Why to understand the brands of roofing paper?
To prevent moisture from leaking to the rafters or crate, the roofing board is impregnated with soft oil bitumen, but to make the cardboard more durable, it is additionally covered with refractory bitumen.
Reliable waterproofing allows for a long time to keep the wooden structures of the house from rotting and leaking. Also, roofing material is used to insulate the basement and foundation. Since the scope of its application is multifaceted, it has several varieties.
Given that there are many different types of this insulating material, how to determine which one should be used in a particular job? The brands of roofing felt serve as a help: they identify its direct purpose.
We decrypt the marking: what is
The name on the packaging of the roofing waterproofing consists of three abbreviations and the following figures. The first letter "R" indicates the name of the product - roofing material. The subsequent letters are "K", "P", "M" or "H".These abbreviations mean the size of the powder: "K" - coarse-grained, "P" - pulverized, "M" and "Ч" - respectively, fine-grained and scaly.
The third letter of abbreviation indicates the scope of application, you can find a lining felt roofing and roofing. The corresponding letters are "P" and "K".And the numbers used at the end determine the density of the roll. So, for example, the abbreviation RKK-350 indicates that it is roofing ruberoid for upper layers with coarse-grained deposition, having a density of 350 g / m2.
Types of ruberoid and their differences
The opposite of the RKK is the ruberoid underlay .It can be used for any layers. It is used both in the upper and lower layers of the roof. Also applicable to protect the foundation from the harmful effects of moisture from rain and snow melt after winter.
With the growth of technologies used in construction, the ruberoid appeared recently. Its dignity lies in the fact that when using it, time is saved considerably, and the process of work is simplified. The sticky properties of the self-adhesive roofing material are activated by heating the sun's rays.
A roofing ruberoid, or Euroruberoid, differs from its counterparts in that it is based on modified bitumen. This modification is applied to one or two sides. Due to this, its properties in many respects exceed the ones traditionally claimed at the dawn of the appearance of this material.
This version has an elegant appearance. In addition, it is more durable, flexible and durable. This makes it attractive. Of course, its price is higher than that of an ordinary roofing material, so not all of it is used, besides, only in roofing works.
A weldable roofing felt is also used for the upper and lower layers of the roof. Marking of RM, for example, ruberoid PM-350, indicates that this type is used for the lower layers. RK grade is used for upper roofing layers. The advantage of this kind of material in the fastness of joining a strong seam.
A roofing material with crumbs is also available. What purpose does it serve? The baby gives him a beautiful view. But its more important function is to protect the coating from the aggression of sunlight, high temperature fluctuations and rain. The lining materials are finely powdered, whereas for the upper layers a large crumb is used as a powder.
When choosing a roofing material, it is necessary to pay attention not only to its brand, but also to quality. How to determine the level? It should, of course, correctly be able to decipher the marking, and then find the relevant characteristics in the regulatory documents. So, to determine the indicators that should correspond, for example, ruberoid RCP-350, GOST 10923-93 will help in a few minutes.
If GOST is at the end of the marking, then most likely, this product has actually passed quality control and corresponds to the state valuation for roofing materials. Also, when buying, you should carefully inspect it for wrinkles or tears. The presence of any of the listed defects can lead to the fact that the roofing material will quickly become unsuitable.
