Additional elements, in particular for the roof, can increase its strength, tightness, extend the life of the structure, as well as decorate the building from the outside.
The main material for their manufacture is steel (galvanized or polymeric).
Important: experts recommend buying such components together with the main ones or selecting individually if the roof is already installed.
Varieties of additional elements
The most common components are:
- Little horse. It is also called the bar. It is installed at the intersection of slate sheets or other materials. The main function is to make the roof stiff and prevent moisture from getting inside. Also, the skate is able to prevent the formation of condensate and slow down the wear of the structure. There are flat, semicircular and figured types (for example, trapezoidal). Components for it are various connectors and tees for joints. The set also includes various plugs (conical, tent and flat).
- The corner. Such an element is installed between the slopes of the roof sheets. The main purpose is to drain water from the joints.
- Planks of the upper and lower valley. These corner structures are also installed at the joints of the roof and perform a protective function.
- Small and enlarged cornice strips protect slings from moisture. They are mounted under the main roofing prior to installing the gutter and covering with the leading material.
- End and wind planks. Are established at the last stage of a covering of slings. Designed to protect the structure from wind and bad weather conditions.
- Snow retention. The installation of this device is not mandatory, but in some cases it can protect the health and life of people from sliding snow masses.
- Ventilation elements and chimneys. The various conclusions of communications on top of the roof are also equated to additional elements.
- Laths (adjoining, connecting and finishing) are also important for coverage.
Specifications
The manufacture of additional elements, for example, such as a ridge knot, requires special attention. An important feature is that the above devices can be made in various shapes and sizes. So, the standard ridge element has a length of 2 meters, and a semicircular one is made with a radius of 70 to 125 mm.
After the acquisition of such a component, it is not necessary to trim the excess end, because the removal of the wing of the ridge should be at least 115 mm.
The dimensions of the bar of the wind wing are at least 100 mm.
Despite a fairly wide range, manufacturers make any designs according to the wishes of the customer.
What to consider when choosing additional elements of the roof
First of all, you need to pay attention to such points:
- The various elements of the appendage have their purpose and are by no means interchangeable.
- One and the same type of devices can have several versions or modifications at once.
- When selecting, it should be borne in mind that the additional material should be identical to the roofing material.
- To facilitate the selection, a roof design should be made.
- If the roof has an unusual shape, it is possible to manufacture any item to order.
Which roof structures are better?
It is impossible to determine with accuracy which additional elements are optimal.
The selection of certain components depends on the main coating material:
- If such is slate, then galvanized steel products will be most suitable.
- Special elements are offered for Euro Slate, which are made with a bend of 20 ◦ (for the best fit).
- Roofs made of bituminous shingles are suitable for steel doborki with polymer coating, as well as plastic components.
- If the roof is made of natural tiles, you should select accessories from the same material.
- Additional elements for corrugated board are presented in the widest model range, for this reason they do not require special efforts in the search and selection.
- Compounds for composite tiles are made of steel and covered with crumbs of the corresponding color, so it is best to make the selection of components before installing the roof.
Mandatory additional elements for new buildings. Features, advantages and disadvantages
For old houses, such devices are not necessary at all, because the roof structure provides for natural ventilation. If we are talking about new buildings, then much attention should be paid to the additional element - an aerator.
Despite a wide selection of structures that protect the attic from moisture, it partially gets inside, where it gradually accumulates. To dry the rafter system in many coatings, an aerator is installed.
Its design is outwardly similar to a chimney, and among the advantages distinguish:
- regular ventilation of the roof;
- removal of excess moisture and condensate;
- prevention of defects on a flat roof.
Such a device works on the difference between internal and atmospheric pressures. The cap of special design is able to increase natural traction. Thanks to these features, the device works more efficiently.
Important: steel aerators are able to perform their functions in a wide temperature range from minus 50 to +90 ° C. Continuous ventilation systems are installed on large areas.
Mounting elements
Before purchasing components, it is necessary to take into account the roofing material, dimensions, type and the need to install related structures. At the installation stage, it is important to determine in what sequence the elements should be installed. For example, you need to pay attention to the following points:
- The skate should be installed at the final stage.
- It is very important to observe the correct installation of heat and waterproofing of the roof using additional elements (sandwich panels).
- Do not lay extra layer of sealant or sealing material.
- The wind bar should be as wide as possible.
The installation of the roof, as well as the installation of individual extensions, is a very complex and responsible process. The further atmosphere in the house, as well as the life of the materials will depend on the build quality. To avoid improper installation, it is better to entrust the roof to professionals.