Roofing glassine brand p 30 characteristics. What is glassine? Key specifications, a manufacturer you can trust

One of the most effective types of roofing materials is glassine. It is a cardboard sheet formed into a roll and impregnated with bitumen. Characteristics of glassine brand P300, as the most common brand of this material, allow it to be used almost everywhere.

Glassine refers to soft roofing materials and has high performance. GOSTs provide for the production of various grades of glassine, and they differ from each other, first of all, in the type of cardboard used, its thickness and bitumen properties. Today, such types are popular as:

• Roofing glassine brand P250;
• Roofing glassine brand P300;
• Glassine roofing brand P350.

Grade P300 can be used not only to form the bottom layer of roofing, but also as a packaging material for complex industrial or manufacturing equipment and units. Glassine P300 is effective for waterproofing during transportation or storage of various elements, parts, spare parts, as well as the arrangement and laying of heating mains.

Advantages and disadvantages of glassine

The main advantages of glassine of various brands should be highlighted ease of installation and minimal dependence on ambient temperature. This material, due to the simple technological process of its manufacture, inexpensive and accessible. Due to the use of tar in the production of glassine, it is possible to use it for insulation of residential premises, waterproofing of baths, etc. Unlike roofing material or roofing felts, glassine, when heated, emits a minimum amount of substances harmful to the human body.

There are also disadvantages of glassine, compared with other similar roofing materials. Glassine has high level of flammability. This greatly affects the level of fire safety of the premises where it is laid. Fresh glassine has quite strong unpleasant odor, which excludes its use in open form when isolating residential premises. In addition, the structure of glassine has low strength, it is easily torn and during installation work, special attention should be paid to the integrity of the finished coating.

Roofing glassine grade P 350 technical characteristics

Glassine brand P300 refers to fourth flammability group similar materials and 83 flammability class (GOST 30244 and 30402). According to manufacturing standards P300 warp weight should be approximately 300 g per 1 square meter.

Glassine, made in accordance with the requirements of the standards and in compliance with the prescribed technology, must have tensile load value 27 kg/s. The level of water resistance of the P300 brand at a pressure of 0.01 atm is 10 minutes, while water absorption should not exceed 20%.

Roll dimensions finished products depend on the production lines used by different manufacturers, however, the most common width of a roll of Glassine P300 is 100 cm, and the total area of ​​the material in a roll is 20 square meters. m.

Laying glassine, like any other waterproofing material, should provide for an overlap of about 10-15 cm, and a construction stapler is used to connect the sheets in the overlap area. After the formation of a continuous surface, all joint lines are processed with mastic or connected with special adhesive tape.

Glassine P-300 successfully used in construction as a roofing material for hydro and vapor barrier, protecting the surface from condensation. Like roofing material, glassine has a cardboard base impregnated with low-melting oil bitumen, however, it does not contain bituminous covering layers, which ensures a low specific gravity, non-toxicity and good elasticity of the material during laying.

Unlike modern fiberglass and polymer roofing materials, the price of glassine is low, so it is preferred to use it in the construction of large volumes.

The use of glassine

• In order to isolate the surface from condensate and evaporation, glassine is used between a reinforced concrete base (wall or floor) and wood-shaving material. The cost of glassine optimally corresponds to the final quality of the work carried out, the level of safe protection of the structure. This allows the material to be used in the construction of heating mains, even in their most difficult sections.
• Bituminous impregnation of glassine is a kind of ventilation for a heat insulator. Its special structure prevents the accumulation of moisture vapor inside the insulator. As a result, all extraneous moisture is removed to the outside, thereby extending the life of the insulating material.
• One of the main features of glassine, as mentioned above, is the low level of carcinogenicity in comparison with other materials of this type used before. During production, no harmful emissions occur, the presence of running water and waste disposal are not required. Natural bituminous fumes are removed from production by a forced ventilation system. All this makes the material even more environmentally friendly.

