If you plan to build a country house, then you are already faced with the fact that experts recommend preparing a cost estimate. Why do we need this we will describe in this article, which will show how the budget for roofing is compiled and what you need to know for this.
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Why is it necessary
The first thing that comes to mind when it comes to the start of construction is its cost. This parameter depends on many factors, therefore, the best option for determining the cost is to draw up an estimate. It can be prepared only on the basis of a finished project and is used not only when it is required to build a roof, but also during reconstruction or repair.
Estimates can be made without a project, but such an approach is usually not practiced. This is due to a very large supply of materials for roofing, which will need to be laid in the calculations. Otherwise, the amounts that will be given in the documentation will be too far from the real ones and will not be able to show the true state of affairs.
Based on the estimate, it is already possible to procure materials, and the total cost of the work will immediately become apparent. It is important not to make mistakes at this stage, since they will lead to problems already during construction, and you will need to buy additional materials, or, conversely, think about what to do with extra boards, insulation or roofing. When the installation of the roof will be carried out by a third-party contractor, it is on the basis of the analysis of the estimate that you can choose the most bona fide.
An estimate is needed, but it must be drawn up correctly. It is not easy to choose a reliable specialist and no one will give ready advice in this case. For example, you can contact several companies at once, and after estimates are prepared to choose the most complete option that has a suitable budget.
I must say that not a single method will protect you from poor-quality work, so it is better to choose a contractor based on a combination of factors. Sometimes they promise to perform the installation of the roof at a reduced price, but in the process of work it turns out that additional materials were required, and therefore the estimate is changing. On average, the initial figure can be increased from 10 to 30 percent.
The estimate can be made by a specialist, however, for its verification, the services of a specialist will be required. You can always find a way out of this vicious circle, but you should not believe those who say that all factors cannot be taken into account immediately. A true professional will easily evaluate future roofing works, their volume and calculate the cost of materials that are needed for the project.
The person who will make the estimate should receive complete information about what is planned to be built. He can also go to the site to study the construction being built and the nature of the relief. Based on the information received at the construction site, the document is amended, after which it becomes part of the concluded construction contract.
What determines the estimated cost
The cost of work is determined by several factors. It consists of the cost of installation and materials, and in most cases depends on the area of the roof. Roofing is the first factor to consider. It can be of several types:
- Metal tile. The cost of this material depends on the manufacturer and technical specifications. The main indicator is the thickness of the coating and its type. In the general case, with the thickness, the protection of the material from the environment also grows, however, it should be borne in mind that each roof covering has its own characteristics.If we talk about polyester 25 microns thick, then its square meter will cost from 187 to 208 rubles. A metal tile protected by a 35 mm micron Printech coating will cost 288 rubles per 1 m2. There are more expensive options, for example, plastoisol 200 microns thick or Prisma 50 mm. The price of a “square” is within 400 rubles, and roofing works will also require money.
- Bituminous tile. In this case, cost can play a decisive role, because good material will not be cheap, but at a high price, quality may not be the best. The price depends on the operational characteristics of the material, as well as the company producing it. For example, if the installation of the roof is carried out with “Classic” bituminous tiles containing 3.5 m2 in a package, it will cost 265 rubles, and “Alaska”, in a package of which only 2.57 m2, costs 463 rubles.
The cost depends on the geography of production even more than on the characteristics of a particular tile. Metal from Finnish plants costs at least 344 rubles. for a coating of 50 microns, and 260 rubles. for 25 microns of polyester. Sweden is also known on the market for such materials, but installing a roof using products from this country will be expensive. The price of the material starts from 280 rubles per m2 and can reach 371 rubles. A composite metal tile from Sweden will cost up to 680 rubles per 1 m2.
- Copper tile. This solution is not cheap, but the reliability of such a material is very high. Roofing should be entrusted to specialists, since it is desirable to avoid damage to the material. Due to the properties of copper, after a few years, the roof surface is covered with a coating, and then completely changes color. The layer arising at the border of copper and air is a reliable protection of the metal, which can last a long time. Similar elements are produced in Italy, and the cost of 1 m2 starts from 1475 rubles.
