Is modern material, which is characterized by strength, high reliability, resistance to various climatic conditions and durability. Corrugated sheeting does not fade, does not require regular painting, and withstands the most various conditions operation.
A roof made of corrugated sheets perfectly protects the attic from precipitation, is easy to install and is relatively inexpensive.
In addition, corrugated sheeting is very attractive, it can be easily adapted to any style of the house and the surrounding area. In our article we will tell you how, what are the features of this process, and what is required for installation. We will also touch on the roof structure and tell you about all its components in more detail.
Roof structure
The corrugated sheet fastening scheme differs from many others in its simplicity. Such a structure can be built by only two or three people without special knowledge in a short period of time, without expensive tools. Most often, profiled sheets with trapezoidal corrugation (less often sinusoidal) are used for roofing, which are designed specifically for laying on roofs and for walls (but with certain thickness). The best material for this is a material with a metal thickness of 0.5 to 0.7 millimeters, with a galvanized coating and an applied polymer layer, which will make your roof bright and will not allow the colors to fade. The main components of a roof using corrugated sheets are:
- lining (these are special membranes, often rubber linings with a shape that follows the shape of the corrugation);
- sheathing and wooden slats for ventilation space;
- cornice and roofing strips;
- snow bar and snow blowers;
- internal joints;
- through removals;
- seals for joints;
- ridge and end strips;
- elements for constructing valleys.
We have already spoken more than once about the more detailed purpose of each element and about calculating the angle of inclination of the slope; now we will only add that for high-quality styling required quantities of all materials, including additional elements, calculate in advance before purchasing. This is easy to do using simple mathematical formulas (you can also read about this in our articles on calculating the amount of corrugated sheeting for roofs).
Using self-drilling self-tapping screws for fastening
Any fastening of corrugated sheeting, no matter whether it is necessary for walls, fences, balconies or roofs, is carried out taking into account some features, which we will now talk about. This is not only the sheathing, purlins, but also fasteners. It is important to choose the right type of fasteners before proceeding with fastening. Many people believe that ordinary nails and aluminum rivets will be enough, but this is not the case. Moreover, the use of such fasteners is fraught with serious damage to the material. Roofing screws provide high fastening strength, protection from leaks and rain (absolute waterproofness). In addition, the use of such fasteners greatly speeds up the process.
It is worth noting that there are approximately eight screws for each sheet, and with the use of a screwdriver, installation becomes not only quick, but also easy.
When purchasing self-tapping screws, you need to pay attention to their quality. First of all, the sealing washer must be made of zinc-plated carbon steel or stainless steel.
When fastening (the drill must have a torque limiter), a rubber gasket should protrude approximately 1 mm from under the washer. The parameters of roofing screws can be as follows: SW 4.8×28, 4.8×38; SL 4.8×20 (for overlap). The heads of the screws must have a collar and a height sufficient to hold them firmly in the bit. The sealing washers are made of aluminum, have a diameter of up to fourteen millimeters, the gasket itself is made of vulcanized rubber (or special elastomers). The head often has a colored polymer coating on top so as not to stand out on the surface. The tips of the self-tapping screws have a drilling part that penetrates through the sheet into the sheathing, which ensures strength and high reliability of holding the sheet.
The process of attaching corrugated sheets
Fastening corrugated sheeting, which is universal building material, is extremely simple. The same sheets can be used for roofing, facades, fencing, and garage construction. Of course, each of the designs has its own characteristics, but today we are talking about laying profiled sheets on the roof.
How to lay a corrugated sheet correctly?
One of the most important questions when constructing a roof: how to properly secure the corrugated sheeting to ensure the strength and reliability of the entire structure? First you need to decide for what purpose the roof is being built, whether it will be the roof of a residential building with a cold attic or a warm attic, or an outbuilding, the roof of a large industrial building, warehouse, store. The composition of the entire structure, the selection of a profiled sheet of a certain type and thickness, as well as additional materials. Most often, the universal profiled sheet “N” is used, which satisfies everyone necessary requirements; The thickness and height of the corrugation are determined individually. We must not forget that during installation, special self-tapping screws are used, which have rubber gaskets for regular sheets and tin gaskets for valleys. Remember that the roof ridge is attached only to the upper wave of the corrugation, while the rest of the area should be mounted only in the lower part of the wave. carried out only according to these rules and not otherwise.
