Ondulin roof and installation instructions

For homeowners searching for a reasonably priced, long-lasting, and lightweight roofing option, ondulin roofing is a popular option. Ondulin sheets, which are made of organic fibers that have been saturated with bitumen, are renowned for being weather resistant and simple to install. To ensure a sturdy and secure roof, it is essential to comprehend the installation process, whether you are building a new roof or replacing an old one.

Ondulin roofing installation is a series of simple steps that both professional roofers and do-it-yourselfers can complete. Every stage of the process, from leveling the roof to fastening the sheets and adding finishing touches, is essential to the roof’s long-term functionality and resilience. In addition to improving your home’s visual appeal, proper installation shields it from the elements all year long.

We’ll walk you through each step of installing Ondulin roofing in this article. You’ll discover the equipment and supplies needed, as well as useful advice on how to speed up installation. This guide intends to provide you with the information you need to make well-informed decisions regarding your roofing project, whether your interest is in the advantages of Ondulin roofing or the detailed installation instructions.

This introduction sets the stage by outlining the importance of understanding Ondulin roofing and its installation process, preparing readers for the detailed guidance to follow.

Ondulin coating

Asbestos is not present in ondulin, a fibrous roofing material composed of natural organic materials that is reasonably durable. An ondulin roof is sometimes referred to as Euroslate because it resembles cement slate. Ondulin, like any substance, has benefits and drawbacks.

Advantages

• water resistance. During manufacturing, the material is impregnated with a special water-repellent solution, which prevents water drops from penetrating into the structure of the material;
• resistance to acids and alkalis;
• frost resistance;
• hygiene and environmental Safety material;
• ease. Asbestos-cement slate sheets of the same size have a weight four times higher than similar euro-slate sheets;
• ease of installation: easy to cover curved roofs, sheets are easy to cut and lay out;
• good sound insulation;
• durability. Despite the service life of ondulin declared by the manufacturer to be up to 15 years, the coating can last three times longer;
• acceptable price.

Flaws

• pretty fast loses color saturation;
• fire resistance. Considering that the material is made from organic substances, it fire resistance is very weak;
• strength. The strength of the material can also be attributed to the disadvantages. The strength of Euro slate directly depends on the correctness of its installation (laying angle, slope, lathing pitch). If the installation is damaged, the strength indicator suffers first of all;
• low resistance to biological phenomena. It has been noticed that mosses and fungi often settle in poorly lit areas of the roof.

Ondulin roofing is still very popular despite its drawbacks, especially since its benefits can guarantee the coating’s quality.

How to make a sheathing

The sheathing is the foundation of the roof, the frame, and its installation necessitates adherence to specific regulations. The beams (or boards) used to make the lathing for fiber ondulin range in cross section size from 40 mm to 60 mm. Coniferous trees are typically used to make wood beams.

Make sure the sheathing material is soaked in antiseptic before installing it.

There are multiple stages involved in implementing sheathing under euro slate:

1. attaching waterproofing material to rafters. It is mounted at overlapping joints and secured with a stapler;
2. beams are attached to the overhang of the roof edge and along the end holes, forming a cornice. In this case, the board from the base of the canopy should be of a large cross-section, and the step between the beams should be smaller. The protrusion of the first board should exceed the width of the cornice;
3. install the remaining sheathing boards parallel to the cornice. To accurately observe the parallelism and pitch of the sheathing, you can build a wooden template;
4. securing the gutter holders using self-tapping screws;
5. a wind board is attached no more than 4 cm from the base of the eaves board;
6. attaching the ridge and components.

The quality of the lathing has a direct bearing on the roofing’s functional indicators.

When installing the sheathing, keep the following subtleties in mind:

• Before installing the sheathing, measure the diagonals and sides of the roof using ropes attached at the corners. Their equality ensures the correct shape of the roof;
• if the length of the timber is shorter than the width of the roof, then the fastening of the boards should be done in a checkerboard pattern;
• the height of the boards at the joints of the end parts must be the same .

