Lathing is a system that is used as the basis for the installation of metal tiles. The frame should consist of boards of the same size. It is important to comply with other recommendations of the technology of its installation, because the design will become an important element of the roof and will ensure its durability and integrity. The crate can be called the foundation of the roof and the key to peace of mind of the owner of the house, which can be achieved with reliable and proper fastening of the system.
Board preparation
Before you make a crate for metal, you should prepare boards. Their parameters (even in one batch) may vary slightly in thickness. In practice, it turns out that the units will have a thickness of 25 to 35 mm when the supplier indicates a parameter within 30 mm. Such a deviation can be called a familiar phenomenon, and more accurate dimensions are only found in planed and calibrated boards. However, if you arrange a crate for metal tiles from this material, then the budget will increase several times.
Determination of the step of the crate
If you, like some owners of private real estate, have wondered how to make a roof crate for a metal tile, then you need to determine the distance between the elements. The step will be affected by the type of coating, or rather, the profile. With what distance from each other to fix the boards, you can find out from the manufacturer's instructions for the covering material. To determine this parameter, measurements should be taken from the lower edge of the launching board to the upper edge of the one that follows it.
If you have a question about how to make a crate for a metal tile, you should know that the distance between the starting and the following elements should be less. The distance between the boards will also be affected by the slope of the slope, as well as the width of the ledge of the roof over the bar of the frame. The effect on the calculations will indicate the presence or absence of a drain. Its linear dimensions can also lead to changes in values.
If the gutter is attached to the frontal board, then about 30 mm must be added to the protrusion. An important parameter is also the diameter of the gutter for the drain. If its value is 90 mm, then the protrusion will be different from the one whose diameter is 120 mm. You can measure the width of the protrusion of the covering material from the front board to the cut of the rafter system. The steepness of the slope of the slope in this case will depend on how much the sheet of metal should be released in order to obtain the desired result.
When a question arises before a builder about how to make a crate for a metal tile, he should know that there is no way to make a mistake in the calculations. After all, if this happens, it can lead to improper location of the crate, the elements of which will not coincide with the installation points of the screws.
In order to determine the step between the first two planks, you should lay the rule on the rafter system, then measure the distance between the upper edge of the first wave and the lower part of the metal tile, this will allow you to make a mark. The rule at the next stage is put forward by the length of the sheet, it is necessary to attach a square to the frontal board and mark the point where the protrusion should be. A line is drawn from the edge of the frontal board to the marked level.
The thickness of the lower strip should be done more than the rest, this will eliminate the sagging edge of the covering material. If you faced the problem of how to properly make a crate for a metal tile, then you should pay attention to the pitch of the transverse wave of the material. These values will be equal. But between the first and next boards, a distance of 230 mm should be maintained. If the step of the shear wave increases to 350 and 400 mm, then you will need to remove the first two boards from each other by 280 and 330 mm, respectively.
Procedure for installing the frame system
Before you make a crate for a metal tile, you must prepare a bar for rafters. Its minimum size is 50x150 mm. For the crate, boards of 25x100 mm are prepared. If the system will include a counter-lattice, then it will need a 25x50 mm board. The pitch between the rafters should be equal to the limit of 600 to 90 mm.
The starting board should be along the ledge, it is important to prevent it from protruding overhang. Many novice masters are wondering how to properly make a crate for a metal tile, you can step by step study this process if you read the article.
The distance between the elements is selected in such a way that the step from the board extending beyond the cornice is 50 mm less than the distance between the other slats. Make sure that this option was selected correctly, you can still on the ground. To do this, two trim boards are parallel to each other, and then a fragment of the covering material is superimposed on them. This will determine the length of the protrusion to ensure the flow of water.
If the protrusion turns out to be too long, this will result in overflow of water over the edge of the gutter. With a short protrusion, fluid will flow between the windshield and the gutter. A long ledge also contributes to the deformation of the canvas under the weight of icicles and snow. If you, too, were among those who thought about the question of how to make a roof crate for a metal tile, then you must prepare a tape measure for marking. It is necessary to act in this case from the first board, which goes onto the cornice.
The next step is to fix the ridge bars. The windshield should be located above the crate. Its height ranges from 35 to 55 mm. These values correspond to the height of the profile of the roofing material. To simplify the work of fixing the ridge in the right place, you need to place additional boards, the cross section of which will be 25x100 mm. Additional elements should be fixed in the place where the chimney comes out.
Bracket Installation
Before you start laying sheets of metal, you should fix the brackets. They are necessary for screwing gutters to them. Between adjacent brackets, a pitch in the range of 500 to 600 mm should be maintained. Brackets are installed on both sides. They are fixed in such a way as to provide a slope of the gutter at 3 °. To check this value, use a cord and a building level.
An eaves strip is installed in advance, located along the eaves overhang. After installing the brackets, you can begin to nail the bottom board of the crate. The cornice strip is fixed to it, while it is important to ensure that the lower edge is overlapped by the edge of the gutter, which will ensure the flow of condensate from the bar into the gutter.
When can I abandon the crate
A self-supporting metal tile is presented for sale, the shape of which allows the installation of sheets without first installing the crate. Each product has stiffeners, which are formed by pressing. This allows you to get sheets whose width reaches 4 m. In this case, the metal does not bend, and the panel remains stable.
It is easy to install, and fixing is carried out on rafters, the distance between which should be such that it is possible to join the sheets in these places. Mounting is also allowed on the counter grill. The cost of this material is much higher, it is less common today. In this regard, the installation of a traditional metal tile will be a more advantageous option for a roof.
Difference of a metal tile "Monterrey"
Before you make a crate for a Monterrey metal tile, you need to familiarize yourself with its main differences. Among others, the possibility of using this material for roofs with a slope that exceeds 14 ° should be highlighted. A reinforced rafter system is not required, because the weight of a square meter is less than 5 kg. The thickness of the board under the metal tile can be equal to the limit of 27 to 35 mm.
Lathing for "Monterrey"
Before work, to ensure accuracy, it is necessary to calibrate the elements. The system does not have to be continuous. If between rafters a step is greater than 10 cm, then for a frame under a roofing it is necessary to use boards of more impressive thickness.
If you wondered how to properly make a crate for a Monterrey metal tile, then you should take into account the generally accepted section of the elements, which is usually 25x100 mm or 32x100 mm. This is true for boards. If you plan to use the bars, then their cross section may be 50x50 mm. For the lowest element, this value should be approximately 15 mm larger. The minimum value is 10 mm and is equal to the shear wave height.
Instructions for installing the first element. Step definition
The first element is installed parallel to the cornice, because the evenness of the first sheet of tile will depend on its correct location. If you decide to make a crate for a metal tile with your own hands, then you must calculate the step between the elements taking into account the shear wavelength, which is different for different models of metal tiles. Usually the required distance between the boards reaches 350 mm. Only the second should be laid, stepping back from the first about 280 mm.
Conclusion
In those places where chimneys, valleys are located, as well as around the perimeter of dormer and dormer windows, it is necessary to arrange a continuous crate. The last element is selected taking into account the height, which will be equal to the trimmed profile sheet. The latter should not bend during installation.