What is a metal tile: classification by type of coating + features of its application in construction

Because of their robustness, aesthetic appeal, and adaptability to a variety of construction applications, metal tiles are a popular option for modern roofing. Metal tiles, in contrast to conventional roofing materials like clay or asphalt shingles, are made from metal sheets that are formed to resemble conventional roofing materials but have better performance features.

Metal tiles can be identified by their classification according to the kind of coating that has been applied to the metal surface. These coatings have several uses; they can be used to improve weather resistance or to create aesthetically pleasing options that resemble other roofing materials. Galvanized steel, which is covered in a layer of zinc to prevent corrosion, and painted metal tiles, which come in a variety of hues and textures, are examples of common coatings.

Because of their strong resistance to rust and corrosion, galvanized steel tiles can be used in a variety of climates and environments. Usually, these tiles have a zinc coating that serves as a sacrificial layer, shielding the steel beneath from airborne pollutants and moisture. Galvanized metal tiles are a long-lasting option for both residential and commercial roofing needs because of their durability.

Conversely, painted metal tiles offer a flexible range of colors and finishes to both builders and homeowners. In addition to adding visual appeal, the paint acts as an extra barrier against weathering and UV rays. This kind of metal tile is preferred since it can easily fit into various architectural designs and still provide the longevity and low upkeep of metal roofing.

Because they are lighter than conventional roofing materials, metal tiles are highly valued in construction as they can minimize structural load and installation complexity. Their interlocking construction guarantees a tight fit that resists strong winds and inclement weather, helping to stop leaks. Metal tiles are a strong, adaptable, and aesthetically pleasing roofing material that can be used for a variety of residential, commercial, and industrial projects.

Features of the production of metal tiles

Create a kind of cold-rolled sheet steel roof for the market with an average thickness of 0.5 mm. The sheets are driven through the rolling molding camp to reveal to her an amazing relief that mimics the steps and waves of the tiled roof.

In addition to improving roofing tin’s aesthetic appeal, molding also makes it more resistant to loads and mechanical impacts from the outside. Actually, steel profiled sheets are referred to in this type of roof. However, unlike corrugated board, there are transverse folds in addition to longitudinal crests.

Depending on the brand of material, the transverse fold spacing varies, but it is typically 35 cm. When building the crate for coating application, this indication must be taken into consideration. Ultimately, it makes sense and is more convenient to install the fasteners by the longitudinal bulge rather than by the way they are laid when laying corrugated board.

Tin roofing is multi-stage protected against atmospheric negative, chemical, and biological influences. The hot treatment with zinc or aluminum oxide is the initial step.

On both sides, the layers are applied directly to the forming forming sheets. For every square meter of premium roofing tin, at least 270 g of galvanizing are applied.

A polymer layer is placed on top of the galvanizing because it is not very resistant to outside influences and is more likely to interact with the molecules in the air and "be eliminated" naturally. It stains the coating a range of colors while shielding the galvanizing from damage.

Let’s examine the various coating types, compare and contrast them, and consider how the protective and decorative shell properties influence the choice of roofing material.

Polymer"s choice

Polymer compounds are used in the creation of all exterior protective and decorative coatings for a wavy steel roof. Because they must operate in various operational conditions and solve distinct problems, the polymer shells have different compositions.

Pe – polyester

The protective decorative shell was made using polyester dye. Some of its significant benefits include a wide range of colors, superior resistance to UV rays, and a longer warranty period as stated by the manufacturer.

Anywhere in the country’s latitudes can have a polyester-shelled metal roofing system installed. It maintains its operational characteristics at +120 °C even after withstanding frosts at -60 °C. Furthermore, it commands a reasonable price, which is highly sought after in both residential and commercial building.

It is imperative to exercise extreme caution when applying a polymer coating, though. This primer is put on a metal sheet in a layer of just 25 microns, with 5 microns taken from the designated layer. It is easier to accidentally scratch such a thin shell than it might appear at first. As a result, it is preferable to complete installation tasks without removing the polyethylene covering the exterior.

PEMA – Polyester matte

A product created using traditional polyester as a basis. This kind of coating creates an unusual and fascinating visual effect because its scales are superimposed in different directions when it is applied. The result is that there is no shine or glare on the metal sheet shell.