Hydro- and vapor barrier
Diagram of waterproofing and roof sheathing for corrugated sheets
Don’t forget about installing a vapor and waterproofing layer, which allows you to protect the roof from precipitation. This layer will also help in cases where the temperature difference inside the house and outside causes the formation of condensation, which, when accumulated, can cause severe damage to the structure. At the same stage, it is necessary to arrange ventilation gaps to remove excess moisture and condensation, for which thin wooden slats are attached to the waterproofing film. Each node must be securely fixed.
Determining the pitch of the sheathing
Most often it is carried out on a wooden sheathing, the pitch of which can be different. It depends on the angle of the roof slope and the height of the wave. Let's look at the main options and rules.
- When the angle of inclination is more than fifteen degrees, the sheathing is performed in increments of thirty-five to fifty centimeters.
- If the angle is less than fifteen degrees, then the sheathing is continuous, and the corrugated sheeting for this is taken with the C20 marking. Adjacent sheets are laid with a slight overlap in one wave (up to twenty centimeters).
- At an angle of up to fifteen degrees and C35 corrugated sheets, the pitch should be from thirty centimeters, the same overlap is applied. And for C44 corrugated sheeting, the sheathing pitch is already from fifty centimeters.
- At an angle of up to twenty degrees, a small overlap of ten to fifteen centimeters is provided; the lathing can have a pitch of about thirty to forty centimeters.
- For very small slopes, up to twelve degrees, the roof design can be different, but it is mandatory to use silicone sealant for joints, they can additionally be secured with steel rivets.
The process of fastening corrugated sheets: rules for beginners
How to attach corrugated sheeting to the roof? All metal sheets fixed directly on wooden sheathing roof, which is screwed to the rafters, onto a layer of waterproofing or to steel purlins (with a corrugation height of at least 40 mm). You need to start work from the bottom of the slope with a slight overhang, three and a half to four centimeters. This will protect the walls from weather conditions (heavy precipitation). All self-tapping screws, as a rule, are screwed in strictly perpendicular to the plane of the roof; the formation of distortions is unacceptable. In total, there are two options for fastening profiled sheets: three sheets and four, while the roof is covered with unique blocks, which significantly reduces the duration of work and allows you to immediately straighten crooked sheets without dismantling the entire roof that has already been laid. We hope that our tips will help you in installing a reliable and very attractive roof made of profiled metal sheets. Such a roof can be made simple, one-color, bright, to match the style of the house itself, or with a beautiful geometric pattern of rectangles or stripes.
The problem of proper fastening of corrugated sheeting on the roof is influenced by many factors: the length of the slope, its slope, the rafter system, the quality of the material and many others. An important point will be what specific type of sheet is used, according to which the frame design for the sheathing is selected.
Before starting installation work, it is worth understanding all these nuances in order to really get a high-quality roofing deck that will withstand the warranty period.
What factors influence the laying of corrugated sheets?
There are several parameters that must be taken into account when assembling a roof from corrugated sheets. Failure to comply with them can lead to a reduction in the service life of the roof, as well as its leakage after a short period of time:
- Design rafter system. Under the corrugated sheeting, appropriate rafters and sheathing must be used. You should pay particular attention to this issue when using corrugated sheets intended for wall cladding. It is thinner than the others and can simply become deformed in winter. To eliminate this possibility, a continuous sheathing is used.
- The angle of inclination of the slopes. Corrugated sheeting cannot be installed on slopes of less than 8 degrees, although there are some manufacturers who recommend laying the supporting sheet with a slope of 5.5 degrees. Another nuance is overlap. On flat roofs it should be larger than on steep ones.
- Length of slopes. The easiest way is to cover the roof with corrugated sheeting if the length of the slope does not exceed 6 meters. If this parameter is larger, then it is more convenient to fasten the material in 2-3 rows, while observing the laying pattern and the technique of connecting adjacent rows.
Correct installation of profiled sheets
So, how to properly lay and fasten corrugated sheets on the roof and what should you know about this type of work?