This information is taken from the website of the RDS Stroy company https: // site
From the page https://website/catalog/pergamin/pergamin_p_250_15_kv_m/

Various areas of construction require the use of modern and high-quality thermal insulation materials. Properly selected and laid material may lose its purpose and quality without the use of protective equipment. This role is assigned to the universal material - glassine.

What is parchment

The product successfully replaces the almost unused traditional means of protection from roofing felts, roofing material. The high degree of carcinogenicity of previously used protective agents allowed glassine to take the main positions in the roofing materials market. The protective material makes a worthy competition.

Glassine is a roll material with a low degree of carcinogenicity. The “coverless” material is obtained by impregnating roofing paper with special grades of petroleum bitumen of a certain consistency. The rolled insulator is manufactured in full compliance with TU 5774-001-503806122701-2009.

Main purpose

Among modern protective materials, this product is most popular due to the reliable protection that it can provide to thermal insulation materials. Each brand of glassine has certain characteristics that allow it to exclude the penetration of moisture into the composition of the insulation.

Along with its main purpose of resisting moisture, the product does not interfere with the effective ventilation of the insulation system. On the contrary, it actively participates in its formation and contributes to the effective removal of steam condensate without its accumulation. Cheapness and versatility significantly distinguish it in the market of competitive roofing materials.

Applications

Glassine, which meets GOST 2697-83, in combination with heaters, is a reliable protection system. The resulting condensate as a result of evaporation from wood materials is deprived of the opportunity to harm and disrupt such waterproofing. Practical applications are everywhere. It also performs well as a packaging component in heavy industries.

• The lower layers of the roofing carpet (protects the insulation "from below").
• Household temporary buildings, utility blocks and summer cottages. The insulation material is laid with 2-sided glassine insulation. It is used in the arrangement of pitched roofs. Participates in outdoor work with facade cladding. Effectively participates in protection from cold and wind.
• Winter baths with a wagon-type structure, which is made of foil and mineral wool. The microporous structure of the cardboard well removes intense evaporation from the log house.
• complex reinforced concrete structures. Reliably isolates wood materials of the building (floors, walls) from concrete bases in the event of condensation.
• Heating mains. At the same time, pipes are much less susceptible to rust formation processes.

Specifications

The basis of glassine is a special multilayer cardboard containing wood fibers, straw, cotton and cellulose. A quality product contains non-woven materials that best ensure the ability of glassine to absorb moisture. Improved technical characteristics are obtained by using special presses in production processes that allow creating a pressure of 300 g/m2.

Among the existing types of glassine differing in the type of cardboard used, thickness, weight, size and type of oil bitumen impregnation, three main ones stand out. This group does not contain carcinogenic compounds, is environmentally friendly and will not be affected by temperature fluctuations. With minimal production costs, the consumer receives a high-quality and cheap insulator.

The technical characteristics of a quality product must comply with specially developed standards and specifications. Great attention is paid to high rates of water resistance, water absorption capacity, vapor barrier properties, elasticity and breaking loads. The surface of the parchment is matte. The plane eliminates bumps, folds, grease stains.

The density of the rolled roll must comply with the conditions of production and have even ends. Rolls can have parameters with a web width of 1000, 1025 and 1050 mm. Technological parameters do not allow deviations in width, which should not exceed - ± 5 mm.

The main brands of roofing glassine are presented:

• P 250.
• P 300.
• P 350.

A variety of insulator P-250 is characterized by:

• the maximum withstand force load of tension - N (kgf) 216 (22);
• fineness with high strength;
• surface elasticity;
• the ability to work as a starting material for a long time (at p=0.001 MPa);
• low price;
• the ability to effectively protect without the appearance of signs of water on the surface up to 10 hours.

A variety of insulator P-300 is characterized by:

• the maximum withstand force load of tension - 25 kgf;
• increased flexibility and strength;
• relative subtlety;
• daily moisture absorption not > 20%;
• long service life;
• cheapness;
• the ability to effectively protect without the appearance of signs of water on the surface up to 22 hours.