Depending on the roof’s angle, the sheathing’s pitch

The covering installation will be interrupted if all the guidelines for installing the sheathing are not followed, which could have unfavorable effects. How can I lay ondulin without making any mistakes? Let’s go into more depth about this.

How to properly attach ondulin to the sheathing

Ondulin is not a material that takes a lot of time or expertise to install.

It’s not too hard to install Ondulin yourself. Rules for fastening:

• Before covering the roof with ondulin, you should determine the compass rose, and start covering from its opposite side;
• how to lay ondulin on the roof? To ensure even fastening of the ondulin sheets along the timber, a longitudinal line should be drawn before installation, which will become a guide for laying sheets;
• weather conditions affect the quality of installation: ondulin is placed when the thermometer is positive, but not more than +30°C;
• when moving on the roof, you should use a ladder or special bridges;
• to facilitate sliding when cutting the blade, the hacksaw should be moistened with water or oiled;
• for even markings on sheets, it is advisable to use the edge of another sheet or a rope, and draw a line with a colored pencil (different from the color of ondulin);
• The ondulin sheet should not be stretched by more than 1 cm, otherwise, when the temperature drops, it may become deformed;
• When covering the roof, it is imperative to install ventilation, which will save the wood and layers of insulation from the formation of condensation. In this article we talked in more detail about fixing ondulin.

When following the rules for attaching ondulin to the sheathing, the service life of the coating increases significantly.

Ondulin is affixed with nails in a checkered design.

When basic installation guidelines are broken, the coating frequently loses its properties. Prior to learning the proper way to lay ondulin, you must determine the roof’s angle.

Roof angle for ondulin

The width of the overlap of the sheets along and across the sheet depends on the pitch of the sheathing, the laying pattern, and the angle of the roof.

The coating technology is determined by the slope angle.

A continuous sheathing is built when the angle of inclination is less than 10°. For this kind of sheathing, plywood, OSB, or boards are the best materials. In this instance, the ondulin is laid along the length of the sheet with a 30-cm overlap in two waves.

The ondulin roof has a minimum slope angle of 6 degrees;

The overlap width should not be more than 20 cm, the overlap pitch should be 45 cm, and the overlap should be single-wave with a roof slope angle of 10-15°;

When the inclination angle exceeds 15°, the lathing pitch should be 60 cm, and a single-wave overlap should have an overlap width of no more than 17 cm.

Calculation of roofing on the roof

Calculating ondulin consumption ought to be done during the design phase. By doing this, needless expenses may be avoided. Instead of performing the calculations by hand, we advise you to use our roof calculator.

Standard Euroslate sheets measure 95 cm in width and 200 cm in length, respectively. Such a sheet has an area of 1.92 m³. The material’s usable area is calculated without overlaps and is available in the following sizes: 1.3, 1.5, and 1.6 square meters.

It is necessary to identify the following indicators in order to compute material consumption:

• useful area of ​​covering material. Depends on the angle of inclination. The multi-slope roof shape is calculated from the total area of ​​each slope;
• roof area. Determined by adding the areas of all slopes using mathematical formulas for figures (trapezoid, square, rectangle, triangle);
• number of sheets of material. Determined by dividing the area of ​​the entire roof by the usable area of ​​one sheet of material.

The roof area is calculated exclusively along the eaves overhang line, but not along the edge of the roof sheathing.

Accurately calculating longitudinal overlaps is crucial because it can drastically lower the number of trims. Since the ridge element will shorten the top row’s height, it is best to lay the sheets full length.

The accurate computation of ondulin requires a few more additions:

• when calculating, an additional 10% or 15-20% should be added respectively, to a simple roof or a complex roof with different angles and transitions;
• additional elements (ridges, valleys, gables, aprons around chimneys and windows, junction points) require additional coating with ondulin;
• When calculating ondulin of a mixed color scheme, you should schematically depict the roof design on a reduced scale and calculate the consumption of sheets of each color separately.

Accurately calculating the amount of euro slate needed for roofing is made much easier by special programs designed to calculate the consumption of covering material.