You can "deepen" the color optically and give it a certain noble, velvety quality with specific technologies. Its popularity is supported by the fact that metal tile with a matte polymer coating resembles natural construction ceramics more.

Matte polyester roofs cost more than their earlier counterparts. A 35 micron layer of primer is applied along with the protective and ornamental PEMA shell. It is more difficult to damage this coating during the application process.

PVC (PVC) – polyvinyl chloride or plastisol

One of the most striking exterior coatings not only adds a pleasing color to the surface, but it also creates a relief that mimics the texture of real materials. Since mechanical forces are the best means of opposing this kind of shell, the application layer extends to 200 microns.

The roofs are not vulnerable to harsh weather conditions such as acid rain, dusty winds, or corrosion because of the composition and thickness of the polymer protection.

The fact remains that PVC does not maintain color under the sun’s rays very consistently. It is advised to choose light-toned material for the roof device in consideration of the noted deficiency in the southern regions.

Pural – Pural

This is a polyamide-enriched polyurethane. A complex polymer connection’s constituent parts each provide solutions for their own issues. Although the total thickness of this shell is only 50 μm, it is much more resistant to mechanical influences and perfectly fulfills its responsibilities thanks to the introduction of polyamide.

The original color is preserved by polyurethane, which perfectly blocks UV rays. In the southern part of the nation, a purple-colored roof can be installed; it functions well at +120 °C.

As of right now, this is the most widely used material due to its excellent operational qualities and reasonable price.

Armacor – Armacor

Though Armacor’s corrosion stability is not as good as Pural’s, both have very similar technical, physical, and mechanical characteristics. On a metal surface, a thicker coat of primer is applied to increase it. In coastal communities, the metal tile with this protective shell is the preferred option.

Polyurethane is added to the coating to stabilize the coloring, which eventually permits the use of the material in southern latitudes. The same element guarantees resistance to a wide range of chemical influences, including acidic rains of all kinds, which frequently fall in industrial areas.

Pur – polyester thick -layer

This is a polyester that has been mixed with polyamide. Despite being applied with a layer as thin as 48 μm, the thick polyester shell is less resistant to sunlight and precipitation, which are characteristics of industrial regions.

Furthermore, if the home with this type of roof is constructed close to a chemical plant, rust spots will develop on it, and the rust will fade much more quickly than the backup.

PVDF – polyvinyl student

A complex polymer connection is also used to enhance the technical qualities that acrylic has altered. a pleasant and silky matte or glossy shell.

The largest collection of vibrant options is found in the range of roofs with the indicated decorative protection. You can create a very unique effect by using varnishes and multi-layer application technology. PVDF-coated metal tiles mimic gold, bronze, and aluminum extremely well.

One of the legitimate drawbacks is the inadequate mechanical strength, which is a result of the decorative protective layer’s application being too thin. Merely 27 μm is involved. But this roof handles rust and fading just fine.

Boiler house burning charcoal, exhaust gases, and acid precipitation are not harmed by metal tiles with PVDF or PVD 2F. The effects of salts and alkalis on the steel basis are flawlessly prevented by the outer shell. This is the ideal option for how urban buildings should be arranged.

Apart from the well-known and widely used protective and ornamental layers of steel roofing sheets, producers consistently present novel choices. For obvious reasons, formulas and obtaining technologies are hidden.

In addition to external indicators, the type of polymer used in the polymer’s manufacture and the size of the sheets on sale must be considered when choosing the material for the roof installation.

Format of supply of metal tiles

A metal relief roof is delivered to the buyer either as elements that have been cut to size or as sheets of a specific length. The range of standard measurements is 0.4 to 3.55 m. The length of the slopes plus the income for the cornice overhang and the five-semisantimeter overhanx on the cornice edge equals the number of sheets cut off by order.

The material’s width varies depending on the manufacturer; typically, it falls between 1.15 and 1.20 meters. Furthermore, two values are consistently indicated in the technical documentation: actual, or real width, and useful, or working width.

