Roofing profiled sheet has become widespread among modern roofing, which are used in private construction for roofing and in industrial construction as a finishing coating. We will tell you more about this material and the features of its application and fastening to the roof in this article.
What is a profile sheet?
A building material with an acceptable price - the profiled sheet is made by rolling from galvanized steel. There are several manufacturing options:
- without cover;
- with a polymeric, color coating.
Thus, metal sheets are produced having a different shape:
- wavy;
- ribbed trapezoid.
The first form is most popular in modern construction when performing roofing work.
Profiled sheets are adapted for use in adverse conditions:
- In contact with water, the material does not corrode;
- When interacting with the sun's rays does not fade.
Attention. To obtain an exquisite roof finish, it is best to use profiled sheets with a colored polymer coating.
Performance characteristics
The popularity of profiled sheets is explained by their excellent performance. Perhaps they include:
- relatively low cost;
- high fire-fighting properties;
- simplicity and convenience of laying on the roof;
- lightness of the material;
- versatility.
The advantages of profiled sheets also include:
- resistance to fading;
- resistance to corrosion and temperature changes.
The profiled roofing sheet is extremely functional - the dimensions prove this in the best way. Profiled sheets are produced with various profiling depths: from 15 to 35 mm - roofing profile; from 44 to 130 mm - bearing profile.
Attention. In this regard, the marking of the material differs. There are no standard designations, each manufacturer puts its own marking. Basically, sheets marked H, HC and different profile heights are applicable for roofing.
Roof application
Of no small importance in the construction of a roof from a profiled sheet is the minimum slope of the slope.
In addition to the fact that the material has high mechanical strength, operational reliability, light weight, aesthetic appearance and low maintenance costs, it can be used on roofs with a slope angle of at least 8 degrees.
Profile sheets are used:
- in civil engineering;
- in industrial facilities of a large area.
Decorative polymer coating allows the use of materials in low-rise, individual construction.
If we compare the technological characteristics of profiled sheets with other roofing materials, then metal tiles can be put on a par with them.
The difference lies in the fact that the minimum slope of a profiled sheet roof is, as we have already said, 8 degrees, and metal tiles - 14 degrees.
Material calculation
It is desirable for the roofing device to select profiled sheets so that their length corresponds to the length of the slope. This contributes to the exclusion of transverse joints on the coating, which reduces labor costs for the device and increases the moisture-proof properties of the roof.
The length of the profiled sheet is equal to the length of the slope, it does not exceed 12 m. In the event that the slope is longer than the specified size, then a composite slope is equipped. At the same time, profiled sheets are interconnected with a horizontal overlap of at least 20 cm.
In this case, it is necessary to start laying from any lower corner so that the subsequent roof element covers the previous one. For reliable operation, the joints are filled with sealants.
Before calculating the material for the roof, you must calculate:
- building perimeter;
- slope length.
Advice.It is better to entrust the calculation procedure to the manager of a trading company, who, using a special software package, will calculate not only the consumption of profiled sheets for the roof, but also the number of additional and fasteners.
Installation of profiled sheets
The installation technology of profiled sheets is quite simple. . In this regard, in most cases, do-it-yourself roofing from a profiled sheet is equipped.
At the same time, it is considered a positive factor that installation can be carried out all year round:
- at any temperature, the sheets are well cut;
- material waste is kept to a minimum.
When working with profiled sheets, it is necessary to adhere to certain features and rules. Of great importance for laying sheets is the slope of the roof from the profiled sheet:
- Tilt angle 14 degrees - material overlap 200 mm;
- Slope from 15 to 30 degrees - sheet overlap 150 mm;
- The slope exceeds 30 degrees - an overlap of 100 mm is allowed.
Attention. It should be noted that roofing with a slope of 12 degrees or less with profiled sheets is carried out with sealing of the joints of vertical and horizontal overlaps.
Fixing sheets
The fastening of the profiled sheet on the roof is carried out on the lathing structure, which is mounted on the truss system. Profiled sheets are relatively light in weight, so there is no need to strengthen the base for this material.
To fix the sheets to the wooden crate, special self-tapping screws with a rubber gasket are used. Fastening occurs in the deflection of the wave.
For this, the following screws are used:
- on the total area of the base - length 35 mm;
- when roofing units from a profiled sheet are attached - 80 mm.
Before fixing the main covering, it is necessary to provide the roof with:
- waterproofing;
- warming;
- vapor barrier;
- ventilation gap.
Together, all these elements will contribute to the durability of a dry and warm roof space.
Let's take a closer look at the main points of fastening when roofs from a profiled sheet are being equipped - nodes:
- Profiled sheet for the roof itself must be positioned so that the fastening is carried out at the points of junction of the deflection to the lath of the crate.
- Fastening is carried out in each wave on the upper and lower slats, since these sections of the roof account for the wind load.
- In the middle part of the slope, fastening through the wave is permissible.
- The fastening step on the longitudinal slopes is 300-500 mm.
- Along the edges of the roof, the sheets are fixed into each plank of the crate.
- In joined waves, it is necessary to shift the fixing points by 5 mm, this will ensure a better fit of adjacent sheets.
Advice. The connection of the extreme shelves of the sheets is preferably carried out using rivets with a diameter of 3.2-6.5 mm. Such a connection is made with a riveting tool.
Lathing for profiled sheets
Due to the fact that the profiled coating is attached to the crate, I would like to pay some attention to this structural element of the roof:
- The crate under the profiled sheet is laid on the waterproofing layer;
- The crate is made from a bar, the approximate section is 50x50 mm;
- From the ridge of the roof to the cornice, a counter-lattice is constructed, in the form of bars, wooden planks are attached to it in the horizontal direction;
- For installation of profiled sheet on the roof the optimal size of the boards of the crate is 32 x 100 mm.
The slope of the roof and the height of the profiled sheets affect the size of the crate:
- When using sheets with a profile height of 20 mm, a continuous crate is prepared on a roof with a slope of less than 15 degrees;
- The crate pitch is 500 mm, if a profile with a wave height of 44 mm is used, it mainly refers to roof material marked H;
- With an inclination of more than 15 degrees, the pitch of the crate is from 350 to 500 mm. Depending on the wave height with which the profile is applied.
Attention. At the ends of the roof for the crate, planks are installed, the height of which exceeds the height of the main boards by the height of the profiled sheet.
Profiled sheet roofing is distinguished by its lightness of construction and ease of installation, wear resistance and excellent tightness, which is why it is so extremely common in modern construction.
This once again confirms that among all roofing coverings, the consumer prefers the best option in terms of quality and price.
So, if you need to give an old roof a beautiful look or cover a new roof, profiled sheets are certainly the leaders among analog materials in terms of installation speed, availability of purchase, practicality and reliability in operation on roofs with various slopes and environmental influences.
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