- Installation should begin from the lower right corner, placing the first sheet with an edge overhang of no more than 50 mm, screw a self-tapping screw into the center, then, if necessary, adjust the position along the edges of the slope by turning the corrugated sheet.
- Next, attach the sheet upwards (if there is more than one row) or to the left if there is only one row. That is, the scheme is followed from bottom to top and from right to left.
- If there are capillary grooves, adjacent sheets are joined so that they coincide, otherwise gaps will form.
- Also, when laying adjacent sheets, be sure to observe overlap. In this case, all joints are treated with sealant and additionally fastened with self-tapping screws screwed into the wave.
- When moving on a roof already covered with corrugated sheeting, you should not step on the corrugated protrusions; shoes should be selected with soft soles, and your feet should be placed in the locations of the sheathing boards.
Important! With a short length of slopes (up to 6 meters), it is best to lay the sheets in one row. If this is not possible, in order to maintain the exact order, you need to tighten the marking cord.
Some experts advise doing the installation according to the pattern from right to left, increasing the rows after laying the bottom one. This option is quite acceptable.
When laying in several rows, it is very important to observe the overlap installation, having previously calculated it according to the angle of inclination of the slope.
How is the overlap of profiled sheets calculated?
The overlap of corrugated sheets is calculated at the roof design stage. After all, not only the tightness of the roof, but also the consumption of material depends on this indicator.
Exist online calculators, with which you can calculate cost options. However, no program can replace an accurate calculation for a specific roof, especially one made according to an individual project.
Specifically, you can be guided by the data given in the tables below:
For wall and load-bearing wall types of corrugated sheeting, the overlap can be estimated in accordance with the markings (and of course the thickness) of the sheet.
When laying roofing sheeting marked “NS”, it is best to make a calculation in accordance with the slope of a particular roof slope.
Important! When designing a roof, it is worth remembering that the greater the slope of the slopes, the higher the structure itself, and therefore its windage. As a result, with insufficient and not correct fastening strong winds can destroy the structure!
Types of corrugated sheet fastening
IN roofing works With profiled sheets, two types of fastenings are used: in the bend of the corrugation to the laths and in the wave when joining the sheets. How is this done and with what fastening materials?
Deflection fastening
In this way, the main points of fixation of the sheet to the roof sheathing are located. The material used is a 4.8×35 mm roofing screw with a hexagonal head or a standard one with a cross-shaped flange. Important feature screws is the presence of a rubber lining that ensures the tightness of the hole.
Screw the self-tapping screw strictly perpendicular to the sheathing into the deflection of the wave. It is necessary to ensure that the cap does not deform the gasket when tightened and is pressed tightly against the surface.
It is important to know that during fastening work there is no need to pre-drill the sheets. A high-speed drill will burn the polymer coating, and the metal under the screw head will rust.
Wave fastener
This is the second type of fixation; it is used to connect adjacent sheets in a row and fasten the orders together.
For fastening, the same purpose screws are used as for installation to the sheathing, but shorter – 4.8×20 mm. When screwed in, such a self-tapping screw reliably tightens two sheets of metal, but does not reach the gratings and does not deform the corrugated sheet.
There is an opinion that it is necessary to screw screws into the wave - the top point of the corrugated sheet, especially if there is a slight slope. This reduces the likelihood of leakage. In addition, in the spring there are many freeze-thaw cycles of water in the gutters. Under such conditions, the rubber linings on the screws will lose their elasticity much faster and simply rot. But the thickness of the rolled product in this case should be from 0.5 mm. These are the profile markings above - C44, HC-35, etc.
For fastening work, you need a screwdriver with an appropriate bit for a specific screw head. You can use a drill, but it must have a speed control so that the screwing is not too intense.
Fastening materials must be purchased in the required quantity, making preliminary calculations by consumption.
How to calculate the required number of screws?
Self-tapping screws will be required to secure the sheets to the sheathing and for fastening at the joints of adjacent elements and rows. Calculations are carried out based on the quantity per 1 sheet. But if large slope slopes are designed, count in pieces per 1 square meter.
