The onduline roof has recently become more and more popular with private craftsmen and professional developers. This is due to many factors, among them it is worth highlighting the acceptable cost and ease of installation. Installation work will be within the power of even a novice master who does not have sufficient experience in roofing. But first, of course, it is important to familiarize yourself with the features of the installation. Otherwise, the roof will not last long, and effort, time and money will be wasted.
Ondulin is available for sale in the form of tiles or slate sheets. The basis is cellulose fiber, which is impregnated during the manufacturing process with special resins or bitumen. Processing is carried out at high pressure, while the material is heated to a temperature of 130 degrees. The result is sheets that are waterproof, long lasting and can be installed at any angle of inclination.
Ondulin is biologically inert;mold and fungus. This coating is resistant to ultraviolet radiation, does not fade during operation. An ondulin roof is also popular for the reason that it is light in weight, so it can be used for lightweight structures. You can lay the material on the old roofing by equipping the lathing system to begin with.
Preparatory work
Installation of the roof with ondulin can only be started after you have managed to determine the type and amount of material to cover. You can do the calculation yourself. Depending on the angle of inclination of the slope, the coating technology will change, in particular the design of the crate. This is determined by the snow load, which increases with sloped roofs.
If the slope angle is not more than 10 degrees, then the material is laid on a continuous crate. The transverse overlap of the sheets in this case should be equal to 30 centimeters. Edged board or plywood can be used as a base material.
We cover the roof with ondulin only after the frame system is equipped. It can be sparse and is used when the angle is between 10 and 15 degrees. The distance between the rails in this case can be approximately 45 centimeters. The length of the joint should be equal to 20 centimeters. With a steeper slope, you can equip the crate, the distance between the elements of which will be 60 centimeters. In this case, the joint should be equal to 17 centimeters.
For reference
Despite the fact that the manufacturer advises stylingondulin without waterproofing with a significant slope angle, experts recommend not to abandon this layer. In this case, it will be necessary to create a ventilation gap. This will ensure the durability of the structure.
Features of mounting the frame system
With a slight slope, which is 5-10 degrees, a continuous crate is equipped, between the components of which it is necessary to leave a gap of 3-5 millimeters. For the ridge and the valley, boards are laid that are laid on the rafters. On each side, the distance should be equal to 25 centimeters. Even with a slight slope on the roof overhang, it is necessary to fix an additional bar, sometimes it is made solid by 0.5 mm. However, these recommendations cannot be found in the instructions. Ice and snow will accumulate from the edge of the roof in spring. It is this factor that determines the listed requirements.
Before you cover the roof with ondulin with your own hands, you need to determine the slope of the roof, which should not be less than 1/11. Such a system should be covered with welded roll waterproofing. If the frame components have the same thickness, then two wooden bars will speed up the work, the length of which will be equivalent to the internal distance between the crate components.
The quality of the frame is not so important, since ondulin fits perfectly on roofs with an uneven surface. Under such conditions, the asbestos slate would be covered with cracks. Bitumen-cellulose sheets will lay down onform of construction, performing its function. But at the same time, you should not expect that visually the roof will look as attractive as possible.
Preparation of tools
Before you cover the roof with ondulin, you need to prepare a certain set of tools, among them the following: a hacksaw, a marker, a hammer, a safety belt and devices for lifting sheets. The hacksaw should have fine teeth that will do an excellent job of cutting ondulin. If the canvas is lubricated with oil, then the hacksaw will cut the material faster. You can use for cutting and manual circular saw. It is permissible to replace the marker with a soft pencil, it is best to take one that has a light shade. It will be needed for marking sheets. Some experts use wax crayon for this. To mark the cornice row, you will need a cord.
Nails should be hammered in with an ordinary hammer, but the sheets can be lifted up with the help of a special device. Ondulin is a lightweight material, so it will not be difficult to file it with your hands. But if the roof is quite high or there are other reasons that preclude manual lifting of the material, a convenient fixture should be built. The simplest will be a strong rope, on the edges of which there are hooks. They should be hooked on the extreme waves of the sheet and raised to the roof by the central part of the rope.
Roofing with ondulin must be carried out with personal protective equipment that the master will use. This should include a safety belt,sturdy boots, a hard hat, and a belt with pockets and overalls.
Need to use lining materials
If you decide to start laying ondulin, then you will probably face the question of whether there is a need to use vapor and waterproofing. The manufacturer claims that the properties of the described material make it possible to do without additional barriers, since the material copes with these functions. But if you want to insulate the attic or attic, it is best to additionally use waterproofing.
Laying sheets
Before starting roofing work, it is especially important to choose the right roof material. Ondulin will be the best solution for this, which will create a reliable and durable design. After completing all of the above work, you can start laying the sheets, this technology is similar to the installation of slate, but the technique in this case is simpler.
Installation is carried out in such a way that the vertical seams run apart. To do this, the first row should begin with a whole sheet, while the second - with half. By analogy with slate, the master will have to align the canvases relative to the cornice.
It is recommended to fasten sheets to the batten system with nails with plastic caps for hats. However, in some cases, self-tapping screws are used, as well as roofing nails. But in the latter case, the technology will be broken, so emergencies may occur that the manufacturer will not accept as claims.
The ondulin roof is mounted in such a way that about 20 nails should go on one sheet. The lower part of the canvas is fixed in each upper wave, on the following elements the fastening is carried out in a checkerboard pattern, fasteners will need to be installed in one wave. As practice shows, difficulties can arise at the moment of closing the caps on the nails, experts recommend closing them on the ground, hammering in the desired position.
