standards concerning flat roofs of large-span buildings. This legal document is useless to private developers. The construction of the roof, they should conduct the drawings, which are developed by designers. If there are none, then according to the recommendations given by manufacturers of roofing materials.

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What is included in the Roofs SNiP

Since the basis of the topic of the article is the roofing system SNiP, it is necessary to indicate that this document discusses the technology of attaching roofing materials to the roof framing.Each section describes the technology of installation and mounting of one or more materials. For example, in the section under the number "5" rolled and mastic roofs are disassembled. What specifically is written here:

• what materials are used to cover this type of roofing, there is a specific listing of them;

• laying type roofing carpet: under the heat-insulating layer or above, the recommended number of waterproofing layers is also indicated here;

• base types for roofing material: floor slabs , screeds, heat-insulating plates, solid obreshetka;

• a table is given that shows the ratio of the angle of inclination of the roof and the temperature resistance of the roll or mastic ma the material;

• specifies nuances of material choice and its laying technology for existing and unexploited roofing structures;

• advice is given what materials according to the degree of flammability in which roofs can be used with regard to fire safety requirements;

• recommendations for areas of adjoining roofing material are described;

• several items consider the so-called " green roofs ".

That is, in fact, the output is quite important and helpful. This is especially true of small at first glance nuances concerning the competent installation of roofing material.

It is necessary to add that the service life of a soft roof is not determined by SNiP. That is, there is no such data in this document. They should be sought from the manufacturer, usually indicated in the passport of products.

Corrugated sheet and piece elements roofs

This is section number "6". It starts with two tables. The first one shows the ratio of the angle of inclination of the roofing system from the chosen piece tile material. In the second, the requirements for cement-sand tiles.

Here below are the requirements for the lathing, lathing and truss system: lumber pitch, section. Specifically, numerical values ​​are not given, but there is a link to SP 20. 13330. As well as links to the applications that are presented in the SNiP below.

A separate section under the number "6. 2" covers roofs of shingles. Or rather:

• type of batten , from what materials it is collected;

• pitch and section rafters (given table);

• type of the lining carpet .

There is a link to the appendix "L", where examples of solving the details and assemblies of the roof of this type are examined.

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Under the number "6. 3" is the point about the roof of tiles. Here is indicated the type of crates, waterproofing and methods of fixing the roofing material.

The item "6. 4" is about fibrous roofing materials, and profiled including. Specifically, recommendations are given for each type of roofing, taking into account the type of sheathing, laying of water-repellent layer, methods of fastening and laying. But nothing here is said about profiled sheeting and metal tile.

The document sends to the application "Z" (this is a letter, not a number), which has the following name: "Cover (roof) with a roof of piece materials and corrugated sheets." It simply gives diagrams of how to properly carry out the installation of the above designated roofing materials.

There are two more applications where rules and regulations are specified:

1. Appendix "H" , which offers examples of solving parts from corrugated sheets, profiled including. Here we consider schematically the ways to cover the ridge of the roof (deaf and ventilated), endovy, compensatory joints, how to properly mount to the metal and wooden crate, at the junction areas.

2. Appendix "P" . Here all the same schemes as in the previous section are examined, only this concerns metal tiles.

That is, these three applications in the Building Code relate to corrugated roofing and metal tiles. There are no other references to these two currently popular roofing surfaces in this document.

Roofs from metal sheets

This is a section numbered "7", which refers to a folded roof. That is:

• which metal roll materials can be used for this;

• as they should be properly mounted ;

• with fasteners ;

• type of grating ;

• sealing of joints .

Drainage from the roof and snow retention

This is an equally important section under the number "9". That is, the external drain from the roof in the SNiP is marked with a separate part. Here, the points are the requirements, how to install the drainage system of buildings, what requirements are imposed on the material, construction and execution (external or internal).

Literally, there are literally a few points on the snow guards that are advisory. In this case, only tubular models are specified in SNiP.

The video shows how to properly install the drainage system according to the building code and recommendations from the manufacturer:

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Conclusion on the topic

So, the article addressed the issue of the set of rules and regulations regarding the construction of roof structures. It is necessary to remind once again that almost all the positions of this document are recommendations, especially for applications where it is written in brackets: recommended application. That is, it can be taken as a basis, but you can not take it.