The choice between EKP and TKP brands when purchasing rolled material often becomes the decisive factor in determining how long the garage roof will protect the car from precipitation. If you put the wrong type, for example, the bottom layer without topping in the open sun, the bitumen coating will flow on the first hot day, completely losing its waterproofing properties. That is why the question of which bikrost is best for a garage roof requires a detailed analysis of the technical characteristics, and not just buying the cheapest roll in a hardware store. Correctly selected material can last up to 15 years without major repairs, while saving on the top layer will result in the need to re-roof in a couple of seasons.
The main problem with garage roofs is flat or low-slope construction, where water stagnates and the surface reaches extreme temperatures in the summer. Bikrost is a weldable material consisting of fiberglass or polyester impregnated with bitumen binder. Unlike roofing felt, it does not rot and has significantly higher heat resistance. However, there is no universal solution “for everyone”: different climatic zones and types of foundation (concrete, wood, old roofing felt) require different modifications of the canvas.
In this article we will take a detailed look at the markings of rolls, compare the bases and types of topping so that you can determine exactly what is suitable for your case. We will look at installation technology, common mistakes made by beginners, and the nuances of working with a burner that directly affect the tightness of the seams. Understanding these aspects will help you avoid leaks and keep your garage dry for years to come.
Analysis of markings: what do the letters on the roll mean?
To understand which bikrost is best for a garage roof, you need to learn to “read” the factory markings that are applied to the label of each roll. The abbreviation consists of three or four letters, each of which carries critical information about the composition and purpose of the material. The first letter is always "B", which means Bikrost, the second indicates the type of base, and the third and fourth indicate the type of protective layer. An error in decoding can lead to the purchase of a material that is not physically intended for use as a finishing coating.
The second character in the code tells us what the base of the canvas is made of. It can be fiberglass (X), fiberglass (T) or polyester (E). Fiberglass - the cheapest option, it breaks easily when stretched and is only suitable for lower layers or temporary solutions. Fiberglass has high tensile strength and dimensional stability, making it ideal for flat roofs where movement of the base is possible. Polyester is considered an elite base that can stretch without breaking, which is important for roofs with complex geometry or vibration loads.
⚠️ Attention: Never use material with a fiberglass base (X) as the only layer on a roof in use, as it may crack due to temperature changes.
The last letters indicate the type of topping. For a garage, the letter “K” (coarse grain) or “P” (film) is critical. If you see the EKP or TKP marking, this means that the material has a protective coating on top and a film on the bottom. Such rolls are created specifically for the top layer. Marking with the letter “P” on both sides (for example, KhPP) is intended exclusively for lining work or waterproofing foundations, but not for finishing roofing.
Comparison of bases: fiberglass, fiberglass or polyester
The choice of base directly affects the durability and mechanical strength of the roofing carpet. Fiberglass (marking X) is a non-woven fabric that is easily deformed. Its main advantage is its low price, but its tensile strength is minimal. Garages with wooden sheathing, where movement of the boards is possible, or concrete slabs with cracks require a more elastic material, so fiberglass here acts as a budget but risky option.
Fiberglass (marked T) is a woven material with high strength. It does not stretch, but holds the tensile load very well. For a flat garage roof, poured concrete or covered with slabs, fiberglass is the gold standard. It can withstand walking on the roof when clearing snow and does not tear due to the thermal expansion of bitumen. The cost of such material is higher, but the safety margin fully justifies the investment. Polyester (marking E) is the most technologically advanced basis. It is capable of stretching up to 30-50% without damaging the structure. If your garage is located on moving ground or the roof structure experiences constant vibrations (for example, there is a railway track nearby or there is a generator), then choosing polyester will be the only right decision. It forgives minor errors during installation and compensates for the movement of seams between the slabs.Top or bottom: select the type of sprinkle
The question of which bikrost is best for a garage roof cannot be resolved without understanding the difference between the protective layers. The coating protects the bitumen binder from the destructive effects of ultraviolet radiation. The sun's rays cause ordinary bitumen to oxidize, become brittle and crack. Therefore, protection is required for the final layer that will look at the sky. Coarse-grained topping (granulate) from slate or basalt creates a reliable shield, reflects some of the heat and mechanically strengthens the surface.
