How to put slate on a roof

Are you considering installing slate on your roof? It’s a fantastic option in terms of both strength and style. Slate roofs have been valued for their longevity and inherent beauty for centuries. It’s crucial to comprehend the fundamentals of slate installation and the important considerations if you’re thinking about this option for your house.

To begin with, careful planning and preparation are necessary for slate roofing. Make sure the structure of your roof can handle the weight of the slate tiles before you begin. Since slate weighs more than other roofing materials, a strong framework must be in place. Speak with a qualified roofer to determine whether your roof is ready and to make any necessary repairs.

There are a few essential steps in the slate installation process. Usually, copper or stainless steel nails are used to secure each slate tile directly to the roof deck. Because of their ability to withstand rust and corrosion, these materials are selected to provide a stable and durable installation. To efficiently drain water and offer the best weather protection, the tiles are overlapped in a particular way.

Making sure the alignment and spacing are correct is one of the most important parts of installing slate. Slate tiles are not uniformly distributed like some other roofing materials are. Their thickness and shape can differ slightly, so careful attention to detail during installation is necessary to achieve a uniform and visually appealing appearance. Chalk lines and spacers are frequently used by roofers to ensure uniform spacing and alignment throughout the roof.

Maintaining a slate roof is not difficult, but it is necessary to extend its life. Check the roof frequently, especially after bad weather, for any loose or cracked tiles. In order to stop water from seeping through and preserve the integrity of the roof, replace damaged tiles right away. Slate roofs provide dependable protection for your home as well as aesthetic appeal for decades, provided they are properly maintained.

Technical parameters of asbestos -cement slate

The production of asbestos-cement slate was outlawed by controlling organizations in developed nations approximately 20 years ago in response to an attack on the material. The material contains asbestos, which is regarded as a dangerous carcinogen, which is the reason. For a number of years, our nation opposed and then restricted the application of this kind of slate. Customers don’t understand why people living in homes with these kinds of roofs haven’t been diagnosed with cancer for decades. It appears that roofing material manufacturers are engaged in a competitive struggle, rather than putting public health at risk, which is the reason behind the prohibitions.

Why? In reality, asbestos is used to make slate, but it’s not the kind that builds up in the body (amphibol) and encourages the growth of cancer cells; instead, it’s safe for human health (chrysotyl). Chrysothyl is an acid that the body quickly excretes. Furthermore, a material can only enter the body when a chipper or slate maker in a factory cuts one; a house cannot, in theory, be dangerous. The production of wave slate adheres to GOST 30340-95.

What constitutes the slate

Prices for various types of slate


What technological features should the roofer know

There is a pretty extensive list of benefits for wave slate, but only two are verified by knowledgeable builders: they are reasonably priced and have a long lifespan. The second benefit is only available if all slate-laying guidelines are followed to the letter and there is no hail during the process. The roof will need to be replaced entirely after the city because it has enormous holes in it and resembles a sieve.

Disadvantages of asbestos -cement wave slate

There are a lot of them; you should become familiar with each one before making your final decision about the roofing material. This includes both objective challenges encountered during styling and operation in addition to technical specifications.

    Many manufacturers have a deviation of sheets from the correct shape, they are not rectangular, but rhombic. If you purchased such a slate, you must be prepared for problems during its styling. Each sheet will have to be aligned separately, shift a little, etc. D. The compounds will be uneven, you will have to choose a position with minimal deviations. During the purchase, it is recommended to carefully check the quality of the products, do not be seduced by a very low price. Often such virtual savings cause very real losses.

Slate sheets may not have the proper geometry.

Slate is difficult to install yourself because of the weight of the sheets.

At the same time, not everyone can move heavy sheets. The great weight creates another problem – you need to carefully calculate the rafter system. For example, if the total area of ​​the roof is 100 m2, then the load only from the slate can reach 2-3 tons. The slightest deviations from the existing technologies for the construction of the rafter system, low -quality lumber, weak compound nodes will certainly make themselves felt during operation of the house. And with minor deformations of the structure of the wave slate crack. If cracks on the crest – there are no big problems. And if it is between the waves, then it is necessary to make an urgent roof repair.

