How to put ondulin

Considering putting Ondulin roofing sheets in place? Whether you’re replacing an old roof or taking on a new one, Ondulin provides a strong and portable solution. Ondulin sheets are renowned for their ease of installation and resistance to weathering since they are composed of cellulose fibers, bitumen, and resin.

It is crucial to prepare the roof surface and assemble the necessary tools before starting. To achieve a watertight seal, overlapping sheets are usually used during ondulin installation. This do-it-yourself material is easily cuttable with a utility knife, so even beginners can use it.

In order to avoid wind uplift during installation, pay close attention to precisely aligning and firmly fastening each sheet. Over time, stability will be ensured by properly fastening with screws or nails at the right places. Because of its flexibility, Ondulin can fit into a variety of roof shapes, increasing its adaptability.

An Ondulin roof is relatively easy to maintain once installed. Its lifespan can be considerably increased with routine inspections and small repairs. Gaining knowledge about the installation procedure will enable you to decide on your roofing requirements with confidence.

Prepare the Roof Surface Clean and smooth the roof, removing any debris.
Measure and Cut Ondulin Sheets Measure accurately and cut Ondulin sheets to fit the roof dimensions.

We’ll take you step-by-step through the installation of Onduline roofing sheets, a long-lasting and reasonably priced roofing option, in this guide. Every important step, from prepping the roof surface to cutting and fastening the sheets, is described in straightforward terms so that both novice do-it-yourselfers and licensed roofers can understand them. You "will be equipped with the knowledge to successfully install Onduline roofing and ensure a long-lasting, weather-resistant roof for your home or project" if you adhere to these simple instructions.

Technical parameters of Ondulin and their impact on laying technology

Even though the material is relatively new to the construction market, it is composed of well-known and recognizable materials.

The Ondulin sheet’s composition

  1. Base. Ondulin is made from technical cellulose. It is obtained after processing the waste paper or use non -infected cellulose, unsuitable for the manufacture of quality paper. The base is a very cheap material, which has a positive effect on the formation of price.
  2. Hydraulic protection. Pressed cellulose is impregnated with modified bitumen. Thanks to modern innovative additives, bitumen retains plasticity at low temperatures, has increased protection against the negative effects of rigid ultraviolet rays. It must be understood that modified bitumen only exceeds natural in these parameters, but this does not mean that it is plastic at significant negative temperatures or is not completely afraid of UV rays.
  3. Dyes. Persistent chemical compositions are used to improve the appearance of the coating. But over time, like all mineral dyes, it fades in the sun, the roof slopes, depending on the location in relation to the cardinal points, acquire various shades.

Smart Ondulin. Features and arrangement

Ondulin’s low cost fully complies with contemporary operational characteristic standards. The manufacturer’s brochures about how long their products last should not be taken too seriously. At most, the roof beneath the ondulin completely deteriorates after 7-8 years and cannot be repaired. Either accept the changes that have occurred, or use new materials to block the roof.

General tips for laying Ondulin

Home rafter systems influence styling technology and have unique qualities of their own. However, there are general laying guidelines that should be considered in every situation. The technical specifications of ondulin support general recommendations, which are independent of roof type.

Attachment to the crates

The slopes’ angle of inclination

Although the technology for applying ondulin is fairly straightforward, experts have their own tricks that not only speed up the process but also improve the roof’s ability to seal.

Prices for various types of Ondulin


Step -by -step installation instructions

Take into consideration the scenario where a house with a four-sided roof is entirely made of its own material. Prior to beginning work, the necessary quantity of supplies and extra components should be determined. Tools and specialized equipment should also be ready. As long as one follows the guidelines, very little waste occurs.

Calculator of calculating ondulin sheets for the roof

Make sure to inquire about the weather for a few days in advance; roofing should only be done in dry, mildly warm weather.

Sensible guidance. Purchase the most expensive roof from reputable manufacturers. They employ subpar raw materials, flagrantly disregard production technology, and produce goods that not only fall short of specifications for mechanical strength and resistance to adverse weather conditions, but also significantly deviate from linearity and sheet geometry.

Step 1: Set up the area so that ondulin can be supplied to the roof. Common pallets can be folded into stacks of different heights and used as a stairway; alternatively, a device made of boards can be used for serving. Line the second high platform with sheets.

Take care when handling ondulin and consider the direction of the wind. Keep in mind that the material is easily bent by small forces, and that sharp excesses lead to cracking. There is nothing wrong with it if the crack is on the wave’s crest; the sheet can still be applied. In addition, if the issue arose in the hollow, it must be cut and used in pieces or disposed of.

The image displays how to present ondulin.

Step 2: Serve the ondulin to the second step. Its height should allow the material to be supplied to the rafter system’s crate. Raise roughly ten sheets at a time to the rafter system. Too high a pile will make roofing work on the rafter system more difficult and is no longer necessary.

Transfer of roof sheets

Step 3: Pull the ropes that hang over the cornice. Half the diameter of the drain system’s gutters is represented by the overhanging edges of the sheets. If a 125 mm gutter is used, the overhang will be between 50 and 60 mm. If this requirement isn’t met, water from the roof will leak past the gutters and onto the ground.

Vital. Make sure to verify the slope sizes. Every corner must be square, with opposing cornice overhangs that are exactly parallel. By measuring the diagonals of a rope, which ought to have the same values, it is better to believe it. If scattered, the crate must be cut in order to get rid of them.

Step 4: With the edges of the sheets aligned on the rope, begin laying from the bottom row.

The sheets’ edges line up with the rope.

Since the sheet’s edges are initially fixed, stretching is not allowed. The waves gradually level out and the sheet’s width grows if the nails are driven in one after the other. Taking into consideration the manufacturer’s recommendations, metizes can only be injected into other waves in a checkerboard pattern after Ondulin has been fixed into place.

The pattern of Metiza into Ondulin is checkerboard-like.

Similarly, cover the entire first roof slope with the roof.

The image displays an immobile leaf ondulin

Coating the second slope

The hardest parts of a four-scann (Valmova) roof are its four adjacent sections; leaks or other depressurries typically occur in these areas.

It is best to begin work from the corner. You must learn how to accurately remove the measurements in order to trim each adjustment sheet. There are two approaches to this.

Ondulin must be cut entirely on the diagonal.

  1. Put a whole sheet in your place, apply two points on the edges of the material from the back of the felt -tip pen. The first point indicates the minimum sheet length, the second maximum. Remove the sheet, lay on a flat surface, connect the points with a straight line and cut.
  2. Roll the size of all sides of the free area, which is planned to cover. Transfer dimensions to the sheet, draw a line between the marks and cut off along it.

Whichever approach is employed, there are no essential differences. Avoid aiming for extreme precision and avoid wasting time in vain. Factory special elements are used to seal the slopes. The element’s sides are at least 10 cm wide on each side. This is sufficient to remove mistakes that were made when cutting or removing sizes, all of the cracks are tightly sealed, and the roof’s tightness is maintained.

Coating of the roof’s second slope

Vital. The second nail needs to be scored into the second wave from the edge when leveling position. The first will cross over onto the following Ondulin sheet.

The next sheet is placed after the second one. At least twenty nails are used per sheet. There’s no need to try to increase the metizes step in order to save time. Because ondulin is a very soft material, it retains its original form better during operation the more nails it has. Even with incorrect fixation, the sheets are spreading because the strength is so low. Every wave should be secured near overhangs, along the line of overlap, and around the perimeter of the pipe bypass; the remaining spots should be connected in a checkerboard pattern.

Ondulin mounting method utilizing nails

Make sure you follow the guidelines to avoid clogged nails.

  1. The body of the metiz should be at right angles to the plane of ondulin. Inexperienced builders have cases when the wrong distance was chosen and the nail did not fall into the crate. Praise it, ate the board nearby, then you can tilt the nail and score an at a slight angle. There will be no leaks under the hat – the probability is very insignificant that the slanting drop of rain will fall into this small gap. And if it gets, then such a small amount of moisture will dry quickly, there will be no harm to the rafter system.
  2. The hat should only slightly touch the surface of the wave. Do not allow strong pressing, do not destroy the integrity of the material, exclude gaps. The sheet should be fixed motionless.

Sensible guidance. It is advised to make tags on the sheets’ surface so that all of the nails fall into the crate’s rails. Once it’s in position, draw lines on the Ondulin waves using a long, flat rail.

The hacksaw’s teeth become clogged with material when cutting ondulin; therefore, you’ll need to clean them on a regular basis with an old knife or wooden stick.

The material has clogged the hacksaw’s teeth.

It is advised to use silicone lubricant straight from the spray can to lubricate the cutting portion in order to minimize sticking. The cutting time before cleaning the tool increases by nearly double when spraying because the lubricant covers all working areas.

Ondulin leaves can be severed at the intersection of slopes and following fixation. After drawing a cutting line on the rail, trim off any excess. There is one small detail, though: the hacksaw’s canvas needs to be angled to avoid damaging the coating that has already been applied. Cutting with the fixed sheet is more convenient because it doesn’t need to be held. Regarding the precision and uniformity of the cut, we have previously stated that these are not issues because the premature components at the slope joints are fixed, leaving nothing to be concerned about.

It is more convenient to cut the fixed sheet.

Practical advice

  1. It is better to work with a material at a temperature of at least 0 ° C and not higher than +15 ° C. With such parameters, Ondulin has sufficient rigidity, which simplifies the laying process.

What air temperature is suitable for mounting ondulin

Is Ondulin suitable for walking on?

Ondulin service life: actual owner testimonials

An area of 200–220 m^2 on a four-sloping roof can be covered in roughly six days if all the work is done correctly.

Installing durable roofing is a doable do-it-yourself project that can greatly increase the longevity and appeal of your house. Make sure you have the required equipment and supplies before starting, such as onduline sheets, nails, a saw, and safety gear. To begin, precisely measure and cut the sheets to fit the dimensions of your roof.

To guarantee adequate water drainage, start laying the sheets from the bottom edge of the roof and overlap them one another. Nails are used to fasten each sheet, making sure they are positioned along the upper edge to stop water seeping underneath. Don’t forget to leave some space between the sheets so that they can expand and contract with different temperatures.

Continue overlapping the onduline sheets in each subsequent row as you climb the roof. When cutting sheets to fit around vents, chimneys, or other roof protrusions, use a saw. Before going on to the next row, make sure the sheets are straight and firmly fastened by checking each one twice.

Check the entire roof after all the sheets have been installed to make sure all the seams are sealed and there are no exposed nails. For extra defense against leaks, think about sealing overlaps and edges with a weatherproof sealant. To increase the lifespan of your onduline roof, regularly maintain it by removing debris and looking for any damage.

What do you think, which element is the most important for a reliable and durable roof?
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Gleb Zuev

Exterior designer, author of books about roofing materials. I will help you make your roof not only reliable, but also beautiful.

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