A variety of insulator P-350 is characterized by:

• high breaking capacity of the canvas - 27 kgf;
• increased density and special strength;
• higher price, but acceptable to the buyer with good performance;
• daily water absorption not > 20%;
• the ability to effectively protect without the appearance of signs of water on the surface up to 22 hours;
• high protective ability to maintain the integrity of the thermal insulation of the roof.

Design features are characterized by its verbosity. For example, a 5-layer glassine is made up of:

• the bottom layer of powder made with talc or chalk;
• 1st layer of cover consisting of refractory bitumen with the addition of plasticizers;
• the main layer of thick cardboard impregnated with low-melting bitumen;
• 2nd cover layer;
• the outer layer, which is a coarse-grained dressing of sand or mica.

The areas of rolls of produced grades are 20 m² and 40 m². The mass of a square meter of products corresponds to 0.55, 0.6, 0.75 kg. The width of the sheets laid in a roll is 1000, 1025 and 1050 mm. Reference data of rolls have mass - 15 or 30 kg. Flexibility without cracking is R = 5 mm at 18 ° C. By combustibility, it belongs to the G4 group (GOST 30244). According to flammability to group 83 (GOST 30402).

Features of the vapor permeability of glassine

All building materials, one way or another, are characterized by vapor permeability. Vapor permeability is a characteristic with which the ability to pass steam is evaluated. It has a numerical expression called the vapor permeability coefficient. It is defined as the density of vapor capable of passing through a material with a thickness of 1m in a certain period of time.

Vapor permeability can be characterized by the reciprocal of a material's resistance to vapor flow. Simplified calculations come down to dividing the unit by the value of the vapor permeability resistance. The result is multiplied by 24 hours and the result is a number in grams per m² per day. For example, you can calculate the vapor permeability for glassine with a thickness of 0.4 mm with a vapor permeability of 0.33.

In practice, it is believed that the denser the base of the roofing paper, the better the ability of the future glassine material to absorb bitumen impregnation. After impregnation, glassine becomes plastic and acquires increased water-repellent properties. If the material is used in the lower layers of equipped roofs, then the requirements for increased strength can be reduced.

Among the interesting properties of glassine, one can note its heat resistance and low susceptibility to temperature changes. The melting point of the material is quite high, although it is combustible. This quality allows the material to serve without problems for at least 10–15 in summer heat. High elasticity values ​​are very good in winter cold conditions and help the material not to crack.

The lightness of glassine allows workers to quickly lay it in any hard-to-reach places. Almost none of the competitors of this universal protective agent can resist its low price. Some companies producing roofing glassine spare no expense to improve it and improve its properties in every possible way. Numerous customer and customer reviews confirm the high performance - companies benefit from high quality.

Glassine is not used as a separate element. With a detailed acquaintance with the characteristics, it can be concluded that there is no better application than a protective substrate for hydro and vapor barrier. Effectively used in composition with a metal profile, tiles, slate.

Having decided on the brand of glassine, the buyer should choose a well-known manufacturer that will offer the most advantageous offers. By purchasing this amazing material, the user is guaranteed to save money and get high-quality vapor barrier with good ventilation of the thermal insulation system.

Glassine P-250 is a soft rolled roofing covering, which is cardboard grade 250 impregnated with oil bitumen, produced from wood, cellulose and semi-cellulose, rag mass, natural flax and cotton. In terms of composition, cardboard 250 is similar to cardboard grades 300 or 350, but there are differences in such parameters as density, strength and, accordingly, quality: the higher the grade, the more reliable and durable the cardboard. Despite the fact that glassine P-250 is the most economical material in the product line for vapor and waterproofing, its quality is not in doubt. Oil bitumen is used to impregnate cardboard, which has such qualities as viscosity, plasticity, thermal and water resistance. The combination of these properties of bitumen allows the use of glassine for hydro- and vapor barrier purposes.

The popularity of glassine P-250 is due to the fact that it is the lightest, most inexpensive and easy-to-use vapor barrier and moisture barrier material, as well as the fact that it is easy to transport, store and use.

Areas of use
Glassine P-250 is used in several areas, including for vapor barrier, waterproofing and as a wrapping material for various products.

When used for vapor barrier, glassine P-250 is placed in places where metal, concrete or brick bases come into contact with wooden structures. They are upholstered with wooden parts of windows, doors, beams, logs, that is, those structures that will subsequently be hidden in brickwork or concreted. In many cases, glassine P-250 is laid at the junction of a concrete foundation to the walls of a wooden structure, for example, a log house, a log house, a change house, a utility block or a bathhouse. Thanks to the use of glassine, the wooden parts of the structure are reliably protected from condensate and fumes, which, in the absence of protection, lead to premature decay of the wood, damage to it by mold, fungus and other unpleasant consequences.

It is an obvious fact that when wet, the most common insulating materials, such as mineral wool, significantly lose their physical insulation properties. Glassine P-250 as a vapor and waterproofing protects thermal insulation from moisture penetration and significantly extends its service life. In this form, glassine P-250 can be used to protect insulation on pitched roofs and under the outer skin on facades, when installing ventilated facades, laying underground utilities that require insulation (heating mains, water supply), or laying floor coverings on concrete bases.

Reasons for popularity
strength. If a strip 50 millimeters wide is cut from a sheet of parchment, it will withstand a tensile force of 250 newtons;
waterproof. Glassine P-250 remains absolutely waterproof under a pressure of 0.01 atm. within 10 minutes, and during the day the water absorption of glassine P-250 does not exceed 20%;
elasticity. With a bending radius of 5 mm at 18°C. glassine is resistant to cracks, breaks and retains its integrity;
resistance to temperature changes. The softening temperature for the use of petroleum bitumen, which is an impregnation for glassine P-250, exceeds 45°C. This guarantees the absence of melting and spreading of the material even in hot summer weather, and due to its frost resistance in cold weather glassine P-250 retains all its qualities and does not crack;
ease of use. When working with glassine, no special skills are required;
non-toxicity. When heated, glassine does not emit any substances that are hazardous to human health;
price. Glassine P-250 is one of the most affordable vapor and waterproofing materials on the market.

The technology of laying glassine P-250 is very simple and does not differ in any way from the method of using glassine of other brands. The basic rules are that glassine is laid with an overlap of 100-150 mm, while the joints are glued with mastic. For better vapor and waterproofing, experts recommend a 2-layer installation.

Vapor barrier is necessary to prevent the harmful effects of moisture on the insulation layer of the structural elements of the building. For its arrangement in private construction, rolled material is used - glassine.

Glassine is a vapor barrier or waterproofing?

With the independent construction of a private house, the owner has to independently select materials. When it comes to installing a vapor barrier, the owner often wonders if glassine is suitable for this work, or is it still necessary as a waterproofing? The answer is pretty simple. The material is suitable for both types of work.
Using the example of a roofing “pie”, you can see that bituminous sheets are used as a vapor barrier for insulation from the side of the room, as well as waterproofing under the roofing. There are three schemes for laying the material, where it plays a different role.

Schemes of roofing "pies"

In this scheme of the roofing "pie" of a flat roof, glassine is used for vapor barrier:

• concrete floor slabs;
• double layer of glassine;
• thermal insulation layer;
• cement-sand screed;
• roofing.

The following scheme provides for the use of the material as a waterproofing of a pitched roof with a cold attic:

• rafters sheathed with a solid wooden crate;
• double layer of glassine;
• roofing material.

In the latter scheme, glassine serves as a waterproofing and vapor barrier. Such a "pie" is used for gable roofs with a warm attic:

• internal sheathing of the attic with sheets of plasterboard;
• rafter system;
• glassine vapor barrier from the side of the attic;
• thermal insulation layer;
• counterlattice;
• waterproofing layer of glassine;
• roofing.

From the considered schemes, we can conclude that glassine is not a roofing. Although, many are mistaken in these matters, and use the material to cover sheds and other outbuildings. Naturally, the result of illiteracy is a leaky roof in a year.

