Building a house is never complete without building a roof, because it is the main component of the house. Without a roof, there would be no living in the house, since the walls would not be protected and all kinds of precipitation would penetrate into the dwelling. Nowadays, various roofing materials are used in construction, but such a budget material as roofing material is well suited to cover sheds, garages and country houses. Roofing material has been used for more than a decade and in this article we will analyze the rules for choosing roofing material and the rules for laying it.
Such material as roofing material is a budget option and everyone can purchase it at specialty store or market.
Roofing material is made of special cardboard, which is impregnated with petroleum bitumen and covered with a material that slowly melts. Sell roofing material in rolls. From the appointment of roofing material, layers of asbestos or talc can be applied to it.
Advantages of this roofing material is the creation of excellent waterproofing, and it is easy to install. At the moment, roofing material is the most budgetary roofing material.
This material, in addition to its advantages, has its disadvantages:
Roofing material is used as an independent roof covering or as a layer in the layers of the roof.
The main purpose of roofing material is to protect the roof from atmospheric precipitation, and it is also used as waterproofing in warehouse and basements.
Some people use roofing material for other purposes, for example, they heat the stove, or they fertilize the garden. Some people also use it as soundproofing, but it is not at all suitable for this.
For the manufacture of roofing material, a cardboard base or fiberglass is used.
On a cardboard basis, the material is not durable and does not serve for a long time, for this reason it is laid in several layers.
Roofing material, made on the basis of fiberglass, is covered in two or one layer, because it is more durable.
Before using the roofing material, it is necessary to unfold the rolls approximately day, this is necessary so that the roofing material does not twist during operation.
Before starting work , you need to study the weather forecast, the day should not be rainy, not cloudy, and the temperature should be at least 20 degrees Celsius.
First of all the surface is lubricated with bitumen-based mastic.
There are a large number of mastics, and their choice depends on the type of roofing material.
In order to choose the right materials, we recommend that you consult with the employees of the hardware store. Today, roofing felt with a self-adhesive surface is on sale, which speeds up and facilitates the laying process.
When laying such roofing material, its sheets are laid very evenly and in parallel.It is worth paying close attention to the joints between the wall with roofing material, there should not be any gaps in these places.
We conclude that at low cost and time, you can create a reliable roof protection, roofing felt is perfect for this.
There are a lot of types of roofing material and each has its own marking:
After combinations of letters, there are numbers - this is the designation of the density of the cardboard.
For example, let's take the abbreviation RKK-420 and analyze:
Before laying roofing material, it is necessary to prepare bitumen mastic. There are two types of mastic, hot and cold.
Ingredients for making mastic
The following ingredients are required for making mastic:
To get 5 kg of mastic you need: 4 , 2 kg of bitumen, 0.
5 kg of filler (peat, sawdust, forest moss, rubber crumb, mineral wool or asbestos), 0.25 kg of plasticizer (waste oil). The mastic is boiled in thick-walled boilers with a lid, the wall thickness of which is 3 mm or more, which allows uniform heating.
Consider the stages of mastic brewing:
In the event that something went wrong, you need to close the boiler with a lid.
Do not allow the mixture to overheat, and if this happens, do not use it. A sure sign of proper mastic cooking is gray smoke and hiss from the boiler.
Always prepare the mastic before starting work, since its shelf life is one day and during use it must always be hot. Before working with bituminous mastic, the roof must be primed.
The primer can be made by yourself, for this you need to take 3 parts of gasoline and 1 part of bitumen.
We take grade 76 gasoline and bitumen heated to 700 degrees, stir thoroughly, then filter the cooled mixture through a fine sieve.
The number of layers of roofing material to be laid depends on the roof slope. If the roof slope is less, then there will be more layers of roofing material.
Stacking material in five layers
In such quantity layers of roofing material are laid on flat roofs and this is the maximum laying thickness. Such laying of roofing material in tandem with a solid base is capable of withstanding good loads.
Such installation is carried out on roofs with a slope of 2-3 degrees, this installation is suitable for unexploited roofs. Roofing material RPP -350V is suitable as a base layer. Roofing material RKM-350V or RKM-350B with fine-grained dressing is laid on top.
This laying of roofing material is carried out with a roof slope of 3 -10 degrees, in this case, roofing material RKK-350 is used for the finishing layer. For a roof with a slope of 15 degrees, laying roofing material in three layers is also suitable, but the lower layer is then lined with roofing material of the RKK-500A, S-RM or RKK-400A brand .
.. The final layer will then be roofing material of the RK-500 -2 brand.
Laying roofing material in two layers
Such laying will be used when the roof slope is 10 -15 degrees, if the roof slope is greater, it is recommended to use other roofing materials
Tools for installation
Before you start laying the material, you need to decide in what way you will be laying roofing material and what tool you will use depends on it. Roofing material is laid in three different ways:
Roofing material is fixed with the help of rails and nails or screws. A roll of roofing material is rolled out and overlapped. The slats are placed, along the edges of the roofing material, this gives a tight pressing of the material to the base.
For such installation, you will need a hammer or screwdriver, as well as fungi made of metal or plastic.
Roofing material sheets smear with mastic over the entire area or at the joints.
To melt the mastic, you need a metal container and a long brush to apply the mastic to the roofing material. For work, you will also need a roller and a hand roller.
For work, we need a gas burner, a hand roller. The lower layer of roofing material is melted with a gas burner, (while it is wound into a roll) it is slowly unwound and heated and the roofing material is glued to the base of the roof. In order to avoid the formation of condensation, it is necessary to walk on the roof with a hand roller between the base and the layer of roofing material.
This method is only suitable for flat roofs.
Roofing material is always sold in rolls of a certain length, if necessary, it is shortened. Sometimes it becomes necessary to cut the material across the sheets and such a cut can be made with a household knife or a boot knife.
A longitudinal cut can be made without even unwinding the roll with a hand saw on wood.
The roof must be clean before starting work, not have any dents or large drops
Flat roofs are mostly garage cooperatives, and laying roofing material for such roofs is a good option.
But the joints between the slabs and the walls are weak.
Stages of work:
If you make a primer yourself, be sure to pour heated bitumen into the gasoline, if you do the opposite, it can lead to ignition of the mixture.
4. Coat the entire roof surface with mastic.
5. Let's start laying roofing material.
We start laying from the bottom up. When laying the material with a gas burner, the rolls must be overlapped.
6. Slowly spinning a roll of roofing material, it is heated with a gas burner and pressed with a hand roller.
When laying roofing material on mastic, you must first apply a thin layer of mastic to the entire roof surface. Then lay a layer of roofing material and so we lay the number of layers we need.
8. We put the final layer. For the final layer, use a ruberoid with a coarse dusting.
The laying principle is the same as for the previous layers. The service life of a roofed roofing material can be approximately 10 years.
Roofing with roofing felt is a rather profitable and cost-effective option. Despite the existence of modern roofing materials, it remains in demand.
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