For 1 profiled sheet
In the case of laying 1 sheet along the entire length of the slope, the attachment points will be located along the edges in each deflection of the corrugation and along its length in a checkerboard pattern. And also to connect to the adjacent element, screws are screwed into the wave with a pitch of 500 mm. Depending on the length and width of the sheet, the fastener consumption will be up to 18-20 pieces.
To calculate how many self-tapping screws are needed for 1 sheet, look at how many corrugation deflections there are on a given sheet and multiply by 2. You will get the required number for fixing at the bottom and top of the sheet. To this value we add 6-8 pieces, which will be used to fasten the middle part of the roofing element. Naturally, a reserve of 10-15% is required.
Per 1m²
When calculating the consumption of fastening materials per 1 square meter, it is recommended to proceed from the requirements - 6-8 screws per square 1x1 m. If the slope of the roof slope is designed steep, you need to add a few more pieces to this quantity.
V-shaped fasteners
This type of fastening is used for laying communication lines in buildings with walls and ceilings covered with corrugated sheets. For example, for installation of air ducts of ventilation systems.
The peculiarity of this type of fastening is that it is very easily adjusted to any type of corrugated sheet with various bends of the corrugated surface.
Installation and adjustment is carried out by marking the bending points of the V-shaped bracket, after which they are pinned to the protrusions. Such brackets are installed before laying the sheets on the frame, and installation occurs directly together with the corrugated sheeting.
Installation of the wind strip
Wind strips or soffits are designed to cover the gaps between the corrugated sheet flooring and the surface of the roofing pie. The main task is to protect the space from moisture, wind and birds. There are two types of soffits: cornice and front. Eaves are laid before the roofing is installed, and front ones are laid at the end of the roofing work.
- The planks are laid along the edge of the slope with an overlap of 100 mm, with the obligatory treatment of such areas with sealant.
- The spacing of the fastening points is 350-400 mm; the same roofing screws with a sealing lining are used as fasteners.
- The edge of the waterproofing film must be lifted and placed on top of the plank.
- The front strips are brought under the edge of the corrugated sheet and secured by screwing a screw through the flooring to the sheathing.
If the roof has a non-standard shape, then you may have to order wind slats according to an individual project.
Compliance with the basic rules for fastening corrugated sheets will ensure the service life of the roof within 40-45 years. And when carrying out preventive repair work and longer.
What do you need to know to attach corrugated sheets?
Thanks to such material as corrugated sheeting, in a fairly short time you can create a quite attractive and fairly reliable fence, roofing or facade structure.
That is why you should learn more about which fasteners to choose for corrugated sheets, how fasteners are calculated and what nuances there are that should be taken into account.
Speaking about the correct fastening of corrugated sheeting, it is necessary to place special emphasis on the simplicity of this fastening and the minimum set of tools that will be required. The material itself is quite economical. Only a minimum of costs will be required to cover even large areas.
Fastening methods of this material and fastening elements for corrugated sheets are selected based on the type of work process:
- finishing the fence;
- roof installation.
It's good to know that roofing sheeting is able to withstand the heaviest loads, because a special reinforced shape is used in its manufacture. In this regard, reliable protection of the entire space under the roof and, accordingly, any room inside the structure is ensured.
All this has a positive effect on the popularity of profiled sheets that are used for roofing. There are other factors that contribute to the great growth in popularity of this building material:
- extraordinary convenience and simplicity of the work process;
- high strength indicators;
- ease of handling materials for construction;
- light weight of the material.
Due to the fact that this material is light in weight, there is no need to strengthen the supporting structure before attaching the corrugated sheet to the roof. This contributes to a significant reduction in roofing costs.
Even a person who has absolutely no construction skills or special experience in matters related to construction can, if desired, attach corrugated sheets. In addition, this material is quite easy to cut and screw to most existing bases. Even severe frosts cannot interfere with installation, which can be considered as an additional advantage.
Items needed:
- several types of screws;
- corrugated sheeting;
- clamps;
- welding machine;
- screwdriver;
- sealant;
- jigsaw or metal scissors.
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Methods for fixing profiled sheets
First of all, you should know that it is quite important to screw in the existing screw correctly. Special screws can be used as fastenings for corrugated sheeting of all types (from wall to roofing). If you want to fix the corrugated sheeting more aesthetically, you need to use special screws for metal tiles.