Ondulin – installation instructions

The covering should be laid gradually after the lathing is installed according to the inclination angle. Step-by-step installation of ondulin:

1. Ondulin laying begins from the edge of the roof;
2. if four sheets of ondulin were laid in the first row, then the second row will consist of three and a half sheets: the first sheet is cut in half crosswise and laid. Ondulin is laid on the roof overlapping the bottom row, the length of the overlap should be about 12 cm, and the side overlap should not be wider than one wave;
3. an article on how to attach ondulin sheets to the sheathing;
4. ridge parts should be attached on the slope to the additional bars of the sheathing. The fastening is made from inside the waves of the material connecting to the beams;
5. valleys (joining corners of slopes) are made from the original coating and must be attached to additional sheathing;
6. The roof gable is ensured by bending the edge of the covering sheet to the gable board. The length of the hem and the board must match;
7. the roof ribs are covered with gable or ridge elements;
8. the side joints that adjoin the wall, located in a vertical position to the joint, are decorated with a valley made of ondulin;
9. The roof fan is installed along the waves at their junctions. The fan base should not extend beyond the top sheet;
10. often a roof window is fixed to the roof, which is joined to the covering sheet, and the top sheet is overlapped;
11. to avoid gaps between the ondulin sheets and additional roofing elements, use a special filler;
12. installation of waterproofing and blow-through elements.

Installation instructions for Ondulin (tiles)

You now understand exactly how to lay ondulin. Regardless of the given roof design, every step of the roof covering process guarantees precise ondulin laying. The order of events guarantees a successful outcome.

Waterproofing and vapor barrier under ondulin

Ondulin producers advertise their product as a coating that eliminates the need for additional waterproofing or vapor barriers to be installed. They advise installing a waterproofing layer on the room’s (or attic’s) roof at the same time. Installing a vapor barrier membrane from the room side is something else we advise.

Extra ventilation and waterproofing components:

1. waterproofing of the roof eaves is provided by a special box, which is attached to the base of the sheet overhang;
2. ventilation is provided by ventilation pipes, which, like the window, are fastened with self-tapping screws along each wave of the coating;
3. to protect against insects, a ventilation comb is installed in the gap under the eaves;
4. the joints of the ondulin sheets are glued with tape produced by the coating manufacturer (Onduflesh);
5. the junctions of windows, valleys and other joints with the roof, cornices are also taped with adhesive tape;

Using your hands to lay ondulin: a comprehensive guide

Usually, vapor barriers are created by applying a specific type of material. The roofing pie should be filled with this layer.

For do-it-yourselfers and homeowners wishing to improve their roofing, we offer concise, detailed instructions in our guide on installing an Ondulin roof. This post breaks down the process into manageable steps, from prepping the roof surface to installing and securely fastening the Ondulin sheets. Whether you’re starting a new construction project or replacing an old roof, our simple instructions will help you build a long-lasting, weather-resistant roof that will increase the value of your house.

Useful video

A theme-based educational video about ondulin self-installation:

For many homeowners seeking an attractive and affordable roofing solution to improve their property, installing an Ondulin roof can be a sensible decision. Compared to conventional roofing materials, it is relatively easy to install due to its lightweight design. You can guarantee a seamless installation procedure and a sturdy roof that endures over time by adhering to these installation guidelines.

Because of their easy-to-interlock design, Ondulin roofing sheets require fewer sophisticated tools and installation methods. This simplicity lowers the overall labor costs related to roof installation in addition to saving time. Ondulin is a popular choice for both professional contractors and do-it-yourself enthusiasts because of its versatility and ease of handling, regardless of whether you’re starting from scratch or replacing an old roof.

Paying close attention to details during installation is essential to getting the most out of your Ondulin roof. Weather resistance and durability can be maintained by securely fastening each sheet and making sure there is enough overlap between them. Furthermore, caulking joints and edges keeps water from penetrating the roof, improving its endurance to different weather conditions over time.

All things considered, an Ondulin roof provides a blend of long-term durability, affordability, and ease of installation. You can take advantage of a dependable roofing solution that improves your home’s structural integrity and visual appeal by adhering to these easy installation instructions.

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