It's no secret that bituminous roofs wear out over time and lose their consumer properties. In this article, we will briefly consider what roofing bitumen and other materials are, and also dwell on how bitumen roofing is repaired with their help.
Materials for bituminous roofs
The most common materials for bituminous roofs are roofing material and various types of bituminous tiles. And one and the other has its own advantages and disadvantages. Let's take a closer look at these materials:
- Ruberoid is a roofing material that can be used for waterproofing during construction work.For its manufacture, roofing cardboard is used, which is impregnated with bituminous resins, and then covered on both sides with refractory bitumen and sprinkled with asbestos or talc. Roofing bitumen is produced in accordance with the requirements of GOST 10923 - 93.
- Bituminous tiles - roofing material, differs from roofing material in that it is produced in the form of sheets of various shapes. In terms of internal structure, it is similar to roofing felt, but stone chips serve as the top layer, and the bottom layer is sometimes made self-adhesive. Allows you to make a variety of colors and textures of the roof.
- Roofing bituminous tape is an indispensable thing for roof repair. Excellent adhesion to tiles, metal, plastics, stone, bituminous roofing roofing materials. Provides reliable sealing of surfaces, in case of violation of its integrity, independently restores tightness.
The roofing tape consists of several layers: the outer layer of aluminum protects the adhesive from weathering, the inner layer is modified bitumen and the last layer is a protective polyethylene film.
Advice! Sealing tape is recommended for repair and protection of gutters, bituminous and tiled roofs. In addition, the tape has proven itself in sealing gaps around drainage and ventilation systems, as well as chimneys.
Bituminous roof repair work
If the roof covering has extensive damage and needs to be repaired for a long time, the only solution to this problem will be the complete replacement of the failed roof. This implies the replacement of a wet insulation and a cement-sand screed destroyed by water.
Such roof repairs are quite voluminous in terms of financial and time costs. In addition, it is complicated by the need to use technical means to open a thick layer of old bituminous roofing, which in itself is a laborious operation.
We must not forget about how much construction debris will need to be first lowered to the ground, and then taken out, during the restoration of the roof covering of the building. .
And it is worth remembering the creation of temporary protection of the interior from water penetration, in the case of work on the existing building.
Attention! During the repair of bituminous roofs, there are often times when bituminous roofing materials ignite. It is extremely important to comply with all requirements and safety measures when working with open fire!
New materials for the repair of bituminous roofs
To avoid the above difficulties allows the technology of repairing bituminous roofs using modern materials.
An example is the method in which a membrane of PVC or other materials is laid on the old coating, and a bituminous polymer roof is obtained.
The advantages of such membranes are obvious: coatings do not absorb water, do not lose elasticity at negative air temperatures, and do not require the use of an open flame during installation.
An example of roof repair technology using membranes
- The bituminous roof is cleaned of contaminants and membrane sheets are spread on it.
- If the Resitrix membrane is used, then no additional materials are required between it and the old roof. In the case of using cheaper membrane materials, a layer of non-woven material must first be laid on the roof.
- With the help of a building hair dryer, the edges of the panels are welded together so that a continuous roof covering is obtained. Then the canvas is fixed on the roof by means of special fasteners.
- If the area of the damaged sections of the roof is small and the roof structure has been saturated with moisture to a small extent, then the bituminous roof can be impregnated with mastic based on two components of Hyperdesmo-PB. This mastic for the roof has excellent adhesion to bitumen-based roofing materials, and after polymerization forms a high-quality roof waterproofing.
- If the waterproofing has peeled off in the roof at the junction with vertical surfaces, an aluminum rail should be used to press the membrane. And for sealing joints, it is best to use a polyurethane-based sealant "Efirmastica PU-25".
- In case of significant damage to the roof covering, when the bitumen for the roof is completely or partially absent, it must be permanently removed and replaced with a flashing-reinforced coating. This roof covering it is laid with the help of two-component mastic on polyurethane - bituminous basis "Hyperdesmo-PB". This method allows you to achieve reliable waterproofing of difficult areas. In the areas of antennas, brackets and pipes, it is advisable to use the Hyperdesmo-PB liquid mastic.
It must be remembered that there is no one way to repair a roof, and each specific case requires its own method of restoration. The use of membrane materials makes it possible to choose the most suitable and least expensive method of roof repair.
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