Construction of a roof from ondulin on an old coating- Review + Video

Construction of a roof from ondulin on an old coating- Review + Video DIY ondulin roof over the old roof. Ondulina is the best cheap and piecemeal roofing material, which is often used for the construction or renovation of buildings in the form of a backyard extension or a budget building. In all parameters of the operational type, it is inferior to other types of roofing materials, but still there are two distinctive advantages - the low cost of the material and the laying technology that is available to all beginners. In the production of work, you will not need to buy very expensive tools and devices, since with a great desire and some skills in performing construction work, you can make a roof from ondulin with your own hands, without involving assistants.

General information

Technical characteristics of ondulin and their effect on laying according to the technology

Despite the fact that this material got the construction market is relatively new, it is made from well-known and familiar materials.

The composition is as follows:

  1. Base. Ondulin is made from technical cellulose. It is obtained after recycling waste paper or using cellulose, which is substandard, that is, unsuitable for making high-quality paper. The base is extremely cheap, which gives additional positive aspects for price formation.
  2. Water protection.

    Cellulose, which is compressed, is impregnated with modified bitumen. Due to innovative modern additives, bitumen is able to maintain plasticity at low temperatures, and also has an increased level of protection against the negative effects of ultraviolet hard rays. It should be understood that modified bitumen only surpasses natural material in parameters, but this does not mean that it can be plastic at high negative temperatures or is not completely afraid of ultraviolet rays.

  3. Dyes. They are used to improve the appearance of the coating, and only very stable chemicals are used.

    But after some time, as well as mineral dyes, it fade in the sun, especially the slope of the roof - it all depends on the location in relation to the cardinal points, and different shades are obtained among themselves.

The low cost of ondulin will fully meet the same low performance characteristics by modern standards. You should not strongly trust brochures in advertisements from manufacturers that the material has a long service life, at best such a roof will last for 9 years, and after that the roof completely loses its original appearance and cannot be restored. You should either put up with the changes received, or close the roof with new materials.

General recommendations for laying ondulin

The rafter system of each house has some of its own characteristics of the individual type, and they will affect the laying technology.

But for all cases, there is a general set of installation recommendations, and they should be taken into account in each case. Such general advice is based on the technical parameters of the roofing material, and will in no way depend on the type of roof.

Despite the fact that the laying technology is quite simple, professionals have their own secrets that allow not only speeding up the process, but also increasing the level of reliability of roof sealing. Despite the fact that laying ondulin is quite simple, professionals have certain secrets and tricks that make it possible not only to speed up the process, but also to increase the reliability of roof sealing.

Step-by-step installation instructions

Let's consider the option when the roof is made independently and completely, and the house has a hipped roof.

Before starting work on the restoration of the roof with the old ondulin, you should calculate how much materials and special devices you need. If you follow the recommended rules, you get a minimum amount of waste.

Please note that you should ask in advance what the weather forecast will be for the next few days, since roofing work is allowed only in moderately warm and dry weather.

Helpful advice: you shouldn't buy cheap roofing from an unknown manufacturer. The fact is that those who are engaged in "clandestine" production use low-quality raw materials, and there are also many gross violations of production technology, and the products not only do not meet the requirements for mechanical strength and resistance to negative climate impacts, but also have serious deviations by linearity and geometry of sheets.

Construction of a roof from ondulin on an old coating- Review + Video Step # 1. First, you need to prepare a platform in order to serve ondulin directly on the roof. To do this, you can stack ordinary pallets in piles at different heights and use them like a regular ladder, and there are also other options - feeding with devices made of boards. The sheets should be placed on the second highest area. Ondulin should be carried very carefully, and also be sure to take into account the direction of the wind.

Remember that the material can bend easily even with minor forces, and sharp bends can be a real cause of cracking. If the crack is on the crest of the wave, then there is nothing to worry about, you can change such a sheet. And if the problem appears where the depression is, then the sheet should be cut along the crack line and used in parts or discarded altogether.

Step # 2. Submit ondulin to the second step, which should be of that height so that the material from it can be fed to the crate with a rafter system.

In one step, about 10 sheets should be lifted on the rafter system, and more is not required, since if the stack is too high, it will complicate the roofing work on the rafter system.