Breakage in the slate

Only skilled roofers are capable of handling wave slate; bitumen tiles or screw metal coatings can be adhered to by specialists with some real-world experience. The material is badly cut, it breaks under light loads, driving slate nails requires experience, etc. D.

Practical advice

We will explain what you do not need to do when installing a wave slate on your roof in order to spare inexperienced masters from irksome errors.

Painting of external surfaces

Many developers are dissatisfied with the slate roof’s design, so in an attempt to create a more attractive roof, some paint the sheets’ surface. Do it under strict prohibition.

Why? A consistent surface coating cannot be achieved through independent painting. There will be pale spots and saturated spots. When a slate roof is newly painted, the differences are not noticeable; however, over time, the roof will develop patches, with areas of different sizes and shapes appearing on it.

It is strongly discouraged that you stain slate by yourself.

There is an industrial stained slate in use today. There are two ways to paint it: either the surfaces of the completed products are painted, or dyes are added to the mass during manufacture. The first choice is far superior because it is stronger and has invisible chips. However, the cost is higher; quality comes at a cost. Painters use specific dyes that are resistant to strong UV light and seep into the slate’s head.

Color of a cipher wave

Special requirements for the rafter system

The angle of inclination determines the spacing between the leakage slats, but for the majority of gable roofs, you must meet the universal requirement that each sheet rest for at least four stripes. The crate ought to be sturdy, level, and perfectly flat. It is advised that you walk along the roof and stagger it with your hands before beginning any work. Slate sheets are in constant tension when placed in this position, making it impossible to level the plane of slopes. The slate is extremely brittle; even with minimal long-term force, it will eventually fracture rather than deteriorate.

Features of sheet mounting

Only amateurs drill the holes in the slate for fixation. In addition to taking a long time, this method of sheet laying makes it challenging to operate a drill and screw screws.

Avoid making holes in the slate.

Slate nails are used by experts to nail sheets.

Nails are used to secure the slate.

Nothing more needs to be sealed, so don’t use silicone or rubber gaskets.

Silicone sealing of the mounting site is not required.

You don’t have to be concerned about leaks or rust because slate nails have been using them for many years without any issues. The water does not flow where the hole is formed—it is on the wave’s crest.

One wave overlaps the slate sheets. Every sheet has a final wave that is thinner than the others to hide the joints of the docks.

Every sheet’s final wave is thinner.

It is this that the substance is applied to. The inscriptions should be sealed during laying by the following sheet. This shows where the roof should be located.

Always only one sheet is nailed into, the material is strong, and the lock functions flawlessly without the need for additional fixing. If you have never unclogged nails before, you should practice on extra roof tiles. Experience and confidence will show in a few minutes, and driving nails won’t be an issue.

How to defeat slate

Owing to the material’s extreme thickness, issues could occur in certain areas. There are two ways to raise the caliber of sheet masonry.

  1. The side edges of the rows lie on the same line. This method is used on small houses, requires more effort and time. To align the joints of the corners, their trim is done. How to correctly cut, we will tell you a little below. You can cut the sheets on the ground, but for this you need to have great practical experience in building roofs from wavy slate. Otherwise it is easy to get confused, cut the wrong sheets and make other errors.
  2. The side edges of the rows are shifted by one or more waves. The method makes it possible to work on the roof without a grinder, all preparatory measures are taken on Earth. The first row begins with a whole sheet, and the second with cut off and so on. Most often, sheets cut in the middle, so the appearance of the roof improves, but the final decision is made by the master on the spot. He takes into account all the features of the house and the rafter system.