During manufacturing, a special polymer coating will be applied to the heads of such self-tapping screws, the color of which will need to be matched to the color of the corrugated sheet that is used.
This way the screws will be able to blend into the general background. Due to the rubber gasket, which is located under the very head of the screws, moisture will not penetrate under the profiled sheets directly at the fastening points themselves. The screws must be screwed in strictly perpendicular to the sheet surface so that no distortions are allowed.
It is important to note that the most correct way to screw in a self-tapping screw is to screw it into a wave that will be adjacent to the purlin or will not be adjacent to the sheathing.
Profile sheets are attached to wooden logs using the most ordinary self-tapping screws, and in the case of fastening to metal logs, it is necessary to use special self-tapping screws, the design of which includes a drill. In some cases, rivets are chosen to fasten profiled sheets to a facade, roof or fence.
Transverse logs have the same appearance as the profile square pipe, to which the corrugated sheeting will be attached. Such logs are attached to the fence itself using clamps or by electric welding.
When such transverse joists are used during the construction process, this makes it somewhat easier main task, which is associated with fastening corrugated sheets.
When a fairly short time frame is allocated for fastening the corrugated sheets, welding can be used to fasten the profile sheets. However, during welding, it is necessary to ensure that the protective coating of this material is not too disturbed due to the actions high temperatures, and after completing the work that involves welding, you will definitely need to do anti-corrosion treatment of the profile coating.
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How to calculate the required number of self-tapping screws in order to fasten a profiled sheet?
The number of fastenings for corrugated sheets can be calculated by the most different ways, based on a variety of factors.
It is possible to divide the total area that will need to be covered by the total area of one profiled sheet (the overlap must be taken into account), and then round the result obtained to a whole number.
It is possible to simply divide the total perimeter of the area being designed by the width of one profile sheet. If this is a fence that is joined, for the calculation it is necessary to take the installation width with obligatory consideration of the overlap. General consumption figures for profiled sheets may differ slightly (by approximately 10%). For wall and roof areas on which the profiled flooring will be fixed, traditionally 8 screws are used per 1 square meter. m. However, it is recommended to double the number of screws near the ends, slopes and ridge in order to ensure high reliability and resistance to existing wind loads.
The fastening step of the corrugated sheet is 50 cm.
The number of self-tapping screws needed to complete the construction of a fence will depend on the height of the fence being made. In this case, the quantity can be selected exclusively experimentally.
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How to properly attach corrugated sheeting to the roof?
You need to know the main steps that must be followed sequentially in order to correctly attach corrugated sheeting to the roof of an existing house.
First of all, the profile sheets are laid out in the required order so that the amount of overlap of the profiled sheets depends on the existing roof slope angle (the greater the slope, the less overlap is necessary). The largest overlap will be approximately 20 cm and can be selected for a roof slope that does not exceed 15°. However, when the slope exceeds 30°, the overlap will automatically decrease to 15 cm.
If the roof slope is critically small (less than 10°), additional sealing of the sheet floors must be performed.
Next comes the installation of the sheathing. The size of this element should be selected based on the roof slope angle and the wave height of the corrugated sheeting (the greater the wave height and roof slope angle, the larger the pitch for the sheathing should be selected). In addition, these indicators will influence the number of waves that the overlap includes. When the roof has small wave heights or a small slope, the overlap must necessarily include at least 2 waves.
When laying each subsequent row, an overlap of 20 cm must be observed.
Some nuances should be taken into account:
- self-tapping screws should only be screwed into the profile cavity of the corrugated sheet;
- ridge screws differ from roofing screws in length;
- When manually tightening self-tapping screws, the force applied must be correctly calculated so as not to damage the insulation layer and prevent loose tightening.
Roofing type corrugated sheeting provides reliable protection roofs from bad weather and comfort in the house. For this purpose, it is important to correctly fix the material on the roof, following the right technology and using high-quality fasteners.
The best fasteners for corrugated roofing
Profiled metal sheets are convenient for installation as roofing, as they do not require complex actions. To properly fix the coating, you should choose a reliable fastening option. This is necessary to ensure the material’s resistance to strong winds and snow load, and also to prevent roof leaks.