Work methodology
In the installation instructions you can find information about the overlap parameters. In the case of adjacent sheets, it should be two waves, while the vertical overlap is equivalent to 30 centimeters, which is true for a slope of 10 degrees. With a slope of 15 degrees, the overlap should be 20 centimeters in the case of a vertical joint and one wave for a side overlap.
In order to maintain the same level of entry of one sheet onto another, you first need to apply a line on the surface of the sheets with a beating. If an ondulin roof is to be built on the surface of a metal frame, then the nails should be replaced with self-tapping screws. At the beginning of work, it is necessary to take into account the direction of the wind that prevails in a particular area.
The first sheets are fixed on the roof slope, which is located on the opposite side from the direction of the wind. The second row starts with half a sheet, in which case laying will be much more convenient, and material consumption can be reduced. This is due to the fact that the overlap of the side joint will be three sheets, and notfour.
The design of the ridge and valleys
If you decide to use ondulin for work, it is recommended that you first consider a photo of the roofs. Perhaps this will allow you to understand how best to carry out the work. As soon as you move on to fixing the roof ridge, you need to start fixing it using the same technology as the slate itself. It is mounted along the inner parts of the waves to the additional elements of the crate.
When designing valleys, elements made of ondulin should be used. For them, an additional crate is formed. The same technique should be applied when making a tong. But it can be mounted with a simple bend, as well as fixing a part of the ondulin sheet with nails. To do this, use a gable board. But this method can only be used when the air temperature is positive.
Features of material calculation
Calculation of ondulin on the roof can be done by you yourself. To do this, you need to know the basic geometric parameters. If you use a sheet that measures 0.95 x 2 meters, then its area will be 1.9 square meters.
It is important to take into account the roof area when calculating. If these works are carried out at the construction design stage, the area can be determined by projection. In this case, you should use the knowledge of geometry. Ondulin dimensions for the roof are indicated by the manufacturer as a useful and complete value.
Roof structure surface breaksinto individual geometric objects, such as triangles and trapezoids. Using mathematical formulas, you will be able to calculate the area of each element. Further, it should be noted that the roof has a certain slope. The angle of inclination of each geometric object must be determined relative to the ground.
All the indicators obtained during the above calculations should be summed up, which will allow you to get the roof area. If the projection of the structure is represented by a rectangle, and the angle of inclination is 30 degrees, then the area of the roof can be determined by multiplying the area of \u200b\u200bthe rectangle by the cosine of the angle of inclination. If you have an area value, you can calculate the number of sheets. To do this, the indicator of the roof area must be divided by the useful area of \u200b\u200bthe roofing sheet. The last value will depend on the slope of the slope and may be 1, 3; fifteen; 1.6 square meters.
Decoration of joints and arrangement of ventilation
In order to properly cover the roof with ondulin, you need to familiarize yourself more closely with all the rules that provide for compliance with the technology. For example, it is necessary to arrange the junction of a vertical wall and a roof by installing an ondulin apron. Among other things, waterproofing must be laid in the designated place by fixing the apron with nails. In order to provide ventilation, a roof fan should be used, which is attached to each wave that has an interface with the sheets.
Roof windows needed to provideattic space with sunlight, are fixed with nails, and the upper part is made out with euroslate, which is laid with an overlap to prevent flooding of rainwater. The roofs of the houses look very attractive after the completion of the work. Ondulin fastening may include the exclusion of gaps between the sheets and the ridge. For this, a special filler is used. You can improve the waterproofing of the eaves with the use of a special box. For the overhang of the sheet on the eaves, 70 millimeters will be enough. This setting is the maximum.
Ventilation ducts can be formed using ventilation pipes, which are manufactured by the company that produces the roofing material. They are fixed with nails on each wave of the base. The upper part is overlapped.
In order to prevent birds and insects from getting into the gap between the sheets, a ventilation comb should be installed in this place. It is mounted with nails on the eaves under the sheet. When arranging a metal crate and fastening sheets with self-tapping screws, excessive tightening of the fasteners should be avoided, otherwise the material may be damaged. For waterproofing joints and junctions of the structure with roof windows, you can use the protection of cornices using self-adhesive onduflash tape. She will make the valleys more complete. This tape is produced by the same companies that make ondulin. If you want to use a vapor barrier layer, then you can purchase lining material brand "Ondutis" R70.
Recommendations for the master
If you decide to purchase ondulin for roofing, it is recommended to consider a photo of the roofs even before visiting the store. Appropriate calculations are also made before the purchase. The surface area of the roof should be determined from the eaves, and the edge line of the structure should not be used.
Material dimensions
If the roof is covered with ondulin by the hands of an inexperienced craftsman, then before purchasing materials, it is important to familiarize yourself with its geometric parameters in more detail. In the manufacture, the manufacturer uses certain standards, which sometimes have small errors. For example, along the length of the sheet, the figure can be increased to ten millimeters or reduced to three. As for the width, the value can be increased or decreased up to 5 millimeters. If we consider the standard dimensions, then the length, width and thickness of the sheet will be 2000 x 950 x 3 millimeters. One sheet weighs 6 kilograms, and the wave height of the canvas is equivalent to 36 millimeters. The error may be 2 millimeters in both directions.
