One of the ways to arrange the roof of a private house is to lay ondulin: a video on the Internet describes in great detail all the stages of installing this roofing material, so it will not be difficult to master the installation technology. But still, so that the key points of the video instructions for installing the onduline roof do not pass your attention, we will describe the algorithm for creating a roof from this really wonderful material.
And in order to work with ondulin you could consciously, we will begin with a detailed examination of the material itself.
What is ondulin?
In fact, only Onduline SA products, the company that actually developed this type of roofing, can rightly be called ondulin.
However, today a large group is called ondulin. roofing materials, the basis of which are bitumen-cellulose sheets.
However, sometimes ondulin (although this is not at all) is called almost any flexible roofing material - and you can hear someone mention, for example, transparent ondulin.
This ondulin is made from the following components:
- Bitumen
- Cellulose base
- mineral filler
- resin hardener
- Dye (mineral pigment)
In the production of ondulin, a cellulose base is impregnated with bitumen at high temperature and under pressure.
At the same time, after the addition of a plasticizer and fillers, an absolutely waterproof ondulin is obtained - the texture of this material, due to the location of cellulose fibers, also affects the waterproofing characteristics.
The cellulose base impregnated in this way is fed into the molding machine, where the ondulin is shaped. Today on the market you can find both flat ondulin and ondulin with different profiles.
What is good ondulin?
Ondulin is very popular today as a roofing material for private construction. And yet, before choosing ondulin as a material for your roof, you need to carefully read its advantages - and disadvantages.
The key advantages of ondulin are due, first of all, to its technical characteristics:
- Ondulin is an excellent waterproofing agent.Roofing from ondulin does not let water through even in the heaviest downpour, since cellulose impregnated with bitumen does not swell even if it is in contact with water for a long time. Low hygroscopicity makes ondulin an ideal roofing option for regions with high rainfall.
- Ondulin roofing resistant to both extreme temperatures (it tolerates both heat and frost) and temperature extremes. At the same time, ondulin completely retains its operational qualities and is not deformed.
- Another advantage of ondulin is biological and chemical inertness. Ondulin roofing is not affected by bacteria and fungi, and putrefactive processes do not develop in it. In addition, ondulin is not damaged when exposed to oils, diesel fuel, acids and alkalis.
- Well, speaking about the benefits of ondulin, one cannot fail to mention that ondulin is quite light. At the same time, its installation is greatly facilitated - ondulin still requires a much less massive roof frame than the same slate and metal tiles.
Disadvantages of ondulin
There are no ideal, flawless roofing materials, and ondulin - whether flat or wavy - is no exception. The disadvantages of ondulin include:
Fading of some varieties of ondulin in the sun. Despite all the assurances of Onduline SA over time, the onduline roof still becomes somewhat paler, so if the color scheme of the building is critical for you, keep this in mind.
To some extent, painting can save the situation, but not every paint is suitable for ondulin.VD-AK-101 or VAKSA, specially designed for painting bitumen-based roofing materials, have proven themselves well.
Mechanical strength at extreme temperatures. Despite the fact that the ondulin laid on the crate feels quite comfortable both in the heat and in the cold, walking on the roof of ondulin is possible only at moderate temperatures. Otherwise, the ondulin will either crack or bend.
And yet, these shortcomings cannot be called critical in any way, so ondulin has been and remains one of the most popular roofing materials.
We equip the roof from ondulin: advice from the masters
If you chose ondulin as a roofing material, do-it-yourself installation requires some preparation. And although the installation technology of an onduline roof is not complicated, some features should still be taken into account:
- If you use ondulin - laying should be carried out only in a certain temperature range. Do not mount ondulin at temperatures above +30 and below 0 degrees Celsius. In the first case, the softened bitumen in the composition of ondulin can cause deformation of the roofing sheets, and in the second case, ondulin, which is fragile in the cold, can crack under your weight or when it is pierced by a roofing nail. Installation at a temperature of about -5 degrees is allowed by the manufacturer, but it is better not to do this.
- In warm weather, you also need to ensure that the heated ondulin is not laid in a somewhat stretched state. This can lead to deformation of the roof at low temperatures, and sometimes to the formation of cracks in the attachment points.
- When laying ondulin roofing on a roof of complex configuration, it may be necessary to cut the ondulin to fit exactly to size.If you have doubts about how to cut ondulin, then it is better to use an oiled saw-hacksaw. It is also possible to cut with a circular saw, but some care must be taken when doing so.
- Ondulin is fastened to the crate only with special nails (you can buy them in the same place as the roofing material itself). The consumption rate of fasteners is (for a whole sheet) 20 pieces: ten in the lower part and 5 each in the middle and upper parts.
- roof lathing depends on which slope the ondulin will be laid on. For slopes up to 10 degrees - a solid crate made of plywood or grooved boards, for slopes up to 15 degrees - a thinned crate in increments of 45 cm. The maximum crate pitch - 60 cm - is used on slopes of 15 degrees or more.
Note! Regardless of what type of lathing is used on slopes, valleys, ridges and roof ribs require a continuous lathing, because. are quite problematic areas in terms of waterproofing.
Fixing ondulin
We lay ondulin on the prepared crate and fix it with special fasteners. Before nailing ondulin, sheets of material must be aligned horizontally and vertically.
Installation is carried out according to the following algorithm:
- Ondulin must be laid apart, so that the joints of the sheets do not coincide. Ondulin sheets are laid from the edge opposite to the direction of the wind predominantly blowing in the area. Such laying will protect the ondulin roof from wind loads, since fairly light ondulin sheets, especially those that are incorrectly laid and fixed, are often torn off by the wind.
- The amount of overlap of sheets on each other depends on the angle of the slope, while the smaller the slope, the greater the overlap. The maximum overlap (2 waves wide and about 30 cm vertically) is done when laying ondulin on a practically flat roof with a slope of up to 10 degrees. But for a roof with a slope of more than 15 degrees, an overlap in one wave and 15-17 cm, respectively, is enough.
- For fastening, as we noted above, we use only special nails. At the same time, we drive the lower row of nails into each wave, and drive the upper and middle rows through the wave in a zigzag. To ensure that all nails are fixed strictly in one line, we use a stretched cord or thick nylon fishing line.
- We attach the gutters of the drainage system to the cornice board. The ondulin sheet must protrude beyond the cornice board, however, the maximum allowable protrusion of the ondulin sheet is no more than 70 mm.
Note! Under the cornice you need to install a special cornice grate. It does not interfere with the installation of ondulin, however, it protects the under-roof space from the penetration of birds and insects. For non-ventilated cornices, a special sealant is used.
- We fasten the ridge element into each wave directly into the crate. When building up the ridge elements, we lay them with an overlap of at least 120 mm.
- To protect the onduline roof from the wind, we use special wind strips. We fill the wind strips on the gable parts of the roof in such a way that they completely overlap the adjoining of the ondulin to the edge of the roof.
If you carefully understand, this technology should not cause you questions or difficulties.And yet, in order to finally figure it out, we recommend that you watch the video attached to the article - laying ondulin still does not tolerate negligence, and it must be done as carefully as possible.
But if you master the technology to perfection, then the resulting roof will delight you for more than one year!
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