Construction of a roof from ondulin on an old coating- Review + Video Step # 3. Stretch the ropes over the eaves. Please note that the overhang of the edges will be equal to half the diameter of the drainage gutters. If you plan to use gutters with a diameter of 12.

5 cm, then the light should be within 6 cm. This condition must be met, because if this is not done, water from the roof will spill onto the ground without falling into the gutters.

Please note that all skate sizes should be checked beforehand. All corners must be straight, and the eaves, which are opposite, must be parallel. It is better to check it with a rope by measuring the diagonals, they should have the same value.

If there are any discrepancies, then it is better to eliminate them by sawing the crate.

Step # 4. It is better to start laying from the bottom row, and align the edges of the sheets along the ropes. First, fix the edges of the sheet, and thanks to this, it will be excluded from stretching. If the nails are driven in sequentially, then the waves will even out after a while and the width of the sheet will become larger.

Only after fixing the position of the roofing material can the hardware be driven into the rest of the waves, adhering to a checkerboard pattern and taking into account the recommendations of the manufacturers.

In a similar way, the roof should be laid over the entire area of ​​the first roof slope.

Covering the second slope

The difficulty in arranging a hip (four-slope) roof is that it has four junctions, and such sections are the most difficult, since in depressurization or leaks most often appear. Work should start from the corner. Each junction sheet should be cut, and in order to do this, you will first need to correctly take measurements.

You can do this in two ways, so that in the future you get a do-it-yourself ondulin roof.

  • Place the whole sheet in its place, and on the back with a felt-tip pen, draw a couple of dots around the edges. The first point will indicate what is the minimum sheet length, and the second point will indicate what is the maximum. Next, remove the sheet, lay it on a flat surface, connect the points in the form of a straight line and cut along it.
  • Use a construction tape measure to measure both sides of the free area to be covered.

    Transfer the dimensions to the sheet, draw a line between the marks and you can already cut along it.

In general, there is no fundamental difference in which method to use. Don't try to get perfect accuracy, and don't waste your time. Use special factory-type elements to close the slopes. The width of each side of the element must be at least 0.

1 meter. This will be quite enough to eliminate mistakes made when measuring or cutting, all the slots will be reliably closed, and the tightness of the roof will not be broken.

Please note that when aligning the position, the second nail should be driven into the second wave from the edge. The first one will be covered by the next sheet of ondulin.

After placing the second sheet in place, fix the next one.

The number of nails on each sheet should be at least 20 pieces. Try not to save execution time, and increase the step of the hardware. The fact is that since ondulin is a soft material, the more nails, the better it will retain its original shape during operation. The strength is so low that the sheets can start to creep even due to improper fixation. Near the overhang, along the overlap line and along the perimeter of the pipe bypasses, each must be fixed.

Wave, and fix the rest of the places through one in a checkerboard pattern.

Be sure to use the rules for driving nails

  1. The body of the hardware must be at right angles to the ondulin plane. Some builders with little experience had cases when they chose the wrong distance and the nail simply did not fall into the crate. It should be shaken a little, and if the board is not far away, then the nail can be tilted and hammered at a slight angle. There will be no leakage under the cap, since there is a minimal likelihood that oblique raindrops will fall into just such a microscopic gap.

    Even if it does, such a small amount of moisture will quickly dry out, and there will be no harm to the rafter system.

  2. The hat must only slightly touch the surface of the wave. Do not allow for strong indentation, and also that the integrity of the material is not destroyed and eliminate gaps. The sheet should be fixed so that it is stationary.

Good advice! In order for each nail to hit the batten rail, we recommend placing marks on the surface of the sheets.

After it is laid in place, lines should be drawn with the help of an even long rail on the waves of ondulin.

When cutting the ondulin, the teeth of the hacksaw should be regularly cleaned with an old knife or wooden stick, as the teeth will clog. To reduce the level of adhesion, it is recommended to lubricate the cutting end with a can of silicone grease.

You can cut off the sheet on the roof from ondulin after you fix it. To do this, take a rail, draw a cutting line, and then you can start cutting off the excess.

But in this case, there is a certain nuance - the hacksaw blade should be tilted so that it does not touch the installed coating. A sheet that is fixed is much more convenient to cut, and you do not need to hold it. As for the accuracy and evenness of the cut, as we said, this is also not a problem, everything can be corrected by fixing the additional elements at the junction of the slopes.

