Spring - a time, when we have begun to repair the roof. This is particularly true of roofing work with roll surfaced materials. Well, if the customer does not frighten the use of expensive materials, work on clearing the snow that course I also affects the cost. Below, we consider the most frequently used materials for the device with a soft roof and the main points of technological processes. We list the options for repairing of soft roofs: 1. Overhaul roof - includes a complete removal of old asphalt coating, repair ties, laying a new double-layer roof membrane. 2. Current repair of the roof - is to replace defective parts of the old asphalt coating, sealing holes and cracks, and laying of new material in one or two layers. These options are called roof repair repair with full or partial autopsy. When carrying out major repairs of the roof need to pay attention to the following points. Overhaul roof involves the principle of "do no harm." Completely removing the roofing carpet can damage equipment and spoil the finish of premises, etc. Because of the improper organization of work may occur leakage. The old asphalt coating is expedient to cut down the squares whose size is determined mainly by their mass. A square to pick up and move to a place of garbage collection. Neater than cutting will occur, so may have less need to engage in repairing ties. For repair of cement-sand mortar screed is used grade not lower than 50. After 8-10 days after laying screed primed. The primer is prepared from bitumen grade I and kerosene at a ratio of 1:3 by weight. Current repair of the roof is about 80% of the total roof repairs. This roof repair is cheaper, and customers in most cases is guided by these considerations. The roof of the roll materials in the summer subject to intense heating, which leads to the formation of blisters in the roof membrane. In the pores of the wet grounds rises the water vapor pressure (heating mat to 60 ° C, the vapor pressure reaches 2 m / m).. Accordingly, at high humidity coating is peeling carpet, accompanied by the formation of air and water bags. The size of air bubbles can reach 30 cm in height and a few square meters in area. In places blistering should be cross-cut (opening "envelope"), bend the cloth to thoroughly clean the base, dry it the flame of a gas burner and apply mastic on the base, and the cloth mat. Then bent edge of carpet is replaced and pressed. For this operation, it is expedient to use ready-made cold mastic. Roofing material with polymer films antiadhesion not compatible with cold mastics, because this film does not give the material to bond to the substrate. How to deal with such cases? The film can burn the gas flame and then a piece of material put on the paste. It is clear that it is rational for small-scale works, such as the device, or adjacency formulation patches. We return to the current repair roof membrane. Places where the rolled material is completely rotted, you need to cut. The resulting hollow thoroughly cleaned, filled with mastic and seal with a piece of rolled material, so that its edges do not end up on the old roof, ie, butt. Sutures also promazyvayut mastic. In extreme cases, the repair of damage you can use the bitumen from the cut pieces of the old roof membrane. If you look closely, you can almost always be detected and nodules of bitumen, which must still be removed. The base for laying surfaced roll materials ready. We now turn to the common for these two types of repair phase - a new roof membrane device (continuous labels). 1. Before you start laying, make a fitting, material is unwound at the work site. If necessary - to carry out adjustment, using a roofing knife. Next you need to twist the material back into the roll. 2. Gradually heating the wrapper (sticky) layer deposited roll material while heating the ground or surface previously glued insulating layer, roll and roll tightly pressed to the ground. Slater particularly careful trample down the edge of the cloth to bitumen was made by a few millimeters. It should be remembered that under strong heating material can be spoiled, so it is recommended to use nozzles of varying power, depending on the ambient air temperature and material thickness. 3. Facing materials are laid overlapping. Side laps 70-100 mm, end - 100-150 mm. Initially, the material provided neposypannaya edge along the entire width of the flag of 70-100 mm, especially for the side laps. To implement the end-laps you want to remove dressing. To do this, it is heated flame gas burners and clean off the spatula. 4. After laying the basic material necessary to make the reheating formed seams and make sure they seal. Unrolling the first reel begins with a low area (valley), where the rainwater. The sharp rise in orders for repair of the roof falls on autumn. During the rainy season the ground under the roof just does not have time to dry out for a few sunny days. With the continuous label roll material moisture still remains under the roof membrane, even when applied extra dry base gas burners. All this may lead to the formation of bubbles, reducing the operational reliability of the carpet. What can you suggest in this case? Prevent the emergence of bubbles can be partially attaching the bottom layer waterproofing carpet, namely: a stripe or spot gluing, mechanical fastening (point fixation nails) laying on the ground under the roof of a perforated roll of material. These methods allow to equalize pressure vapor in the underlay layer to the pressure of external air, and thus eliminate blistering. Roofs made in ways that are said to "breathe". The technological process of the device of the roof with a perforated roll of material is as follows: Unrolling, fitting and maintenance overlap the lower perforated layer, all of the cloth, except those located in the valley, roll into rolls; adjacent coils rolled out and glued on laps, in a strong wind carried the additional fastener to the base (point), second (upper) layer was deposited material from spreading (5 mm thick) bonded completely. Cloth top layer should overlap the seams of the lower perforated layer in places adjacency to the vertical surfaces of the bottom layer of carpet and fixed point. Upper layer - a solid label.
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