- Roof installation can also be performed using corrugated board, the cost of which is not the highest. The price of galvanized steel starts at 148 rubles per m2, and the material having a polyester film on the surface will cost 182 rubles. Of course, one must also take into account the thickness of the steel sheet, which varies from 0.4 mm to 1 mm, as well as the type of protection: polyester is applied on one or both sides. Decking is ideal to do roofing work with your own hands, because it is not as capricious as a number of other materials, and it is very easy to install.
To use each type of coating, appropriate accessories and additional elements will be required. In this case, we are talking about skates, plugs, cornice strips, valleys and junctions. Do not forget about roofing screws, paint or snow retainers, which are also selected for a certain type of coating.
Roofing can also be carried out using technologies other than those described above. For example, the creation of rebate roofs is carried out using ready-made paintings or sheet material, which is already in place passed through a folding machine. For a number of buildings, rolled surfaced materials are used, and Ondulin or the real slate can be laid somewhere.
The cost of some materials may seem too high, and the installation of the roof will not be the cheapest, but this often pays off because the service life of such a roof is much longer than in the case of a cheap coating.
How to make an estimate
The estimate itself is a list that contains the serial number, name of the resource, unit of measure, quantity, various ratios and the total amount in cash. If you do this work yourself, you will need to analyze the available offers on the building materials market and choose the option that will be ideally suited for the project.Of course, one cannot do without knowledge (or availability at hand, but in this case the time will be much more) of various estimated standards: GOS, TSN, OCH.
In the case when it is planned to do roofing work with your own hands, an estimate is also useful. If we are talking about a simple design, then this can be an approximate sketch, which will avoid errors when ordering materials. For independent calculations, you can use special software, for example, an estimate calculator. Similar applications are released by various manufacturers, but they are also found in the form of online systems. In this case, for calculations you only need to go to the site and set the parameters according to the project documentation.
If the installation of the roof will be carried out by the contractor, then the preparation of estimates must be entrusted to a specialist. Of course, you will have to pay for this work, but the result will be worth it.
If you plan to complete the preparation of estimates yourself, you will need to carefully understand the issue. For example, you will need to understand how this or that operation is performed, what type of insulation is needed for one of the suitable roof options, and also what roofing technology is the best in this case.
Factors Affecting Estimated Costs
There are not so few of them as it seems at first glance, but not many. The first point is the availability of project documentation. It is on the basis of it that you can calculate how much wood is needed for roof trusses, Mauerlat timber, as well as insulation and roofing material. Roofing will also be easier to perform, because the project will avoid accidental errors. The type of roof plays an equally important role. For example, if you plan to create a cold attic, then the amount of insulation, as well as vapor barrier membranes, will be much less than when building an attic.
Insulation is also of several types, the cost of which can vary significantly. The price of a sheet of expanded polystyrene in terms of cubic meters starts at 1120 rubles, and the maximum price is 2640 rubles for PSB-S 35. The cost of mineral wool boards is 1500 rubles per cubic meter, but there are more expensive options. Typically, the installation of the roof can not do without this reliable and durable material.
The installation cost cannot be lowered even in a situation when roofing is done with your own hands, as fasteners and other consumables are required. For example, in the case of guided sheets, you need fuel for the burner, and bitumen mastic is also needed. It is also worth considering the cost of electricity, since most of the work will be carried out using a power tool.
The technology of roofing involves in each case the use of certain materials and technological solutions, the cost of which will vary. Obviously, the specialist will be able to make the most complete assessment of all expenses, however, one can cope with one's own hands no worse. The only difference is how much time you need for this and whether it is worth doing what you can order from a professional for not that much money. Considering how much the materials and roofing work cost, the payment for the services of a specialist will not seem so great, and there will be much less various difficulties during construction or repair.
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