Glassine p 300. Roll roofing with glassine. Maintenance and repair
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 bitumen covering layers, which ensures a small specific gravity, non-toxic and good elasticity of the material when 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 safe protection designs. 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 used before it. of this type. No harmful emissions occur during production, no presence is required running water and waste disposal. Natural bituminous fumes are removed from production by the system forced ventilation. All this makes the material even more environmentally friendly.
*We would be grateful if you leave your review about the product below.
This information is taken from the website of the RDS Stroy company https: // site
From the page https://website/catalog/pergamin/pergamin_p_300_15_kv_m/
used in modern construction, need a protective vapor barrier, which is currently glassine. It has become a worthy replacement for materials such as roofing felt and only, containing large concentrations of carcinogenic tar.
Glassine production eliminates harmful emissions and does not require waste disposal. It is very important to use protective roofing material when we are talking about using thermal insulation material, for example, which easily absorbs moisture, swells and collapses. To prevent this from happening, a vapor barrier is laid under and above the mineral plate.
Glassine - what is it?
Glassine is a roofing material used to protect not only roofs, but also walls from wind, moisture and condensation. It is made by impregnating cardboard with bitumen with a low softening point of 45-50 degrees.
The basis for glassine is a special roofing cardboard, consisting of 20-40 layers of wood fibers, straw, cotton, cellulose. It also includes nonwovens for better moisture absorption. To achieve excellent technical characteristics of glassine, its cardboard base is passed through a press with a pressure of 300 g/m2.
Application area
Having learned how glassine is produced, what it is, we will consider in what types of work one cannot do without it. This gasket material is used as a vapor barrier layer not only for roofing, it is also sheathed with wooden structures in places where they come into contact with soil or concrete in order to avoid dampening and swelling of wood products. It is used in the construction of baths and saunas, if they are erected as separate buildings on the street. In this case, 2-3 layers of glassine are laid along the perimeter of the bath, which serves as a limiter for thermal insulation both from the inside and outside. Wide application he was found in the construction of multi-storey residential buildings.
Glassine is used as a bottom lining in puff and also in cellars it is rolled out on the floor, making a side up to 0.5 meters high, going on the walls. Here it performs a waterproofing function so that close-lying groundwater does not penetrate into the basement.
Glassine: characteristics and properties
There are several types of glassine, differing from each other in the thickness of the cardboard used and the type of bitumen required for impregnation. These indicators also affect the price of the material.
Glassine brand P 250
Despite its thinness, it is a very durable and flexible roofing material that ensures a long service life. The advantage is the low price. Able to protect the surface from moisture penetration for 10 hours. To break glassine P 250, you need to apply a tensile force of at least 16 kgf.
Glassine grade P 300
Very flexible and durable. Able to withstand a force of 21 kgf in tension without visible deformation. It can retain moisture on the surface without penetration for about 20-22 hours.
Glassine brand P 350
The most dense and durable of the three options. Although the price is higher than that of the previous representatives, it is still acceptable for the buyer. Resistantly endures a force of 25 kgf, and also retains moisture for more than 22 hours.
How denser cardboard for glassine, the more it absorbs bitumen, becoming elastic and durable, its water-repellent properties increase. Its high strength is due to the fact that it is used as the bottom layer in the roofing device, which is not subject to strong mechanical loads. Glassine (what it is, described above) has another property, such as heat resistance. With a high melting point, it easily tolerates the summer heat. Due to its elasticity, it is not prone to cracking in winter cold. Service life of glassine not less than 10 years. It is very easy to install, because of its lightness, it can be handled by one person. All these properties can be called advantages. final chord- it is his low price, which deprives it of almost all competitors.
The most famous glassine is roofing, the manufacturer is TechnoNikol. The company claims that it has brought the material to perfection, giving it even the best properties than what is provided for in SNIPs and GOSTs. Thanks to high quality, which the manufacturer endows with glassine, customer reviews addressed to him are only positive.
Despite all the advantages, glassine is not used as a separate element for roofing, since it does not have its own protective layer with which it could protect itself from aggressive influences. environment: atmospheric precipitation, high and low temperatures, especially from their sudden changes, from direct sun rays, as well as from various mechanical damage. studying specifications such a material as glassine (what it is, what it is made of), we can conclude that its main area of application is the implementation of the hydro- and vapor barrier protective function of the roof as a substrate.