For the lower layers or internal waterproofing, polyethylene film is used. It prevents rolls from sticking together during storage and serves as an indicator when heated: when the film burns, the master understands that the temperature has reached the required temperature for gluing. It is strictly forbidden to use material with a film top layer (index P) in the open sun - it will become unusable in one season.
For a single-layer garage roof, use only material with index K (granulate) or M (fine-grained coating).
There is also a fine-grained coating (M), which is sand. It is cheaper than granulate, but less durable. The sandy coating is quickly washed away by rain and blown away by the wind, exposing the bitumen to the sun. For a garage where maximum service life without maintenance is important, it is better to overpay for granulate (K). It not only protects, but also gives the roof an aesthetic appearance, hiding minor unevenness in the installation.
Installation technology: step-by-step installation instructions
The quality of the roof depends not only on the material, but also on compliance with the installation technology. Before starting work, you must carefully prepare the base: remove debris, dust and remnants of the old coating. If there are swellings or cracks in the concrete, they must be sealed with a repair mixture. The moisture content of the base should be minimal; the presence of water under the bitumen layer when heated will lead to boiling and peeling of the material.
☑️ Check before starting work
The fusing process begins with rolling out the roll for fitting and cutting. Then the material is wound back, leaving a small reserve. Using a gas burner, simultaneously heat the surface of the base and the bottom of the roll until a glossy shine of the bitumen appears. It is important not to overheat the material, otherwise the base will collapse. The movement of the burner should be uniform, in the shape of the letter “L”, in order to heat both the roll and the base.
After warming up, the roll is rolled out, pressing it with a special hook or roller to squeeze out the air from under the web. The overlap of adjacent strips should be at least 10-15 cm. Particular attention is paid to the junctions with walls and ventilation pipes - there the material is rolled onto a vertical surface and additionally fixed. For reliability, two layers are often used: the first (lining) with film, the second (finishing) with granulate.
⚠️ Attention: Fusing work can only be carried out at air temperatures above +5°C. In frost, bitumen becomes brittle and does not provide adhesion.
Comparative table of material characteristics
To simplify the choice, we present a comparison of the main parameters of popular modifications. The data will help you compare cost and life expectancy to make an informed decision.
| Brand | Base | Top layer | Weight 1 sq.m | Service life |
|---|---|---|---|---|
| Bikrost HPP | Fiberglass | Film | 3.0 kg | 5-7 years |
| Bikrost TCH | Fiberglass | Granulate | 4.5 kg | 10-12 years |
| Bikrost EKP | Polyester | Granulate | 5.0 kg | 12-15 years |
| Bikrost HKP | Fiberglass | Granulate | 4.0 kg | 7-9 years |
As can be seen from the table, the difference in weight between cheap fiberglass and high-quality fiberglass or polyester is significant. Heavier rolls contain more bitumen binder, which directly affects elasticity and frost resistance. The best option for a permanent garage is a combination: a bottom layer of HPP or TPP and a top layer of TKP. This allows you to save on the hidden layer, but get reliable protection on top.
Common mistakes during selection and installation
One of the most common mistakes is trying to save money by buying material that has expired or was improperly stored. Bikrost must be stored strictly in an upright position in closed areas. If the rolls were lying outside in the sun, the bitumen could lose its properties even before work began. Always check the production date on the label; for bituminous materials this is a critical parameter.
The secret to quality control
Inspect the cut of the roll. The bitumen layer should be homogeneous, without light spots (underpropyl) or black clots. The base must be completely hidden by bitumen. If the warp threads are visible, the material is defective.
Another mistake is ignoring priming. A primer (bitumen mastic diluted with a solvent) is necessary to bind dust and improve adhesion. Without pr