Rooftop Schifer Laying Scheme

"In our slate roof installation guide, we outline the crucial procedures to guarantee a fruitful endeavor. Every step is essential, from setting up the roof substrate to choosing and installing the slate tiles. Everything from tool requirements and safety precautions to the right methods for aligning and fastening the slate tiles will be covered. This article offers helpful guidance to help you achieve a long-lasting, aesthetically pleasing roof, regardless of whether you’re a do-it-yourself enthusiast or a homeowner thinking about slate roofing."

Step -by -step instructions for laying slate

Sheets are laid in one line with angles cutting. It should be noted that cutting of angles is done more for the appearance of the roof than to improve operational characteristics. If the cuts are not done, then in the places of overwhelming four sheets the latter protrudes a little. The reason is a large thickness of the material. During trimming, two corners are removed and the plane is aligned. It is believed that if the trim does not make, then snow or water can be blown into this gap. Practice shows that such statements have no reason. Large overlap of sheets (at least ten centimeters) and the small dimensions of the gap (no more than 4–5 mm) exclude the blowing of snow and rain. But this technology is recommended by construction standards, it is better to adhere to it.

Step 1: Examine the rafter system’s dimensions and state. As previously stated, the coating has a significant mass, so the rafter system needs to be sturdy and stable.

Step 2: Place the board or pull the rope at the base of the rafter system. These components will determine how the sheets are aligned. It is preferable to use the board since it is much more convenient to work with and not only regulates the environment but also emphasizes sheets. Following the slate’s styling, the board is disassembled.

Step 3: Get the equipment ready. A hammer, a grinder with a diamond disk, and nails are required. Next, give the hats a coat of sealant if desired.

A roof sealant

Polyurethane sealant prices

Polyurethane sealant

It is advised to use self-tapping screws to fasten the slate sheets into pre-drilled holes. This is something that pros never do. There are no true operational benefits to this method; it just requires time and money.

Sensible guidance. From the leeward side, overlap the waves.

Step 4: Install the first row of slate, being careful to line up each sheet with the cornice. The type of drain system determines the overhang’s size. On one wave, there is overlap, and the inscriptions are hidden. Ten slate nails are needed for each sheet, and they are driven through two waves.

The second and third sheets must be cut in the corner areas; the first and fourth sheets should stay whole. How do I correctly cut the sheets?

    Draw a cutting line. One end of the line in the lower part of the first wave, and the second at the intersection of sheets. You need to draw a contrasting felt -tip pen. It leaves a fat and clearly visible line, which facilitates the process of performing work.

The sheets require that you make markings.

Using a grinder, cut the sheet

The sheet joints following cutting

An additional image of the connection location

If there is a desire, then under each nail you can drill a hole, with a diameter of 0.1-0.3 mm larger than the diameter of the body of the nail. The reverse side of the hat is coated with sealant and only then fix the slate. This technology enhances the strength of the tightness of the roof fastening. The fact is that the hole punched by a nail has one drawback – on the back of the slate, it increases in diameter and has the form of an inverted cone. As a result, the thickness of the slate near the hole is reduced, which has a negative effect on the strength of the roof attachment to the crate.

Schifer nail fasteners

The rationale for using the drill makes sense theoretically, but in reality, things are much simpler. The days of battery drills are long gone, and roofs built with a hammer and no drilling are still intact. A tiny cone protruding from the slate’s back is entirely covered by the hat’s large diameter.

Sensible guidance. Make sure to construct a special staircase so that you can move along the roof’s slopes. Working with it is safe and convenient, and it won’t take more than an hour in total. The stairway can be made out of leftover lumber or weld metal.

Step 5: Secure the skate row. If the roof is warm, leave a minimum of five centimeters between each of the skate’s slopes. To guarantee effective roof ventilation trunks, this is required.

Tie up the wind, horse, and cornice boards. The horse can be constructed on its own using galvanized steel or by purchasing a factory built of asbestos cement. It is up to each developer what option they want to select.

Sheet installation is still ongoing. Installing a mechanism to raise sheets to the roofand raise slates onto the roof The time-histome of a shipwright installs slate on a gable roof by laying slate on a different slope.

