Рубероид РКП 350: specifications. Marks of roofing material: prices, GOST

Modern manufacturers produce several brands of ruberoid. All of them have good operational properties and more than acceptable cost. Ruberoid RCP 350, whose technical characteristics will be discussed in this article, is currently one of the most popular and popular varieties.

general description

A roofing felt of any kind is made on the basis of a dense cardboard, well impregnated with fusible bitumen and covered with refractory. This technology allows you to get absolutely moisture-proof material, very easy to install. Lime, clay, chalk and other minerals can be added to the outer bituminous layer to improve performance . Due to these fillers, the heat resistance of the material is greatly improved.

There are only two main types of roofing felt:

• Lining. This type can be used as a waterproofing or lower lining layer in the roofing. A cardboard with a density of 300 g / m ^{2 is} commonly used for the manufacture of this brand name.
• Roofing. This kind of roofing felt is used in the roofing carpet as the main top layer. It is made on the basis of cardboard with a density of 350-400 g / m ² . From the outside, the roofing marks of the roofing felt are covered with mica or quartz sand.

Marking

In addition to the two main varieties, there are many modifications of this material, intended for use in a variety of purposes. To find out the brand of ruberoid, you can study the label on the roll. The marking usually consists of letters and three digits. Knowing what these symbols mean, it is not difficult to determine the specific purpose of the waterproofing. The first letter represents information about the type of material ("P" - ruberoid, "P" - pergamina). The second - about his appointment ("P" - lining, "K" - roofing). The third letter indicates the type of sprinkling ("M" - fine-grained, "K" - coarse-grained, "Ч" - scaly, "П" - pulverous). The figures show the cardboard brand of what density was used for manufacturing.

Ruberoid RCP 350

This type of waterproofing, as can be judged by the marking, is designed to cover roofs and has a dusty powder (quartz crumb or talc). For the manufacture of such material as ruberoid RCP 350 (technical characteristics will be considered below), high-density cardboard in 350 g / m ^{2 is used} . Sprinkle in this case is applied from both sides. Use ruberoid RCP 350 can be used for the installation of both upper and lower layers of roofing.

Specifications

Next, we present to your attention a table from which you can learn more about the properties of the roofing felt of the RCP 350. So, the roofing material of the RCP 350 has the following technical characteristics:

Modifications

At the moment, in addition to the main variety of ruberoid RCP 350 is produced its lightweight modification. It is labeled as follows: RCP 350-O. Breaking load of this material is slightly less than that of RCP 350 (26 kgf). Additional striping of the bands in this case is also provided, but it is only a small talc without crumbs. This modification can only be used in the lower layers of the coating. For the upper ruberoid RCP 350. GOST, as can be seen from the table, provides for its breaking ability of at least 28 kgf, as well as a more reliable sprinkling.

Mounting rules

Before the beginning of the roofing work, the rolls must be unrolled and held in this position for about 24 hours. If there is no possibility to decompose the material in this way, you can do a little differently. In this case, rolls are also rolled out, but not spread over the ground or the floor, but roll backwards. This operation will eliminate all the waves and wrinkles on the bands. Mount the prepared in this way waterproofing will be much easier.

Of course, when buying such material as ruberoid RCP 350, the GOST certificate of conformity should be asked from the seller. The risk of acquiring a counterfeit in this case is practically nonexistent. However, it will not hurt to be reinsured.

Cover the roof with material of the grade RKP 350 is possible only at t ambient air at least 0 degrees. Sometimes the work is done at subzero temperatures. However, in this case, rolls should be kept at t not lower than + 15 degrees for at least 24 hours.

To stick this kind of roofing felt can be on a wooden and concrete surface. The cladding in the first case should be solid. To fix the strips, it is allowed to use a mastic of both hot application and cold.

Installation method

At least two people must work. The order of installation of the sheets in this case will be as follows:

• One person smears the surface of the roof with bitumen. Its hot variety is best applied with a long stick with a rag wound around it. For cold mastic gluing, a roller is usually used.
• The second person rolls the roll and carefully spreads it from the center to the edges.

The overlap between the strips in the longitudinal direction should be 15 cm, in the transverse direction - not less than 10 cm. When using ruberoid RCP 350 as the lowest layer, it is additionally nailed to the crate by roofing nails (with a fixing fungus made of plastic or sheet metal) in 20 cm steps Of course, all overlaps must be carefully smeared with mastic.

If the roofing paper RCP 350 is used to make the final layer, the joints should be covered with bitumen not only from the inside, but also from the outside. Also in this case it is desirable to stack the material with an overlap of up to 1/3 of the width of the strip. While the mastic on the seams from above is not frozen, it is sprinkled with coarse-grained sand. The break between the laying of layers should be at least 12 hours.

Рубероид РКП 350: price

It is worth this cover literally a penny. Ruberoid is generally the cheapest roofing material at the moment. For one roll length of 15 m and a width of a meter, you will have to pay only about 300 rubles. To cover the roof area of 50 m2 they will need only 8 pieces (two layers), taking into account overlaps and a small margin. Therefore, the material will cost only 2,400 rubles.

Soft roofing materials, including the roofing paper RCP 350 (technical characteristics of which were considered in this article), as you can see, are inexpensive, have excellent performance and fit the simplest technology. Their use as a budgetary version of roofing can be considered more than appropriate.