As a rule, glassine is laid on top of the insulation to protect it from moisture and condensate vapors, and then laid directly roofing, whether it be slate, metal profile or tile. Most often it is used on due to the fact that it is very elastic, lightweight and has excellent protective properties.
Glassine is produced in rolls with a width of 1, 1.025 and 1.05 meters. The weight of 1 roll is 15 kg (20 m2) or 30 kg (40 m2).
Vapor barrier is necessary to prevent the harmful effects of moisture on the insulation layer structural elements building. For its arrangement in private construction, rolled material is used - glassine.
Glassine is a vapor barrier or waterproofing?
At self construction the owner of a private house 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.
On the example of a roofing "pie", you can see that bituminous sheet is used as a vapor barrier of the insulation from the side of the room, as well as as a waterproofing under the roofing. There are three schemes for laying the material, where it plays a different role.
Schemes of roofing "pies"
In this roofing "pie" scheme 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. This "pie" is used for gable roofs with 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:
- Bottom lining roofing cake.
- Protection of the heat-insulating layer outside and inside the room from condensate. Preventing moisture penetration will extend the life of the insulation.
- Condensation insulation between chipboard boards and reinforced concrete base of the building.
- Use of packaging material metal products prevents the penetration of condensate, which causes corrosion of the metal.
Glassine refers to rolled materials and, to a greater extent, it is laid on top of the insulation under a hard roof covering, for example, 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 the use of 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. The indicators of a similar brand produced according to TU, respectively, are 180–200 g / m2 × 15 m. but its cost is higher.
At the moment, manufacturers offer three brands:
- P-250 is resistant to moisture up to 10 hours.
- P-300 will not let moisture through for 20 hours.
- 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 intended for these purposes.
- The canvas can be called universal. It is used as steam and waterproofing, 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 base 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 of sheets;
- The sun's rays are detrimental to the structure of the material, so it cannot be used on an open surface;
- From 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 professional builders.
Drawing conclusions
According to the characteristics of glassine, it can be seen that although it is made with the addition of bituminous impregnation, the base still remains cardboard. She is afraid of water and can only be used as a waterproofing material in rare cases.The conclusion suggests itself that glassine is a vapor barrier. And the manufacturers themselves position this material in this way.
In terms of application, modern vapor barrier membranes and films have long ousted glassine from the market, thanks to their the best performance. Moreover, for the construction modern roofs and facades, the material does not meet the requirements. Best area the use of glassine as a vapor barrier is a country outbuilding.
And some more information about glassine in the next video.
Glassine is a vapor barrier coating that is used in construction to protect the insulation layer from moisture. It has successfully replaced such ecological harmful materials, as only and only, containing carcinogenic tar in its composition. The production of a vapor barrier is based on the processing of roofing paper with low-melting bituminous compounds, due to which the material acquires strength and water-repellent properties.
Glassine: technical specifications
Roofing cardboard, from which glassine is made, consists of 40 or more mixtures various materials: wood, linen, cotton, etc. In 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 is able to 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 with a width of 1.025x1.05 m and a weight of 15-30 kg.
Another variety vapor barrier material is a liquid glassine, which is a polymer composition. This universal remedy, which 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 the construction of roofs or floors. 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 mounting complex structures With unusual shapes. Due to its properties - elasticity, low weight, it can be easily and quickly installed on almost any surface (walls, floors, roofs).
The material is mainly used to protect wooden structures from condensation. As a result, the wood does not deform and the service life of such coatings increases. A vapor barrier is successfully used in the construction of baths and saunas. For efficiency, the product stacked in several layers around the perimeter.
Another area of application is the protection of the foundation from moisture. The product is used in the installation of foundations of multi-apartment buildings, plinths and walls.
When installing a floor vapor barrier a layer of glassine is alternated with hot bitumen, which is laid in the last layer. Such a design for long time guarantees reliable protection from water vapor.
Installation of vapor barrier protection of basements is being done, car garages And hinged facades. The insulator finds application 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 on the base and cut according to the required dimensions.
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 concrete with bituminous mastic. If this is not possible, then it is glued with self-adhesive tape.
