If you decide to use metal roofing as a covering material, then it will be necessary to carefully study the installation technology, and not only the roofing itself, but also the crate system.
Features of the calculation
The step of the crate under the metal tile should be chosen with an eye to some factors. Among them, one can distinguish the types of roofing, it is important to pay attention to its profile. Be sure to take into account the step between the location of adjacent elements, which, as a rule, is indicated in the instructions by the material manufacturer. In order to determine this parameter, it is necessary to measure the distance from the lower edge of the first board to the upper edge of the second. The step of the battens under the metal tile will also depend on the slope of the ramp, as well as the width of the ledge of the roof beyond the boundary of the starting bar of the system.
The master must decide before the start of work whether the structure will contain a drain, as this affects the calculations. If the drain will be fixed to the frontal board, then 30 millimeters must be added to the ledge. Among other things, the gutter for the gutter will play a role, and more precisely, its diameter. Thus, if its value is equivalent to 90 millimeters, then the protrusion will be different from the case in which it is equal to 120 millimeters. The measurement of the protrusion of the roofing material should be made from the frontal board, while the slope of the slope will depend on how much you need to release the metal tile. If you make a mistake, it can adversely affect the determination of the correct location of the crate. With this position of the roof, the material will not coincide with the elements of the crate system.
Determining the distance between elements
The step of the crate under the metal tile should be determined taking into account the presence of endows, while measuring the parameters and fixing the crate should be from top to bottom, taking into account the length of the tail of the system. In some cases, due to the presence of a long tail, there is a need to install an additional board of the crate system, which is necessary for rigid fixation of the plank of the ridge.
Mount Features
Before starting work, you should think about which step of the crate for the metal tile will be selected. It is also important what materials will be used. Thus, for rafters, a beam should be used, the cross section of which is 150 x 150 millimeters, which is the minimum indicator, but for a crate, a beam of 25 x 100 millimeters should be used. It is important to install not only the crate, but also the counter crate, for it you need to use a board with a cross section of 25 x 50 millimeters. The distance between the rafters should vary from 600 to 900 millimeters. The first board should be located in a straight line along the cornice, but you must not allow it to be strengthened with a ledge.
Specialist advice
The step of the battens for the metal tile should be selected so that the distance from the board protruding beyond the cornice to the next element is less than 50 millimeters compared to the rest, that is, this parameter should be 300 or 400 millimeters. The distance between the following components of the crate should be equal to the step between the nearest upper points of the profile, i.e. 350 and 450 millimeters. The step between the boards of the crate should be equivalent to 350 millimeters, with the exception of this rule, the first and second boards enter. To analyze how correctly the distance between the first elements is determined, it is necessary still on the ground. To do this, parallel to each other, two workpieces must be placed at a certain distance, you can bait them on the crate itself. Then, a tile sheet is applied to them, which will determine the most suitable length of the protrusion of the roofing.
Possible mistakes
If the step of the crate was not determined correctly, and the ledge turned out to be too long, this will lead to the fact that water will overflow over the edge of the gutter, while with a short ledge, water will flow between the gutter and the windshield. With a long protrusion, the sheet may deform under the weight of snow. Roulette should be used for marking. After it is necessary to fix the end and ridge levels. The wind bar should be located above the crate. In order to make it easier to strengthen the skate, additional boards measuring 25 x 100 millimeters should be fixed in the right place.
Summarizing
As you know, the most difficult to determine the distance between the elements of the frame system. What should be the step of the lathing under the metal tile, you must know, because otherwise the roof system will not be reliable. For the reason that it is recommended to fix a sheet of roofing material in the lowest part of its wave, the distance between the components of the battens should be selected depending on the step of the material profile. As the optimal and standard dimensions of the transverse wave of the metal tiles are 300 and 450 millimeters. When calculating the distance between the boards of the crate, you should focus on this particular indicator.
Features of the crate
The step of the lathing under the Monterrey metal tile will be the same as for the traditional material. Before performing work, it is necessary to measure the distance between the rafters. Thus, the length of the board or bar, which will form the basis of the crate, will be equal to the indicator, which is a multiple of the distance between the rafters. It is necessary to choose wood for the system so that it is well-dried under natural conditions, and also thoroughly saturated with an antiseptic. Additionally, the elements can be independently treated with flame retardants. Depending on the configuration of the system, a 24 x 100 millimeter board should be used as the material for the battens for a roof slope of 15 to 60 degrees. The pitch between the rafters should be equal to 1200 mm. A 36 x 100 millimeter board should be used if the distance between the rafters is greater than 1200 millimeters. This is also true for the case when a metal tile is used, the thickness of which is 1.5 millimeters.
When the step of the crate for the Grand Line metal tile (or any other) is determined, you can proceed with the acquisition of materials. Thus, if the roof has a non-standard configuration, then 40 x 60 millimeters should be used. In this case, the rafters will be laid with a significant step. The lathing can be continuous, while using chipboard or plywood. This material is combined with a crate made of a bar. This statement is true for complex areas of the roof, for example, the adjoining area, cornices, ridge or valleys. The calculation of the step of the crate for the metal tile is made according to the same technology if it is supposed to use a metal profile that can replace wooden elements. This decision justifies itself when there is a need to achieve high fire-fighting properties of the roofing system.
Material determination
If you will strengthen the crate under the metal tile, we take the right step, this is very important. But it is also necessary to calculate the amount of materials. To do this, the number of rows in the grid must be multiplied by the number of boards in the row, and then two more. In the end, you will get the right amount of lumber, which should be purchased to perform the crate. For the reason that lumber is sold, as a rule, in volumes, the number of boards must be converted to cubic meters. To do this, the geometric dimensions, which are expressed in meters, need to be multiplied, and then multiplied by the number of boards determined by the calculation. It is preferable to purchase the material with a certain margin, which will be necessary if some elements turn out to be defective. If we are talking about a roof of complex configuration, then the calculation should be carried out for each section of the system separately.
Finally
You can determine the step of the crate yourself by reading the article, but this is only a small part of success. It will also be important to correctly carry out installation work, following the technology. Only in this way the calculations will be justified, and the whole system will be distinguished by strength and durability, as well as an attractive appearance.