Each owner of a country house, small or large, wants his home to look not like a summer house, but like a mansion, which, in addition to the interior, will surprise guests with its appearance. The roof is directly related to the appearance of the building, the more complex its configuration, the richer the external design of the whole house looks. In this article we will tell you what are valley roofs.
The concept of a valley
The term valley refers to the internal corner of the roof, which is formed at the junction of two slopes. This structural element is a key node in the construction of the roofing system.
The valley is subject to significant loads, since it, more than other elements of the roof, is exposed to precipitation.
Such factors determine stringent requirements, both for the quality of roofing materials and for the technologies used to build a valley roof. Special attention is paid to its device, whether it is a roof:
- cruciform;
- hip;
- gable;
- tent.
Attention. Any errors in design or construction can lead to damage to the roof - from grooves to the collapse of the entire roof structure, for example, as a result of the accumulation of large amounts of snow.
roof sketch
By designing a structure like four-pitched hip roof, it is necessary to strike a balance between design and functionality of the structure. If we consider this issue from an engineering point of view, we can draw the following conclusion: the simpler the roof structure, the less hassle it will be during its construction.
When designing a roof with a large number of valleys, it is necessary to develop a roof plan taking into account the main sections, elevations and dimensions of the building.
To do this, the house is mentally divided into rectangles, the largest of which is the main room, and the smaller ones are extensions.
Departing from the line of the walls, the perimeter of the roof is depicted on a scale. When connecting the junction angles of the main roof and additional buildings, a valley line is formed, that is, the inner corner of the intersection of the roof.
Modern houses are most often distinguished by a t-shaped roof, during the construction of which there is no particular difference between diagonal and valley rafters. If you look at them from the side of the pediment, then the base for the valleys is a little longer and loaded in a different way.
Therefore, the design and installation of the valleys is carried out according to the same technology as the ordinary truss system, only special attention must be paid to their correct projection and fastening of the slopes to each other.
Flooring device
The valley roof provides for a wooden flooring under the groove. For this, an edged board treated with an antiseptic is suitable.
Its thickness is equal to the thickness of the counter-lattice, the width is 30 cm from the axis of the groove. The rallying of floor boards is carried out on rafter legs.
Groove laying
Valley + roof - these are two inseparable concepts if your roof project has a junction of several slopes. When laying the groove, pay attention to the following points:
- The groove of the valley is laid up to the device of the crate.
- After laying it, the edges of the crate are attached to the flooring.
- The ends of the bars are brought to the flanging of the groove.
- When laying, it is necessary to bend the corner of the groove a little more than the corner of the valley
- Laying is done from the bottom up from the eaves;
- Trimming the inner corner is carried out with a margin of about 3 cm for the gutter.
- The groove is fixed to the flooring of the valley with the help of roofing nails.
Attention. When fixing the groove, make sure that it does not move longitudinally.
- When installing several grooves, the minimum overlap is 10 cm;
- The transverse ribs are aligned when laying.
- The edges of the grooves must be pasted over with a foam strip having a water-repellent impregnation. This will protect the valley from water, snow, leaves, and dirt getting under the roofing material.
Valley coverage
The roof is a valley, as we said, a vulnerable element of the roof. It should be protected from the weather as much as possible.For this, end rolled carpets are used.
If the valley has a slight slope, then the coating must be carried out in 4-5 layers, in which three layers are connected to one another. The top layers are attached along with the pitched canvas. Adjacent canvases overlap by 100 mm.
If the slope of the slope exceeds 15%, then three layers are glued on top of each other with a mating in a fork on the slope of the valley.
A groove up to 600 mm wide is covered with long carpets, and a wider one can be pasted over with pieces of a roll covering of arbitrary length. In this case, the laying of layers is carried out transversely to the valley.
Attention. The sticker of the carpet is carried out towards the watershed from the drain funnel.
In any construction, we are guided by fashion trends. Even if it is not as changeable as the fashion of the clothing world, but once every 10 years there are changes in configurations. hip roof, technologies for its arrangement, the use of various roofing and additional accessories.
But over the years, the fashion for the quality of roofing work never goes away, which is the key to the reliable operation of the roof and the durability of the house.
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