As an illustration, we used the most basic gable roof. If it’s more intricate, you’ll need to calculate the values for the different areas that are close to the walls and chimney.

Vital. Make every effort to abide by safety rules, cooperate with insurance providers, and construct equipment that facilitates easy mobility on roofs. It is strictly forbidden to work alone on high-rise construction projects; you shouldn’t put your health at danger.

Keep in mind that slate is a far harder material to cover a roof with than any other. The design is unlikely to satisfy the current standards of developers; these coatings work best on a variety of extensions. Regarding dependability and durability, there are no grievances.

After the speaker laying is finished, the spillway system installation can begin.

How to raise slate to the roof

A single sheet can weigh up to 35 kg, so it will take a lot of work to feed the material into the house. It is advised to create a basic device to make the process easier.

Step 1. Select two slats of the corresponding length. Spear parameters are approximately 50 × 50 mm, such dimensions will allow them to enter the waves of the slate and hold it in the right position. The length of the rails should be approximately 1.5–2.0 m more than the height of the lower slope of the rafter system. Due to this, the rails can be installed at an angle of about 60 ° –70 °. At such an angle, it is much easier to lift sheets – the minimum friction values ​​between slate and lumber. In addition, a large angle greatly reduces the load on the rails, the probability of their cracking during the transportation of sheets is minimized.

Step 2: You can create a unique grip to secure the sheet. This is a regular block that is roughly 20 centimeters longer than the slate. The leaf edge stop is positioned at the lower end, and the upper end of the rope is fastened to it.

An apparatus for raising sheets to the roof

Slate settles onto the slats, repositioning the waves. The capture is drawn to the roof by the rope while it clings to the lower end. Fixing long rails among themselves with any kind of board is advised to prevent them from shifting positions.

If you don’t want to spend time on electronics, you can lift the slate with a rope by positioning two regular boards at an angle. In order to accomplish this, you must wrap a rope around the slate on both sides, fixing the lower end to the upper vertical with a hook. If the rope is thrown in the middle of the sheet by someone with experience, it won’t move when being pulled.

Stacking slate on the roof

Preparing the Surface Ensure the roof deck is clean, dry, and free of debris before laying slate.
Sorting and Layout Sort slates by size and quality; lay them out in a pattern that fits the roof"s design.

Slate roof installation demands meticulous preparation and execution to guarantee long-term viability and visual appeal. Natural stone like slate has an enduring beauty and exceptional resistance to weather and fire. The roof deck must first be prepared, making sure it is smooth, clean, and structurally sound.

In order to stop water from seeping through, each slate tile must be overlapped when laying the slate, beginning at the bottom of the roof. The roof’s strength and water-shedding efficiency are both improved by this staggered pattern. To prevent the slate tiles from cracking, nails or hooks made especially for slate roofs are used to fasten each slate tile.

Furthermore, maintaining appropriate overlap and tile alignment is essential to the integrity and aesthetics of the roof. Depending on the pitch and shape of the roof, different installation techniques may be needed to guarantee a tight fit and adequate drainage.

Following the slate installation, focus shifts to the final details, such as flashing and ridge caps. These components not only improve the aesthetics of the roof but also offer vital waterproofing at joints and edges. Water runoff is kept out of vulnerable areas by installing flashing around chimneys, vents, and valleys correctly.

Last but not least, routine upkeep is necessary to extend the life of a slate roof. Finding broken or slipping tiles, examining the integrity of the flashing, and removing debris all contribute to avoiding expensive repairs and guaranteeing that the roof will continue to shield the house for many years.

Video on the topic

Schifer laying at the joints

How to lay slate on the roof to one person without assistants

How to fit the slate tightly

The roof is cut with slate! Professional edition

How to cut slate when laying | Densely even and beautiful

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Alexandra Fedorova

Journalist, author of articles on construction and repair. I will help you understand the complex issues related to the choice and installation of the roof.

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