Roofing iron on the roof: installation instructions
Finishing the roof with roofing iron is a rather complicated process. The final result of the resulting coating directly depends on compliance with the material installation technology. How to cover the roof with roofing iron with your own hands, we will consider further.
Varieties, features and advantages of roofing iron on the roof
Roofing iron is called materials for the manufacture of which metal rolling is used. There are a large number of forms of release of roofing iron:
- rolls;
- sheets.
Both a polymer and a galvanized coating are applied to the metal surface, protecting it from external irritants.
The popularity of the use of roofing iron is primarily due to its low cost and excellent performance. The release of certain types of iron is controlled by special documents, so the thickness of the black roofing sheet material should not be less than 0.3 mm and more than 0.8 mm. To protect the metal from corrosion, it is treated with zinc on both sides.
In relation to the type of zinc coating of iron, it happens:
- iron, the thickness of the zinc coating in which is up to eighteen microns;
- material, with a zinc coating thickness of up to forty necrons.
Please note that the type of coating and its thickness directly determine the quality of the product, the thicker the layer of zinc applied to the surface, the longer the iron will be protected from corrosion.
For the manufacture of roofing iron, high-quality carbon steel and the cold pressing method are used. Application of galvanizing is carried out in different ways, while zinc of different categories is used. In order for the coating to better adhere to the surface, substances in the form of aluminum and lead are combined with zinc. Thus, the coating becomes more durable, smooth and, most importantly, not subject to corrosion.
It is galvanizing that is the simplest and most reliable option that protects the metal from corrosion. To apply the layer, the previously prepared metal is immersed in a pre-molten zinc composition. Depending on the thickness of the resulting layer, the coating is first-class and second-class. The material that belongs to the first class has a higher cost, but at the same time, its service life is more than 25 years. The material of the second class is cheaper, although it will serve its owner for no more than ten years.
In addition, roofing iron is coated with a combination of zinc, cerium, lanthanum and aluminum, this coating is called galfan. Iron, on which this coating is applied, tolerates mechanical damage well, resists corrosion and is resistant to deformation.
Another option for coating iron is an alu-zinc layer, consisting of zinc, aluminum and silicon additives. The combination of these substances contributes to the acquisition of high anti-corrosion properties by iron, improves the duration of its operation by three to four times, since due to the presence of silicon, the coating is retained on the iron surface much longer.
Another common option is to apply a polymer coating to the metal. With its help, iron acquires any color and shade. This version of roofing iron is the most common due to its combination of the optimal cost of the material with excellent performance and attractive appearance.
The sheet of roofing iron has the form of a multi-layered sandwich, consisting of a steel base, zinc coating, a passivating layer, soil and polymers. For the manufacture of the last layer, substances are used in the form of polyester, plastisol, pural, which give the roof a glossy or matte sheen.
Roof iron photo:
To equip the roof, both smooth and profiled types of metal are used. There are a large number of varieties and forms of roofing iron:
- metal tile;
- corrugated board;
- steel slate type, etc.
Among the advantages of finishing the roof with metal are:
- excellent bearing characteristics;
- resistance to corrosion and deformation;
- resistance to aggressive chemicals;
- resistance to ultraviolet;
- ease of installation;
- maintaining a presentable appearance over a long period of operation.
Among the wide variety of options for roofing iron, metal tiles and corrugated board remain the most popular. This is primarily due to the presentability of their appearance and good performance.
Mounting on the roof of galvanized steel with a smooth finish is possible, however, it will make the building boring and mundane. In addition, the installation of this material requires special skills in working with the tools that connect it.
Also, aluminum, copper, zinc-titanium finishes are installed on the roof, but their cost is very high, in addition, they need special care.
If you plan to install profiled types of iron on the roof, then to perform this action, it is enough to study the instructions. But to install a standard galvanized iron, you need to work very hard, having previously studied the instructions on how to do this.
The most important rule for the quality installation of a galvanized iron roof is to ensure its tight connection, through which neither snow, nor rain, or even wind will penetrate. This type of connection is called folded, there are two types of it:
- recumbent;
- standing connection.
To perform the connection between sheets of iron in the transverse direction, the first option is used, and in order to connect the material longitudinally - the second.
If this rule is neglected, then the water that should flow down the roof will linger on it.
In order to learn how to cover the roof with iron using seam joints, it is necessary to prepare the following materials in the form:
- workbench, with a strong steel corner on it;
- hammer;
- mallets;
- caliper;
- metal scissors.