Practical Tips

Let's look at the best tips:

  1. It is better to work with the material when the temperature will not be lower than 0 degrees and not higher than +15 degrees. In such temperature conditions, ondulina is quite tough, and this simplifies the laying process.

  2. Walking is only allowed on the ridges and only soft shoes are allowed to work. It is advisable that you step on those places where there are nails, as they will be able to hold most of the weight, and the load on the sheets themselves will be minimized.
  3. Remember that ondulin is the cheapest and lowest quality material of all existing types of roofing materials. Don't expect it to last very long.

If all the work is done correctly, then a hipped roof with an area of ​​about 200 m 2 can be covered in 6-7 days by yourself, without outside help.

Technology of laying ondulin on top of the old coating

Most often, ondulin is used for roofing only in European countries. Small old buildings that are far from the residential area and are used as a hunter's house were previously covered with asbestos-cement slate. Its service life is about 35 years, and wooden houses without major repairs can be used for at least 50 years. Since it is impractical to repair the roof with expensive materials, it is better to use ondulin, which quickly, with minimal waste, and at the same time the quality of the new coating is satisfactory, makes it possible to use the house until it wears out. The example was developed for a forest house where people live only in summer and its area is 50 m 2 .

  1. Construction of a roof from ondulin on an old coating- Review + Video Prepare materials and tools. For work, you will need 300 bars with a cross section of 5 * 5 cm, 37 sheets of standard size ondulin. The total mass of the material will be 200 kg, and this makes it possible to transport everything in a passenger car. From the tools you will need a tape measure, a hammer, an assembly knife, a rope, a square, a hacksaw for wood, a chisel, a screwdriver, a felt-tip pen or a pencil. Each sheet will require at least 20 pieces of special nails.

  2. Check the condition of the old roof. Check the plane of the slopes, make sure that the lathing and rafter system are not too damaged, there is no rotting process due to slate leakage. The moment is extremely important, since the new roof covering can only be installed on a serviceable roof.
  3. Make a ladder to move safely on the roof, clean the surface of the slopes from falling leaves. It is advisable to remove moss if it appears on the surface.

  4. Measure the dimensions of the roof, decide on the type of overhang. It will depend on the parameters of the water drain system. The edges of the material should be in the middle of the chute.
  5. Prepare all lumber. You will need longitudinal bars; in the future, a horizontal crate will be attached to them.

    Attach the longitudinal parts to the old roof using self-tapping screws with a length of 8 cm.They must definitely fall into the old crate. To do this, screw in the screws near the slate nails.

  6. Also, the lower edge of the ondulin sheet should be nailed into each of the waves, because otherwise it will be blown up by the wind or deformed. In order to get a reliable fixation, install the bars along the entire length of the roof.

    The distance between the vertical bars should be about 0.6 meters, calculate how many waves you need to fix them and keep all the parameters.

  7. Nail or screw the horizontal type crate with self-tapping screws, the joints should be located as much as possible in the center of the vertical beams. The step of the lathing will depend on the angle of inclination, but most often it is 0. 61 meters.

Important! In places where there will be an overlap of several sheets of slate, a horizontal bar should be cut down. The depth of the cut will be equal to the increase in the height of the roof in that place.

To speed up and facilitate the work, use a template that will help you control the step of work. The length of the template should be equal to the step from which the width of the bar was subtracted. On the ends, nail the bars along the entire length of the slopes, and then wind boards should be attached to them.

Saw off the excess parts of the cross bars and you can work with an electric or hand saw.

Next, you can start fixing the roofing sheets on the roof, and you should constantly monitor their position, and also follow the installation and safety rules. First, nail in the extreme waves, and then the sheet will be fixed in the required position, which will exclude changes in linear dimensions due to a slight alignment of the waves. Further, in a checkerboard pattern, all other nails should be hammered.

To avoid unpleasant situations when fixing the sheets, make marks on the surface of the battens of the crate, which are located on top.

It will not take much time, but it will significantly simplify the process of roofing. The extreme wave should be fixed only after laying the next sheet, and one fastener will hold both elements. The overlap of the sheets should be at least 14 cm. To improve the appearance, the wind board can be covered with metal decorative strips, which are commercially available together with the elements of the roof.