When properly fastened, corrugated roofing will last about 30 years.
When laying the covering, holes have to be created in each sheet through which moisture can enter the under-roof space, leading to metal corrosion, mold and mildew. Therefore, during installation, use only special fasteners, which has a thoughtful design to eliminate such consequences. To ensure maximum strength and durability of the roof, galvanized self-tapping screws with a wide head, larger than that of a conventional self-tapping screw, are used. Additionally, craftsmen install rubber seals in the form of rings, which protect the structure from moisture getting under the coating.
Roofing screws provide the highest quality fastening of corrugated sheets
Self-tapping screws equipped with a polyurethane or rubber press washer prevent the penetration of moisture into the fastening holes. The caps of the elements can be painted in different colors, which allows you to select details to match the roofing. With the help of such fasteners, you can firmly fix sheets of metal without damaging the protective layer, causing cracks and holes. The length of the roofing screws should be in the range from 25 to 250 mm, and the thickness - 6.3 or 5.5 mm.
The color of the visible part of the roofing screws can be matched to the base coating
Nails, ordinary self-tapping screws, welding and other similar methods should absolutely not be used when installing profiled sheets on the roof. This will significantly shorten the life of the coating and lead to leaks.
Video: review of a set of roofing screws
How to attach profiled sheets to the roof
Simple installation makes profiled sheets popular for creating roofing coverings. However, there are several rules governing this process. Before work, you should consider the following features:
Preliminary work
Under metal coating Moisture accumulates on the roof in the form of condensation, which leads to rotting of the structure. Therefore, before creating the external coating, preparatory work should be carried out:
- Installation of vapor barrier. A protective layer that prevents the escape of moist air vapors from the room is installed from the inside under the roof. To do this, the vapor barrier membrane is carefully laid in each corner and fixed construction stapler and staples. Mounted on top of the membrane interior decoration premises.
The vapor barrier membrane is attached to the rafters on the room side
- Roof insulation. Insulation is placed above the vapor barrier layer, for example, mineral wool. Plates of material are placed tightly between the rafters. Sometimes it is more convenient to first lay the insulation, and only then attach the vapor barrier film.
Insulation boards are laid tightly in the joints between the rafters without any fasteners
- Counter-lattice device. On the outside, a sheathing and a waterproofing film are installed on the insulation, protecting the attic space from moisture. A counter-lattice should be installed on top of the waterproofing, ensuring vent, through which excess moisture is eliminated.
The waterproofing film is laid along the rafters and secured with transverse bars of the counter-lattice.
- Installation of sheathing. The main sheathing is attached to the bars laid along the rafters, on which the corrugated sheets will be laid.
The presence of an additional layer of counter-lattice bars allows for a ventilation gap under the metal sheets, which will help remove condensation during the cold season
Methods and features of fastening profiled sheets
Fixation of profiled sheets on the roof is carried out according to general technology, some aspects of which can be adjusted depending on individual characteristics roofs. The main points of working with corrugated sheets are as follows:
- To cover the roof, solid sheets are used, the length of which is approximately 5–10 cm longer than the length of the slope. If it is impossible to order material of this size, then the elements are joined along the length with an overlap of 100 to 250 mm, depending on the angle of the roof;
- when installed on a roof with a zero or very small slope, the elements are placed with an overlap of 200 mm and using a seal that prevents moisture from getting under the sheets;
- At the bottom and top of the sheathing, corrugated sheets are fastened in every second wave, and in the middle of the roof the fasteners are installed every two or three waves;
- in longitudinal joints, self-tapping screws are installed in increments of no more than 50 cm;
- the average number of screws for every 1 m2 should be 6–8 pieces.
Step between fastenings of profiled sheets
When installing sheets, it is important to consider not only their location, but also the step between fasteners. This parameter affects the quality of the coating. For example, an excess of self-tapping screws, located very often, will lead to deformation of the sheets. As a result, it deteriorates appearance roof, its performance characteristics are impaired. Therefore, screws are screwed only into the lower part of the wave that is in contact with the sheathing.