Scope of glassine as a vapor barrier material

Before finding out the scope of the material, it is necessary to understand two concepts. Vapor barrier and waterproofing are the protection of the heat-insulating layer from moisture. It can be in two states: as a vapor followed by the formation of condensate or liquid. So, vapor barrier will save from penetration to the insulation, and waterproofing prevents the penetration of liquid.
As a vapor barrier, bituminous sheet can be used in the following situations:

1. The bottom lining layer of the roofing pie.
2. Protection of the heat-insulating layer outside and inside the room from condensate. Preventing moisture penetration will extend the life of the insulation.
3. Condensate insulation between chipboard boards and the reinforced concrete base of the building.
4. The use of material for packing metal products prevents the penetration of condensate, which causes corrosion of the metal.

Glassine is well suited for vapor barrier in the construction of winter baths. But for the steam room it can not be used. Under the influence of high temperatures, the material begins to emit an unpleasant odor with toxic substances.
Glassine refers to rolled materials and to a greater extent it is laid on top of the insulation under a hard roof covering, such as slate or tile. The elastic structure allows the material to be used on pitched roofs. Under a soft roof, for example, shingles, experts categorically do not recommend using glassine. This is due to the difficulty of providing adequate insulation in difficult areas such as ridges or valleys. And yet, poor fixing of the substrate with the base will lead to the tiles slipping along with the vapor barrier.
Wooden structures are covered in places of contact with concrete or soil. This keeps the wood from rotting. The vapor barrier between two dissimilar surfaces prevents the formation of condensate.

Sheets are widely used as a vapor barrier in the construction of outbuildings, hinged and ventilated facades.

It turns out that glassine is still more used as a vapor barrier. It is vital to protect and increase the life of the thermal insulation layer.

What is glassine and its varieties

Glassine is cardboard impregnated with special bituminous solutions. It is produced according to two standards: GOST and TU. Such material differs in the density of cardboard and the length of the roll. For example, the P-350 brand according to GOST has a density of 350 g/m2 and a web length in a roll of 20 m. but its cost is higher.
At the moment, manufacturers offer three brands:

1. P-250 is resistant to moisture up to 10 hours.
2. P-300 will not let moisture through for 20 hours.
3. P-350 has a water absorption level of up to 20% by weight. Such material is used for arranging vapor barrier during roofing work.

It should be noted that of the presented grades, P-250 according to GOST is not produced at all, and P-350 has ceased to be produced according to GOST, since the material is considered obsolete and is becoming a thing of the past.

Advantages and disadvantages of the material

Before deciding to use the material for the manufacture of a vapor barrier, you need to find out all its pros and cons.
The material has the following advantages:

• The main advantage that attracts private developers is the low price compared to modern materials designed for these purposes.
• The canvas can be called universal. It is used as a vapor barrier, and installation can be carried out even by an inexperienced builder. Depending on the base, the sheets are fastened with staples, gluing or construction tape.
• Light weight does not require reinforcement of the roofing system or the foundation of the building.
• A canvas that has become unusable can be quickly replaced with a new one, of course, for this you will have to dismantle the top finishing coating.
• Differs in moderate water absorption and tensile strength.

In addition to many advantages, there are still significant disadvantages:

• Although glassine is resistant to moisture, it should not be laid on a wet surface;
• Installation at low temperatures will lead to a break in the sheets;
• The sun's rays are detrimental to the structure of the material, so it cannot be used on an open surface;
• From the high temperature, bituminous impregnation begins to melt, which is accompanied by the release of toxic substances and an unpleasant odor.

After weighing all the pros and cons, before using the material, it does not hurt to get additional advice from builders.

Drawing conclusions

The conclusion suggests itself that glassine is a vapor barrier. And the manufacturers themselves position this material in this way.

If we talk about the application, then modern vapor barrier membranes and films have long ousted glassine from the market, due to their better characteristics. In addition, for the construction of modern roofs and facades, the material does not meet the requirements. The best field of application of glassine as a vapor barrier is country outbuildings.
And some more information about glassine in the next video.