The insulator is fixed to the wood base with a stapler, while 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 edge. The seams are processed bituminous mastic or double sided tape. If the need arises, then the installation of the second layer of glassine is done.
Coverage needs to be checked regularly.– in case of damage, the vapor barrier is repaired.
Dismantling is not difficult, since the damaged area can be easily cut out with a special cutter or any sharp knife. It is only necessary to disassemble the finish coating and remove the rotten sections of the material. If necessary, replace the frame or screed and re-lay the vapor barrier.
Liquid glassine is applied by brush, roller or spray. Moreover, the treated surface does not have to be specially prepared, the composition can also be applied to a wet or dusty surface.
The material penetrates deep into the pores of concrete or wood and removes moisture thanks to the water-displacing additive. This impregnation provides long-term protection. and waterproofing. After hardening, liquid glassine resembles soft black rubber.
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 level of ignition, as the material has paper base with bituminous 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 ° C), as a result of which the structure of the product becomes brittle.
- Under the influence of ultraviolet rays, glassine is gradually destroyed, so it must be periodically updated in building structures.
Despite the fact that glassine has moisture-resistant properties, due to prolonged exposure to moisture, the material may collapse. Therefore, to ensure the watertightness of structures and increase the 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 in their properties to glassine, have higher strength and durability.
New generation vapor barrier materials can provide complete tightness of the structure and high level thermal insulation. However, the cost of such waterproofing films is much higher than glassine.
Therefore, planning construction works take into account the positive and negative characteristics roofing material. During its operation fire and sanitary and hygienic standards are mandatory.
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.
Reading time ≈ 3 minutes
When faced with the choice of roofing material, a number of factors are taken into account, such as the weight of the material, technical specifications, the influence of the atmosphere, strength, etc. Among the fundamental criteria is the price side of the issue. The most budgetary and affordable methods of arranging a roofing system are roll materials, whose use does not require professional skills and special tools.
The modern roofing system is constructed according to the “pie” principle, that is, the roof consists of several layers, each of which performs its own technical function. One of these layers is glassine (although the roof is not the only area of its application). What are the technical characteristics of glassine, features and disadvantages of this material? About this in our article with photo and video materials.
Application area
First, let's define what is parchment? Glassine - cardboard, which is processed at the production stage with special solutions based on bitumen.
To date, the scope of glassine includes:
- use to provide vapor barrier - for example, when arranging garages and outbuildings;
- on pipe lines and heating mains;
- processing of reinforced concrete rings that need additional finishing and treatment with septic tanks;
- for temporary packaging of small items;
- used as a temporary cover;
- preservation of insulation from moisture;
- using soft roof glassine acts as a substrate;
- roofing glassine allows wood surfaces to “breathe”;
- glassine protects metal surfaces from corrosion.
Specifications of glassine
To date, this building material is produced in several brands, such as P-250, P-300 and glassine roofing brand P-350. The higher this indicator, the higher the strength and properties of glassine and the more worthy of its technical characteristics.
- Glassine P-250- tensile force is 15 kgf, there is no water on the surface of the material of this grade for 10 hours.
- Glassine P-300- tensile force - 22 kgf, water does not appear for 20 hours.
- Glassine P-350- this brand is used in roofing system, the level of water absorption is 20% of the mass, the tensile strength is 22 kgf, glassine retains its technical features up to +5 degrees, at a lower mark, cracks appear on it.
Advantages
For right choice you should carefully read some of the benefits of glassine:
- The most basic advantage of glassine is the cost of the material, the higher the brand, the more expensive the canvas.
- The versatility of the material - installation is so simple that it is not important to have professional skills to install it. There are several mounting options, it all depends on the base material - fixing with staples, gluing and construction tape.
- Light weight allows installation without additional calculation systems and works, such as strengthening the foundation, roofing system.
- Maintainability - the canvas is replaced quickly and it is not necessary to have skills.
- Breaking strength.
- Moderate water absorption.
Flaws
To make a correct assessment, it is important to familiarize yourself with the disadvantages of glassine:
- If the installation is carried out on a damp surface, the reliability of the material is drastically reduced.
- It is not recommended to work at low temperatures, as at sub-zero temperature it breaks.
- Ultraviolet rays destroy the structure of glassine and its installation on open surfaces is impractical.
- Elevated temperature can promote the release of harmful impurities.