On a steel sheet, the bending point should be marked, then the edge is bent with a wooden mallet. Turn the sheet over to the opposite side and make the edge become U-shaped. Take the second sheet, fold it over and place it in the gap that formed on the first sheet. A metal hammer will help fix the sheets together completely.
Please note that this process requires special skills from its performer, therefore, before carrying out work, we recommend that you practice. An improperly made connection will lead to the fact that moisture and cold will enter the attic through the roof.
Before you make an iron roof, you should study a large amount of information from various sources.
How to cover the roof with roofing iron
Before starting the laying of roofing iron, it is necessary to cut it into measured sheets. In addition, if there are dents, they must be straightened out. Start work from the bottom, gradually moving to the top. Do not forget about the allowance, which is 15-20 cm, with which the storm system is mounted.
There are two ways to connect steel to each other:
- folded;
- the use of self-tapping screws.
The second option is simpler and easier to implement than the first. However, with this installation, the iron sheets are overlapped, so the consumption of materials will be much higher than with a seam connection.
In addition, holes should be made for the installation of self-tapping screws, which in the future will allow water to pass through. More popular is the seam connection. It is with its help that the sheets are interconnected most tightly.
With a lying connection, the crest of the fold is directed to the side on which the ramp is located. With the help of standing joints, vertical stiffeners are formed. In relation to the number of bends, there are: one- and two-fold types of folds.
The seam method of connection involves the use of clamps, which help to fix the iron on the surface of the crate. These elements are metal strips, for the manufacture of which the rest of the material is used. One part of the clamp is bent by two or three centimeters, it is connected to the crate, and the second part must be connected to the standing seam.
In order to bend iron, it is recommended to use a special hammer or pliers. Please note that the height of all ridges must be the same, in addition, they must be well sealed and treated with sealant.
How to cover the roof with iron: installation features of galvanized steel
1. Be especially careful when working with this type of material, since the slightest damage to the galvanized layer will lead to the development of corrosion on the entire sheet.
2. When transporting sheets, be sure to wear protective gloves. They will protect your hands from being hurt by the sharp corners of the iron.
3. If you want to cut the roofing material into pieces, it is best to use metal shears. It is not recommended to use a grinder for these purposes, as it contributes to strong heating of the metal and damage to the zinc coating.
4. To build the main part of the roof, use roofing material with a thickness of about half a centimeter, and to equip the eaves, gables and gutters, it is recommended to use a thicker material.
5. The material is laid on the previously prepared roof. To do this, you should carry out the equipment of a wooden crate. To build it, you will need a beam, the laying step of which is 200 mm. On the eaves and valleys, the timber is laid close to each other.
6. To fix the flat material, it is necessary to have special equipment that allows you to build folds. To install profiled iron, it is enough to use self-tapping screws and special gaskets for them.
Roof iron installation technology
If possible, buy galvanized iron in proportion to the total area of the roof. That is, one strip must completely cover one slope, since connecting a strip of parts is a painstaking and time-consuming task.
Please note that transportation of such material is often problematic. In order to calculate how much material is required for work, you should initially determine the area of \u200b\u200bthe roof.
If you plan to use a double flange connection, then the total area of \u200b\u200bthe material must be increased by one and a half times. In addition, 10-15% is added to compensate for waste.
In addition, for the arrangement of more loaded areas, such as overhangs and gables, a material with a slightly greater thickness will be required. If the iron is mounted on the surface using self-tapping screws, then its amount should be increased by another 15%, in addition, you will need to buy self-tapping screws. For one square meter of roof area, you must purchase at least 4 self-tapping screws. Please note that under the screws, you will need elastic gaskets that will improve the tightness of the connection.
If the roof slope is more than twenty degrees, then sheet material without profiling is suitable for its arrangement. The process of laying iron will have to check the roof for evenness with a level.
Please note that if there are irregularities in the rafter system, after the installation of the iron, they will appear and spoil the appearance of the roof. After checking the rafters, the crate is attached. There are two options for doing it:
- solid - the use of edged boards;
- sparse - use of timber.
On overhangs, cornices, the crate should only be solid. Before installing the iron, it is necessary to lay the roofing material, which acts as a waterproofing agent.
To cut iron, use ordinary metal shears or their electric version. The cut blanks are aligned and their edges are bent to create a gutter-like element.
How to cover the roof with iron video:
