How to fasten ondulin

A strong and secure roof for your house or building is ensured by securely fastening Ondulin roofing sheets. Bitumen-soaked fibers are used to create the lightweight, durable material known as ondulin, which has exceptional durability and resistance to weather. Not only does proper installation improve these sheets’ functionality, but it also adds to the overall stability of your roof.

Starting with a solid base is crucial when attaching Ondulin sheets. Verify that the roof structure—whether it is made of metal or wood beams—is sturdy enough to hold the weight of the sheets. Any subfloor components, like plywood or insulation, need to be securely fastened and clear of any debris.

Choosing the right fasteners is essential to your Ondulin roof’s lifespan. It is advised to use screws made of stainless steel or galvanized steel because they are resistant to corrosion and hold tightly over time. The length of these screws should allow them to pass through the sheet and into the underlying structure without sticking out too much, which could jeopardize the roof’s waterproofing.

It is crucial to evenly space the fasteners across every Ondulin sheet to ensure consistent support and to avoid any possible lifting or warping during strong winds. Generally, screws should be positioned according to the manufacturer’s recommended spacing guidelines, at regular intervals along the edges and at key locations in the center of each sheet.

Finally, make sure that every fastener is firmly tightened without going overboard, as this could harm the underlying structure or the Ondulin sheets. To keep the sheets in place and permit natural expansion and contraction due to temperature variations, a snug fit will do.

Technical characteristics of Ondulin

It is impossible to list every scenario that could arise during roof installation. There is only one solution: thoroughly examine Ondulin’s operational and technical features and, using this information, independently decide during roofing work.

Ondulin parameter Meaning and brief description
Density The material is made from paper production or secondary raw materials. Cellulose is pressed, due to which the density of 0.9–1.2 g/cm3 is achieved, the parameters meet the provisions of the current GOST 8747. These are the lowest values ​​among all the materials for the roofs. The low density indicates low indicators of bending resistance, which negatively affects the time of operation. At the same time, a slight density reduces the weight of the roof, the rafter system can be made of cheap lumber, this is a positive difference.
Temperature stability The main astringent of Ondulin is ordinary or modified bitumen, and this material reacts very negatively to changes in temperature. With its increase above the limit values ​​of bitumen, it becomes critically soft, the roof almost loses resistance to mechanical loads. At minus temperatures, bitumen becomes fragile and with minor efforts cracks. Ondulin laying is prohibited when exceeding values ​​+30 ° C and -10 ° C. But in the zone of permissible temperature the installation of the roof must be done extremely carefully.
Frost resistance A very important parameter for the northern regions of our country. It is characterized by the number of freezing/measurement cycles without deterioration of the initial indicators of the material. For Ondulin, frost resistance only 25 cycles. But this does not mean that it can be operated for 25 years and calmly withstands 25 winters. The night temperature drops to minus values ​​in spring and autumn, the roof can freeze for a month several times. Such phenomena significantly reduce the warranty life, on average for various types of ondulin, it is 15 years. Frost resistance depends on water absorption, in Ondulin it is the highest and is 1.5%. The more moisture – the more ice, respectively, the more significant the damage to the material during its formation.

Technical specifications Smart Ondulin

Ondulin is regarded as a low-cost alternative to roofs with equivalent quality. Prestigious buildings are not covered by it; instead, it is frequently used as a temporary roof.

Ondulin’s roof

Owing to ondulin’s poor strength, the geometry of sheets can be violated during long-term storage or transportation, greatly complicating the installation process. For example, it can be challenging to align the sheets, the waves can vary, the combs can get mixed up, etc. D.

Sheet geometry is not infallible.

The most conscientious manufacturers have recently released new DIY and Smart models with smart locks that tighten coatings.

There is a factory marking to help with choosing fixation points on the surface and to continuously check the position of the sheets. The two convex stripes that make up a castle are roughly 15 mm wide. This allows for precise sheet combining, precise control over their positioning, and total prevention of water or snow intrusion in certain areas. Every sheet is precisely parallel to the slopes and has an even cornice overhang. An additional benefit of plus grooves is that the suggested overlap size reduces, increasing the sheets’ usable area.

Smart Castle has nail tags and less overlap in Ondulin.

Prices for various types of Ondulin


"In our tutorial on securing Onduline roofing sheets, we go over useful methods and advice to guarantee a sturdy installation. This post attempts to make the process easier for both professionals and do-it-yourselfers by explaining everything from selecting the proper tools and nails to picking the right placement and spacing. You can have a long-lasting, weather-resistant roof that endures by following these simple instructions."

Practical tips for laying Ondulin

The styling technology isn’t all that complicated; the material is simple to cut and nail, and because of certain unique components, the sheets line up perfectly throughout the slope. However, skilled installers know a few tricks up their sleeves.

What information is necessary before beginning to lay?

It is required to carefully follow all manufacturer recommendations and demand laying instructions during the Ondulin acquisition process. Recall that this instruction serves as a coupon for the warranty at the same time. It’s true that there aren’t many real-world examples of consumer complaints regarding improper roof quality being resolved in a positive way. Definitions of all premature elements are included in the document, along with advice on how to properly bypass chimneys, seal yends, install sheets in place of cornices, and lateral adjoin.

Directions and a warranty coupon

Only after the devices are ready, the materials and extra components have been acquired, the tools are available, and the drainage system’s location has been determined can you begin work. It is imperative that you cover the roof as soon as possible because any technological pauses raise the possibility of the weather getting worse. And there are always dire repercussions from this.

Accessories required for Ondulin installation

Examine the weather forecast for the day of roofing as another crucial point. However, remember that Ondulin faces issues with other types of roofing in addition to rain. It is not permitted to work with it when the air temperature is higher than +30 °C. Don’t let the sheets get too hot in the sun for too long. Ondulin is typically dark in color. When the sun heats the surface quickly, it loses physical strength and undergoes changes in its geometric shape and linear dimensions. Ondulin cannot be laid at a temperature lower than -5 °C.

Ondulin is laid when the weather is warm and dry.

Use a colored pencil or marker for marking, and cut a piece of the sheet with a single flat factory edge in place of the typical flat ruler. Using it, you can continuously draw a line on the ondulin waves and check the cutting quality. However, you shouldn’t take too long to follow this advice because mistakes made when marking or cutting within 1-2 cm are not taken seriously. The truth is that installation technology always pours additional elements over the cut edges, whose dimensions smooth out any bumps.

An illustration of marking

It is advised to use a regular hacksaw to cut ondulin on wood with small teeth. Water must be applied to the canvas on a regular basis to improve gliding. Experience has shown that using different electrical tools is not beneficial. During operation, the cutting speed and accuracy are the same as with a hand saw, but new issues arise. Extension cords are necessary, and you should keep an eye on the location of electrical cables and t. D., but doing so from the roof is challenging. A basic construction knife cuts the material perfectly along the waves.

How to trim ondulin

At least twenty nails should be beaten into each sheet. You should abide by this rule at all times. Inadequate fixation points lead to deformation, linear disorders, and edge bending in ondulin, a soft material. Another issue is that there is a growing chance that strong wind gusts will erode the coating. Most businesses follow the advice of the manufacturers and mark fixation points on the front surface.

More than twenty nails are used to secure each leaf ondulin.

The extreme nails are first nailed, due to this, the drawing of the soft sheet is prevented. Then, in a checkerboard pattern, everyone else is recorded. You need to score carefully, the hats should not push the sheets. But you can’t leave the gaps, the ondulin will move a little and increase the diameter of the input holes, leaks may appear in these places. The nail enters the crate at right angles. If the tip did not fall into the tree, then it is allowed to tilt the body of the metiz, do not worry that water will fall through a small gap. Firstly, the likelihood of an accurate hit of a drop in this gap is small. Secondly, on the crest the waves never there are significant flows of water. Thirdly, if a few drops fall under the roof, then they will quickly dry out and do not harm the rafter system of the house.

The arrangement of clogged nails

How to accurately score nails

Because of this technology, sheets on slopes must be laid with rows spaced apart; four corners are not concentrated in one area.

Ondulin’s installation is currently underway.

A lot of corners elevate the overflow area, the roof becomes uneven, and there’s a greater chance of falling into the snow or water-filled slots. Every even row for displacement needs to be laid from half a sheet. First to be installed are the lower rows. Should you need to move along the sheets that have been laid, proceed with extreme caution. A few rowers should be working at once, and it’s advised to use special equipment if Ondulin is extremely hot. We will explain how they are made below.

The following guidelines are general in nature and must be followed when covering both simple and complex roofs.

Calculator of calculating ondulin sheets for the roof

It’s simple to secure Onduline roofing sheets, but it does need careful attention to detail and the appropriate equipment. Make sure the roof surface is clean, dry, and clear of debris before beginning any preparations. This lays a strong basis for the installation.

The locations where the sheets will be attached should then be measured and marked. Make use of the proper fasteners, such as screws or nails made specifically for Onduline. To firmly anchor the sheets in place, these should pierce both the substrate and the roofing material.

To ensure proper water shedding and durability, overlap the edges of each sheet in accordance with manufacturer guidelines when attaching them to the roof, starting at one edge and working systematically across and down.

Examine the installation to make sure everything is tight and aligned once all of the sheets have been firmly secured. Look again for any areas that might require reinforcement or loose fasteners. In addition to improving the appearance of your home, properly installed Onduline roofing offers dependable weather protection for many years to come.

Video on the topic

Installation of ondulin on screws

Installation of the Ondulin forceps

How to score the nails ondulin correctly

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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