Roll roofing soft material, which is made by impregnating cardboard with bitumen, is glassine. This substance has become a worthy alternative to roofing felt and its modified analogue, only leather, which are now almost impossible to find on the market.

The history of soft roofing materials begins at the end of the 17th century, when paper was impregnated with heated tar. At the end of the First World War this technology has undergone significant changes - people have mastered the technology of preparing roofing bitumen.

GOST of the current glassine is 2697-83. The material is used to isolate the insulation from moisture, accumulation of condensation and fumes from wood that is in contact with metal structures. Glassine is also widely used as a packaging material in heavy industry, especially for pipe insulation. Additionally, it is used during laying heating mains, because the excellent vapor permeability of this material prevents rapid rusting of pipes, thereby increasing their service life. In winter baths, glassine provides additional protection for the log house from fumes, and for the outbuildings from cold and the formation of condensation on the thermal insulation sheathing.

The standard packaging of glassine is a roll with a volume of 15 m2. Bespokrovny insulating material has a cardboard density of 180-200 g/m2. Roofing cardboard consists of layers of 20 to 40 planes of compressed wood fibers, cotton, straw, flax, cellulose and semi-cellulose, and rags. It is thanks to all these components that the material provides such effective moisture absorption.

Low cost is one of the key advantages of glassine. Acceptable price due to minimal costs, which the manufacturer uses to create the material. Unlike roofing felt, which is created using carcinogenic tar, the new substance has more high level environmental safety.

The properties of glassine are absolutely independent of temperatures, which is why it lasts for an extremely long time.

High flammability is a very significant disadvantage of the material. It burns so well that it is sometimes even used for kindling. His bad smell and fragility are also not advantages.

According to special GOST standards, glassine has:

• waterproof;
• hydroabsorption;
• vapor barrier;
• resistance to breaking load;
• flexibility;
• matte surface;
• lack of greasy stains, unevenness of coating structures, folds.

Excellent quality glassine, rolled into a roll, has dense and even ends.

Types of material

There are several types of glassine, which differ in the type of cardboard and properties:

1. Brand P-250:

• tensile force – maximum 15 kgf;
• moisture does not appear on the material for 10 hours – at p = 0.001 MPa.

1. Brand P-300:

• No moisture appears on the material for 20 hours – at p = 0.001 MPa.

1. Brand P-350:

• tensile force – maximum 22 kgf;
• hydroabsorption – 20% of the total mass;
• Cracks appear on the surface of the material only if the room temperature drops below +5 º C.

Roofing glassine brand P-350 creates additional ventilation system in the roof so that the insulation layer can breathe and remain dry. After all, it is with the help of glassine that moisture accumulates on its surface and evaporates. Thus, it is possible to maintain the integrity of the thermal insulation and its optimal condition.

When choosing a material, give preference not to the most expensive as the best, but to the one whose characteristics are suitable for your case. Despite the widespread distribution of more expensive or cheaper analogues, glassine remains the most popular among roofing specialists.

Transportation and storage of rolls takes place in a strictly vertical position and on special pallets of a special shape. The height of the material is laid in a maximum of two rows. Plastic containers are also great for these purposes. Due to its high flammability, for safety reasons glassine should be stored at least 1 meter away from fireplaces and other heating elements, always in a dry room.

Increased air humidity will cause the material to swell and become ineffective in the future even during its intended use. Wet glassine will not be able to correctly perform its main function unless it releases the accumulated liquid to the insulation, which should not be allowed. If the packaging or the material itself is damaged, make sure it meets quality standards before installation.

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Glassine P-350 is an effective, reliable and durable rolled material for vapor and waterproofing. It has been used in construction for decades and is the best brand of glassine. This product differs from other types in higher quality and denser cardboard, which is impregnated with a large amount of petroleum bitumen. The cardboard base of glassine P-350 is made from several dozen layers of straw, cotton, rag pulp, wood fibers, straw and wood cellulose. The cardboard is then compacted for strength and dewatered for good absorbency. Glassine P-350 has a wide range of applications.

Glassine P-350 is used as:

• Packaging for transportation and storage of various building materials and equipment.
• Lining material for the lower layers of the roofing carpet of bituminous shingles.
• Gaskets between wooden elements and concrete, brick walls/metal structures (for example, when laying wooden beams in a wall or covering wooden door or window frames).
• Windings of heating mains.
• Linings under concrete mortar when pouring floor coverings in residential and industrial premises.

Advantages of Glassine P-350:

• Waterproof. This product perfectly protects surfaces from evaporation, moisture and condensation. In addition, it quickly and effectively removes vapors and moisture, preventing them from accumulating inside the insulation. Practical experiments have shown that after 20 hours of being under a pressure of 0.001 MPa, no signs of water are found on the surface of the composition. Its water absorption does not exceed 20% by weight when tested during the day.
• Strength. The product can withstand a tension force of at least 267 N.
• Resistance to low and high temperatures. The product retains all its qualities, does not crack, remains elastic under significant sub-zero temperatures and does not leak in hot summers (up to +50 °C). This property is especially valuable in Russian climatic conditions, since in our country there is a significant difference between winter and summer temperatures.
• Flexibility. Tests on a 5 mm rod at a temperature of 18 °C did not reveal a single crack on the surface of the coatings.
• Light weight. This product does not have coating layers of bitumen, which makes it easy and convenient to install.
• Environmental friendliness. Neither the materials nor the impregnation contain toxic substances. This product has passed a sanitary and epidemiological examination, a test for fire safety. It has all the relevant GOST certificates of the Russian Federation.
• Easy to use. No special skills are required to work with this material. Installation features depend on the application. The basic rules are that the strips are laid with an overlap of at least 10 cm, and the joints are glued bitumen mastic. For better vapor and waterproofing, experts recommend 2-layer installation.

Production, price

We sell Glassine P-350 in bulk and at competitive prices; please read the instructions when using. We carry out prompt deliveries throughout Russia and the CIS countries using the services of leading transport companies, and by own transport. Now in construction, Glassine P-350 is one of the most popular and effective types isolation. Favorable cost, environmental friendliness, excellent quality, excellent characteristics have ensured its great popularity among similar products. Buy the best! The managers of our paint and varnish company will answer all your questions. Call!

Relatively recently appeared waterproofing material economy class - roofing glassine. It is not very durable; to install a new roof, it is better to invest in more expensive materials. But in an emergency situation, when you urgently need to eliminate leaks but there is no money, glassine helps out.

Glassine - what is it?

Glassine belongs to the group of materials called coverless. Its composition is close to roofing felt: cardboard impregnated with bitumen.

Manufacturing stages:

• Cardboard is formed from 20-40 layers of wood and textile fibers(cotton, flax), straw, other cellulose materials.
• Dry thoroughly.
• Impregnated with bitumen.
• Pressed under pressure of about 300 grams per square meter.
• Rolled into rolls.

Please note

The vapor permeability of glassine and its waterproofing qualities are the main properties due to which the material is popular in private buildings. To this we can add ease of installation, strength, low price, excellent maintainability.

There are also disadvantages:

• Flammability;
• Insufficient environmental cleanliness. At elevated temperatures, it releases harmful volatile components;
• Full ventilation is required. The material tends to accumulate condensation, which can lead to rotting of the roofing materials;
• The service life of glassine is short. Manufacturers provide a guarantee of up to a year; in fact, high-quality material lasts 5-7 years. If you do not want to update your roof frequently, it is better to use more expensive materials.

Application of glassine

1. Waterproofing when insulating a bath. Glassine is attached to the base, then insulation (mineral wool), then thermal protective foil and finishing coat from the lining. The result is a fairly thick layer, but the thermal insulation is trouble-free.
2. Roof insulation, incl. timber and log houses. In this case, glassine is used as a vapor barrier; it is the bottom layer of the roofing cake.
3. Waterproofing of roofs, walls, foundations. The material is often used together with insulation. The slabs are insulated with glassine on both sides, i.e. it performs both waterproofing and vapor barrier functions.
4. As a vapor barrier between any surfaces: between reinforced concrete slabs, between wood and chipboard, etc.

In addition to roofs, the material is used for facades, ceilings, foundations, well rings, bridges, septic tanks, pipelines, and also as a temporary coating when stacking building materials.

Specifications

When choosing, you need to remember that there are several brands of material.

Please note

The properties of glassine depend on its modification. Brands differ in the density of bitumen impregnation: the more bitumen, the greater the density of glassine, weight and tensile strength.

• Glassine P 250 – weight of one square meter is 0.55 kilograms;
• P 300 – 0.6;
• Glassine P 350 – 0.75.

Tensile strength depending on the brand 15-25 kgf.

Water absorption – 15-20%.

Dimensions :

• The length of a roll of glassine is most often 20 or 40 meters;
• Area – 15, 20 or 40 square meters, tolerance half a meter;
• Width – 1 meter, 1.025 and 1.05, plus or minus half a centimeter.

GOST for this material is 2697-83.

• U quality material there must be smooth edges;
• There should be no greasy stains on the canvas.

When storing rolls, they should be installed vertically; they should not be laid down.

Cost of glassine

The price per roll of glassine depends on the brand:

• P 250 – from 80 rubles;
• P 350 – from 150;
• The price of glassine P 300 is from 120.

What can replace glassine?

Glassine or roofing felt - which is better?

The materials are similar in composition, but glassine is uncoated, and roofing felt has a coating. Due to this, roofing felt can be laid open method, it does not deteriorate from UV rays.

Please note

Glassine is not laid openly, because ultraviolet radiation destroys it. But glassine is suitable as a vapor barrier for the bottom layer of the roofing pie.

Both materials are not very durable. Bicrost euroroofing material is more durable, but its price is much higher.

Which is preferable, glassine or isospan?

Izospan is also a good waterproofing agent. Other properties of the materials are different:

• Glassine is stronger;
• Izospan - environmentally friendly pure material, unlike glassine;
• Glassine is flammable, isospan includes fire-fighting additives;
• Izospan is more durable;
• Glassine is cheaper.

Bituminous paper

Another analogue of glassine is BUB-120 (bitumen paper). The composition is the same, but the material is thinner and weighs less.

Features of laying glassine

• The material is laid with an overlap of up to 10 centimeters. When calculating glassine for the roof, you need to add another 10 centimeters per meter to the width of the roof. The vapor barrier for the roof is laid in several layers.

• You can attach the material in different ways: glue with bitumen mastic or construction tape, fix with nails or staples.

• Do not place on a damp base.
• You can't work when low temperatures(becomes brittle).

Our company has many years of experience in roofing construction different types and forms. Over a ten-year period, we have accumulated significant practical skills. We are ready to help make any of your roofing dreams come true. Photo reports of the work with descriptions and costs of services can be viewed

After the walls have been removed, the craftsmen try to cover the roof as soon as possible. This is due to the fact that when building materials are exposed to rain and other atmospheric influences for a long time, they begin to deteriorate. Except for the rafter system, the owner has to decide on the flooring. The market offers a huge variety of corrugated sheets, metal tiles, tiles, soft covers and slate. If it's a garage or shed with flat roof, then roofing glassine is laid on it.

The last option will be ideal for those who do not want to invest a lot of money, but want to get results high quality. Glassine is used not only for these purposes, for example, to protect ground floor Glassine is used as a vapor barrier and barrier for drip penetration of moisture into concrete. What is this material and is it really any good? It is the characteristics of glassine that will be discussed in this article.

What is glassine?

You are a little surprised when you find out that despite its composition, the glassine material has such unique properties. Its structure is paper, or more precisely, cardboard. It uses 20 to 40 layers of cotton, linen, straw and wood fibers that are woven perpendicularly and compressed to increase strength. After preparing the base layer of material, impregnation is carried out using petroleum products - resin or bitumen. The latter has a low melting point. In glassine this is provided for ease of subsequent installation. Finished products rolls up for greater ease of material delivery. It is the heir to the classic roofing felt, which was previously widely used in construction.

Glassine is suitable for:

• as an insulator against moisture and other influences for walls;
• glassine perfectly protects hot water supply and heating pipes that are laid in heating mains;
• glassine can be used instead of bitumen mastic for water wells or cesspools;
• glassine is an excellent base material for soft tiles;
• glassine is suitable as a barrier material between the foundation and the main plane of the wall;
• like a spacer between building materials in stock;
• glassine is used for storage metal parts to prevent their corrosion;
• glassine perfectly protects materials such as glass wool or other insulation from moisture.

As you can see, glassine has a fairly wide range of applications. It has its own varieties, which differ in price and are more suitable for certain tasks.

Varieties and properties

At the moment, there are three types of glassine in circulation, each with its own technical characteristics:

• glassine grade P 250;
• brand P 300
• roofing glassine grade P 350.

The difference lies in the tensile strength withstand, as well as the absorption capacity of the material. For example, the first representative holds a dense flow of water for 10 hours and will crack when exposed to a weight of 15 kg when tensioned. Glassine P 300 is able to retain moisture twice as long and withstand 22 kg of tensile strength. The latter material is most often used as a lining for roofing works, because it has the greatest thickness and better withstands temperature changes up to 5º above zero.

Like every material, it has its pros and cons. From strengths can be distinguished:

• ease of purchase and delivery;
• high elasticity of the material;
• good vapor permeability;
• excellent waterproofing properties; material
• easy to install with your own hands;
• low weight does not require a reinforced rafter system or foundation;
• It is easily restored after damage; only a small part can be replaced or even patched.

Among the disadvantages you should know about:

• the need to dry the surface before installation;
• loss of elasticity of the material in frost;
• instability of the material to ultraviolet rays;
• low ignition temperature due to the content of petroleum products;
• the material requires good ventilation, otherwise it will become a source of fungus development on other materials;
• at high temperatures has secretions that are harmful to human health.

By evaluating each aspect of the material, you can make a personal judgment about whether the material is suitable for the specific construction task you face.

Ruberoid or glassine

In fact, these two types of material are very similar. The production process is also almost identical. But based on its data, roofing material wins in some cases. This is due to the fact that an additional layer of heavy bitumen and asbestos powder are laid on both sides of the roofing material. They form a stronger and thicker layer that better resists moisture and exposure to the sun. Ruberoid can be used as an independent roofing material even on horizontal roofs.

The difference is also the reaction to ignition. In this case, the roofing material melts, but does not ignite with great force due to the presence of asbestos powder. But still, these two types of roll material are used in pairs. Glassine can be a lining that will provide better thermal insulation and vapor permeability. And roofing felt compensates for insufficient moisture retention properties in a horizontal arrangement.

Craftsmen loved glassine as a building and insulating material. Many people have been using it for years. To achieve best result For protection against moisture, workers ensure that it is manufactured in accordance with GOST. But today analogues with a finer structure have appeared, which will be relevant in some tasks. This is, for example, BUB-120. It is also bituminized cardboard. They are easier to deliver to heights and process.

For proper and long-term storage of glassine material, as well as roofing felt in a warehouse, they cannot be laid horizontally. Otherwise, it will be difficult or impossible to roll them out later, because the layers will simply stick together. It is recommended to place glassine rolls vertically, maintaining a certain distance. The room should be well ventilated so that harmful emissions do not accumulate in it. Also, the area should be free of moisture. Before using glassine material for a specific surface and area, it is worth considering in advance whether it will be easy to access after use. warranty period service, and it is approximately 1 year. After which you will need preventive examination and possibly replacement.

Pay attention! In some information articles you can find information that glassine is used to decorate the roofs or walls of baths and saunas. But agreeing to this is worth thinking a hundred times. Consider the disadvantages given above and whether such a bath will be more beneficial or harmful to health.

If you have to purchase glassine yourself, be sure to check a few things. Immediately ask the seller for a certificate of conformity of the material with a description of the characteristics and date of manufacture. If the material has been stored for a long time, cracks may appear in it, which will only be noticeable when the roll is completely unrolled. Inspect the edges, they should be smooth without tears or cracks. Carefully evaluate the surface, it should be uniform, without obvious greasy spots. If something causes you doubts, then refuse the purchase, because later it will cost a lot of money to replace it.

Glassine is a vapor barrier coating that is used in construction to protect the insulating layer from moisture. It successfully replaced such environmental hazardous materials, like roofing felt and only those containing carcinogenic tar. The production of a vapor barrier is based on treating roofing cardboard with fusible bitumen compounds, due to which the material acquires strength and moisture-repellent properties.

Glassine: technical characteristics

Roofing cardboard, from which glassine is made, consists of 40 or more mixtures various materials: wood, flax, cotton, etc. During the process of impregnation with bitumen and other additives, the cardboard mass is pressed under high pressure.

The resulting material has high strength and durability, it can withstand fairly high loads. There are several types of vapor barrier - P250, P300, P350, P400. The marking indicates the density (thickness) of the product. Manufacturers produce glassine rolls 1.025x1.05 m wide and weighing from 15-30 kg.

Another type of vapor barrier material is liquid glassine, which is a polymer composition. This is a universal product that can be used for waterproofing concrete and wooden structures.

Glassine is used as a vapor barrier in the construction of buildings. The product is used as a waterproofing substrate in roofing or floor construction. So, when installing the roof with the first layer insulation is laid, then a vapor barrier follows, which is closed finishing material: metal profile, metal tile or slate.

The product is widely used for installation complex structures With unusual shapes. Thanks to its properties - elasticity and low weight, it can be easily and quickly installed on almost any surface (walls, floors, roofs).

The material is primarily used to protect wooden structures from condensation. As a result, the wood does not deform and the service life of such coatings increases. Vapor barriers are successfully used in the construction of baths and saunas. For product effectiveness laid in several layers around the entire perimeter.

Another area of ​​application is protecting the foundation from moisture. The product is used when installing foundations apartment buildings, plinths and walls.

When installing a vapor barrier on the floor A layer of glassine is alternated with hot bitumen, which is laid as the last layer. This design guarantees for a long time reliable protection from water vapor.

Installation of vapor barrier protection for basements is being carried out, car garages And curtain facades. The insulator is used in the construction of heating mains, where it is mounted using clamps, wire and adhesive tape.

Before installation workplace cleared of debris. A roll of glassine is rolled out onto the base and cut to the required size.

When laying, the insulator is glued to the base to ensure the tightness of the vapor barrier. The first row of the insulator is attached to the concrete using bitumen mastic. If this cannot be done, then it is glued with self-adhesive tape.

The insulator is fixed to the wood base with a stapler; the joints must be additionally sealed with double-sided tape.

Next, subsequent rows of glassine are installed, an overlap of 15 cm is made along the edges. The seams are treated with bitumen mastic or double-sided tape. If the need arises, a second layer of glassine is installed.

Coverage should be checked regularly– in case of damage, the vapor barrier is repaired.

Dismantling is not very difficult since the damaged area can be easily cut out special cutter or any sharp knife. All you have to do is disassemble the finishing coating and remove rotten areas of the material. If necessary, you need to replace the frame or screed and re-lay the vapor barrier.

Liquid glassine is applied with a brush, roller or spray method. Moreover, the surface to be treated does not need to be specially prepared; the composition can be applied to a wet or dusty surface.

The material penetrates deeply into the pores of concrete or wood and removes moisture thanks to a water-displacing additive. This impregnation serves as long-term protection and waterproofing. After hardening, liquid glassine resembles soft rubber black color.

Advantages

Flaws

• The service life reaches 5-7 years, after which the product must be replaced due to a decrease in vapor barrier properties.
• High ignition rate as the material has paper base with bitumen additives.
• Selection harmful substances at elevated temperatures and the appearance of a pungent odor that persists for a long time.
• Elasticity decreases at low temperatures (-40 o C), as a result of which the structure of the product becomes fragile.
• Under the influence of ultraviolet rays, glassine gradually deteriorates, so it must be periodically renewed in building structures.

Despite the fact that glassine has moisture-resistant properties, the material may deteriorate due to prolonged exposure to moisture. Therefore, to ensure waterproofness of structures and increase service life, it is necessary to install ventilation.

Now in construction along with glassine Two-layer vapor barrier films are used that do not allow moisture and water vapor to pass through. They are superior to glassine in their properties and have higher strength and durability.

New generation vapor barrier materials can ensure complete tightness of the structure and a high level of thermal insulation. However, the cost of such waterproofing films much higher than glassine.

Therefore, planning construction work positive and negative characteristics roofing material. During its operation Fire and sanitary standards must be observed.

Glassine is the most budget material for installation of vapor barrier. It can be in demand for the construction of various outbuildings on suburban areas and other objects.