The most common sheets used in our nation’s construction materials have a useful width of 1.11 meters. This value is what the computations are based on. The width of the roof by the cornice or skate is divided into a useful width, and the result is rounded in more, so that the correct number of sheets can be purchased.

Why does the passport list two widths? The truth is that one tile wave is created by the overlap of metal roofing sheets along the side edges.

The edge of the adjacent sheet that is layered on top creates a pressure that is adequate for regular operation, stops wind breakdown, and guards against flowing.

Additionally, the capillary edge is intended to eliminate condensate beneath the overlap. Sheets are fastened to the crate and to each other along its length. The fasteners are positioned beneath each tile relief step on this line. The sheet itself is attached. It has a checkerboard pattern with 12–14 points, but each must be precisely under the step.

Features of a metal roof device

Every producer of the presently well-liked metal tiles creates a variety of extra components for installing and setting up the roof. Along with cornice and pediment planks, skates, yendovs, and adjacency junctions, the assortment also includes self-tapping screws with sealing washers and linear seals that unmistakably replicate the contours of a relief roof.

Installing dobages gives the roof a finished appearance, seals off the convex and concave roof ribs, hides unsightly cuts near roofing passageways, and prevents airborne water and dust from penetrating beneath the coating.

Make a reservation right away that waterproofing is required when the metal roof is installed. This is caused by the condensate that will inevitably form; in order to remove it, ventilation ducts must be installed.

Under the sun’s rays, a metal roof warms up rapidly and can occasionally cool down in the evening. Water settles on the inside of the steel coating due to the indicated temperature differences, which aids in the formation of fungal colonies and the appearance of rust.

Metal sheets from the insulated and unscarried system divide the counter-bruck, a distant functional crate, in a neatly organized roofing structure. In short, the first row of reshetin fixes the waterproofing, membrane, or basic polyethylene layer that is laid on the rafters.

Now, build a rarefied crate with waterproofing on top of the bar, the step of which should match the spacing between adjacent waves of metal tiles. Simultaneously, the counterpart in a tandem with a crate creates channels and vents along which condensation is expelled from beneath the roof with a fixing function.

For cold roofs with metal tiles, reinforced polyethylene or vapor-permeable polymer membrane works well as a waterproofing material. It is not possible to use only tola, roofing material, and new types of waterproofing with bitumen content in the schemes with this material, even though a brown distance has been created. It is strictly forbidden to make direct contact.

A vapor permeable membrane serves as a waterproofing layer in roofs with attic insulation. Condensate and household evaporation can freely exit the insulation, but atmospheric water cannot pass through the insulation’s thickness.

Classification by Type of Coating Features of Application in Construction
Matt Easy to install, lightweight, suitable for residential roofs
Gloss Durable, provides enhanced weather resistance, often used in industrial settings
Semi-gloss Combines durability with aesthetic appeal, versatile for various architectural styles

Metal roofing tiles are a popular choice because of their strength and visual appeal. They are available in different varieties based on the coating they have, and each has special advantages for a range of building requirements.

Zinc is applied to galvanized metal tiles, giving them exceptional resistance to corrosion. This qualifies them for high humidity regions or coastal settings where exposure to salt is an issue. Long-term building protection is ensured by their resistance to rust.

Metal tiles with an aluminum coating have good durability combined with being lightweight. They are frequently picked because they are simple to install and maintain and because they are resistant to corrosion. The reflective qualities of aluminum can also aid in keeping interior building temperatures lower.

Stone-coated metal tiles combine contemporary durability with classic beauty. Usually, they are constructed from aluminum or galvanized steel with an acrylic foundation and chips of real stone. This kind of tile is well-liked for both residential and commercial applications since it offers strength and a wide range of aesthetic options.

Choosing the appropriate roofing material for a project depends on knowing the various kinds of metal tiles and their coatings. Metal tiles are a flexible option for a range of construction requirements, regardless of the importance placed on durability, visual appeal, or environmental considerations.

For your article titled "What is a metal tile: classification by type of coating + features of its application in construction," the following is your main thesis statement: Metal roofing tiles are a multipurpose material that can be classified by several coatings, each of which has special benefits for building. This article examines how metal tiles are categorized according to their coatings, emphasizing the advantages and particular uses for them in roofing projects.

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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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