Self-tapping screws are installed strictly perpendicular to the sheathing at the bottom of the sheet wave
When distributing fasteners over a sheet, it should be taken into account that the maximum step between the screws should be 50 cm. In this case, in the central part of the sheet, fasteners can be installed in a checkerboard pattern, maintaining a distance of 50 cm. If the corrugated sheet requires more reliable fixation, then it is permissible to fasten the sheet along edges into each lower wave. At the ends, self-tapping screws must be installed in each line of the sheathing to ensure the strength of the coating.
Corrugated sheet installation diagram
In order to avoid mistakes in work, professional craftsmen advise not only to take into account the basic rules, but also to study the layout of the screws on each sheet. This makes it possible to avoid serious damage to the seal of the coating as a result of using too much large quantity fasteners or screwing in an insufficient number of elements.
Self-tapping screws should not be screwed in too tightly or unevenly.
For sheets with a thickness of less than 0.7 mm, lathing with a pitch of about 50 cm is suitable. If thicker corrugated sheeting is used, the distance between the rows can be increased to 1 m. This approach allows you to create a reliable base and ensure the strength of the roofing. At the same time, they comply general rules fastener location.
At the junction of the sheets, screws are screwed into each wave, in the upper and lower parts of the slope - through the wave, and in other places at the rate of 8 screws per square meter of coating
Step-by-step installation of corrugated sheets
Corrugated sheeting is easy to install on a simple gable roof, if the roof has many inclined planes, then the sheets are carefully cut with special scissors. Using a grinder or saw is strictly prohibited, as this will lead to the formation of uneven edges and damage to the protective layer of the metal. The following steps are followed:
- The first sheet is laid in the lower area of the end with a pre-calculated projection beyond the edge of the cornice (5–10 cm). The entire bottom row is mounted in this way, with self-tapping screws installed along the bottom through the wave, and along the edges - every 30–40 cm.
- The sheets of the top row are attached with an overlap on the bottom. If the slope angle is less than 15°, then be sure to treat the joints with sealant and fix the seal. Every sheet element They are attached to the outer slats, which the sheet reaches, and the remaining fasteners are installed in a checkerboard pattern in the middle. The screws are fixed to the bottom of the wave and must be kept perpendicular to the sheathing.
Sheets of corrugated sheets are installed from bottom to top, gradually moving from one gable to another
- At the ends hip roofs or roofs of complex shapes, the sheets are cut to the required shape and fixed to the sheathing with self-tapping screws. Upon completion of the work, components are installed, for example, an end strip, a valley, a drip edge, etc.
If there is no provision at the end of the roof gable overhang, then it is covered with an end strip
Video: installation of profiled sheets on the roof
Possible errors when installing corrugated sheets on the roof
Installing a roof with profiled sheets is simple and accessible even for inexperienced craftsmen. The technology for fixing metal does not require complex actions, however, during the work process, the basic rules should be taken into account. In this case, the following situations and errors can often arise, which can be easily avoided:
Fastening profiled sheets is simple, but only careful adherence to technology will ensure the roofing covering durability and reliability under any load.
Corrugated sheets in quality roofing material everywhere it is crowding out the usual asbestos-cement. This is not surprising - the material is much more practical, cheaper, lighter, easier to install, and simply more attractive in appearance. If the profiles are chosen correctly, that's all installation work carried out in accordance with the technological recommendations of the manufacturers, then in terms of reliability such roofing is in no way inferior to other types of coatings. And some shortcomings are more than compensated for by its affordability and speed of roofing operations.
Another advantage is that any home owner can build such a roof if he has at least a little experience construction work. It is certainly difficult to do without helpers, but with two or three people the covering can be completely installed in a matter of days. Of course, to do this, you need to understand the nuances of the main operations - how to make the correct sheathing and how to properly attach corrugated sheeting to the roof with self-tapping screws. These are the questions that will be key in this publication.
Briefly about corrugated sheets
So, what is corrugated sheeting? This term is commonly understood as profiled metal sheets, most often made from thin (up to 1 mm) sheet steel, widely used to create various enclosing structures in various fields of construction. There are also products made of aluminum or even copper, but this is a very expensive pleasure, and there is hardly any need to consider them. Moreover, the principle of performing roofing work does not really depend on the material of manufacture.
