When building a country house, budgeting is one of the most important stages that requires increased attention and care on the part of the developer. This article will show you how to use the roofing calculator to facilitate this process, as well as what parameters can be simplified using the calculator.
The calculation of the cost of a roof is associated with finding the golden mean between savings and the reliability and durability of housing.
That is why it is so important to make all calculations correctly and not to make even the slightest mistake that could lead to additional costs for repairs or unplanned maintenance in the future.
In order to use the roofing cost calculator, you should know exactly all the dimensions of the house under construction, and it is advisable to correct the dimensions indicated in the project by measuring the actual dimensions of the finished box, and only after that purchase materials for roofing.
In addition, you should check the geometry of the roof being built. After obtaining all the required dimensions, you can proceed to the calculation.
Calculation of the rafter system
Roof truss system assumes the weight of the roof structure, as well as the weight of the snow cover that falls on the roof in winter and the load of wind currents.
The load created by snow and wind can reach 200-300 kg/m2, this significantly exceeds the own weight of the roof.
In this case, the angle of inclination of the roof slopes plays a very important role: the steeper the slopes are, the more snow will come off the roof under its own weight, but the wind load will increase accordingly.
Therefore, when using a roofing calculator, one should take into account both the map of wind and snow loads, as well as the type and weight of the roof covering, thermal insulation layer, etc.
The most important parameters of the rafter system are their cross section and the distance between them (rafter pitch).
Various building rules and regulations regulate the maximum allowable values of these characteristics, in addition, to calculate them, you should either use a roof calculation calculator, or invite specialists with special experience and skills, since here it is necessary to take into account various loads and strength of the materials used.
over do-it-yourself roof rafters a layer of waterproofing is laid, pressed by counter-battens, on which the crate is fastened for laying the roof covering.
The characteristics of the counter battens and battens are chosen according to the material chosen for covering, as well as the method of attaching it to the batten.
Calculation of the roof pie
When calculating the roof, for example, calculating the hip roof, it should be borne in mind that it includes several layers:
- A waterproofing layer that serves to protect the heat-insulating layer and the space under the roof from the penetration of moisture and the formation of condensate on the inside of the roof covering. . For effective ventilation, a gap should be left between the coating and the waterproofing layer.
- A layer of thermal insulation, the thickness of which is determined by the norms in force in the given region. As a heat-insulating material, mineral wool is most often used, which does not require cutting and is purchased in packages, and not in the form of individual sheets. The slabs should be laid either end-to-end if one slab does not cover the entire area of the roof, or overlapped if several layers of material are laid.
- The vapor barrier layer is laid under the thermal insulation on the inside of the rafters to prevent moisture evaporating from the interior from entering the roof pie.When laying this layer, an overlap of at least 10 cm must be observed, which increases the consumption of material.
So, hip roof calculation finished.
Using the roofing calculator to calculate the roofing pie, it should be borne in mind that the materials purchased separately must form a single system that does not release heat from the room, respectively, they should be selected in accordance with the roofing used.
Roof coverage calculation
When performing the calculation of the roofing, you should be especially careful, since the roofing element is the most expensive.
It should also be borne in mind that in addition to the area of \u200b\u200bthe roof, its configuration plays a significant role. For complex structures, the calculation of the roof area becomes much more complicated, and the cost of 1 m increases.2 roofs.
Useful: in some cases, the total area of the material required for roofing can be much larger than the area of the roof itself.
It should also be taken into account that junctions and other complex elements require the purchase of additional devices, such as junction strips, valleys, etc., the cost of which can be compared with the cost of sheets of roofing material.
In addition, their installation requires the arrangement of a continuous crate, which also entails additional costs during the construction of the roof.
Let's give an example of calculating the roof using a calculator.
The first step is to indicate what design the calculated roof will have (gable, multi-pitched, hip, etc.). After selecting the type of construction by pressing the "next" button, we proceed to the second stage.
The second step is to specify the dimensions of the various elements of the roof, such as the length and height of the slopes.Having filled in the required fields, using the same “next” button, we proceed to the third point - the choice of roofing material.
Having chosen the material with which the roof will be covered, we press the "next" button and we get the result of the calculations:
As can be seen in the figure, with the help of a roofing calculator, not only the cost and quantity of materials used to cover the roof were quickly and accurately calculated, but also the price and number of additional elements and self-tapping screws for fasteners were calculated.
Any mistake made in the calculation of the roof can significantly increase the construction time of the house and its cost.
Therefore, the calculation of the roof should be carried out as efficiently as possible, without allowing a single miscalculation, for which it is best to use special calculator programs that perform the actions necessary for the correct calculation automatically. This will help save money on the purchase of building materials and optimize the process of building a roof.
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