Vapor barrier for ceiling hardwood floor

Posted on 30.01.2018 in name of category by

Vapor barrier for ceiling wooden ceilings: materials, installation, reviews

When erecting the house first question vapor barrier overlap does not arise. On this issue home owner starts to think when it comes to thermal insulation of the room. It turns out that not all domestic masters know how to equip a vapor barrier. It is also important to decide what material to use for this purpose. After all, a simple film, for example, is used less frequently today.

The need for a vapor barrier in the ceiling overlap

Vapor barrier for ceiling wooden ceiling is needed. This will avoid the penetration of vapor into the layer of insulation. Materials will be protected from the damaging effects of moisture. This will avoid contact with moist air heater. If we ignore these rules, it will be covered with mold and fungus. The entire building will last much less. After all, the design should protect against the negative impact.

The presence of a vapor barrier layer can not only protect the materials from the water, but also reduce heat loss. If applied coating layer foiled, they reflect most of the heat, sending back into the room. But moist air can freely escape to the outside. The main task of the cover protrudes from the insulation protection accumulation of moisture therein.

Before you will be carried out in the vapor barrier for ceiling hardwood floor, you must purchase the material, taking into account the budget of the work, as well as goals. On this basis, the following materials:

  • polyethylene;
  • with the membrane effect film;
  • asphalt;
  • varnishes;
  • mastics;
  • foil materials.

When it comes to films with a membrane effect, they will not allow moisture inside the premises. Among other things, they prevent her coming out. Varnishes and mastics have the same effect. And here is one of the cheapest material is asphalt. Quite often, experts advise not to use the conventional polyethylene film vapor barrier for installation. It is used only in the most extreme cases. Such a coating will not pass air, making the construction of a sealed box. In this case, the room is not ventilated, condensation collects on the surface of the film. As a result - the moisture accumulates inside the building, contributing to the emergence of mold and mildew.

Let's say you decide you need a vapor barrier for the ceiling in the hardwood floor. In this case, the asphalt can be used only if the money is not enough for a high-quality material. He is not durable. Choose it mostly for the reason that it has a low cost. According to experts, the best solution is a vapor barrier on the basis of liquid pastes or membrane films. They can be used to reliably protect the overlap providing the output moisture vapor to the outside.

Recommendations for mounting vapor barrier

Vapor barrier for ceiling hardwood floor should be not only properly selected and installed, and technology. As a rule, the material is placed inside the premises. If the temperature drops in the cold large enough and temperatures reach a point below 30 ° C, the vapor barrier is installed on both sides. This will prevent the occurrence of condensation in the insulation and retain more heat indoors. But that is not all. It should be remembered that the vapor barrier should be laid at the ceiling until you equip a layer of insulation. Canvas stretched without sagging and wrinkles. Nearby pieces overlap overlapping. All joints are glued with tape construction that allows for the passage of air.

Vapor barrier - foil, which is fixed with special nails with a wide hat. Replace such hardware can be stapled staple gun. Under these should enclose the gasket made of cardboard or any other similar material, to prevent film rupture. The step between the attachment points should not be more than 30 cm. When the film plan hem overlap to the Draft, fixing by means of metal profiles or lath elements.

Quite often handyman thinking about how to properly install a vapor barrier. Which side to lay the material, it is important to decide before the start of work. Thus, the smooth side of the film intended to face outwards towards the rough slab. If confused, then you can get the opposite effect. It lies in the fact that water vapor will settle inside the insulation. This will inevitably lead to the destruction of the material. Between the vapor barrier and roofing material should leave a small gap. This is true when it is planned to lay a vapor barrier on both sides. This approach will allow moist air to circulate freely and to go outside.

Expert advice for the installation

When laying a vapor barrier is necessary to exclude the presence of holes and gaps between the webs. This will ensure the protection of thermal insulation and structural elements of the building. If you apply a vapor barrier sheet, the installation is performed from the roof. It is located under a layer of insulation material, after its complete installation. Outside should be one more layer of a vapor barrier. This will ensure better protection for the insulation. Liquid ceiling steam is applied externally to the previously prepared design. After drying the first layer is necessary to put two spaced for full drying. It is better to carry out such work in warm weather. It is important to wait until the rain.

During the construction of any house requires a vapor barrier. Which side to lay the material, you have to ask at the outset of the work. For example, the foil webs rather actively used today for water vapor retarder layer. They have one advantage, which is the ability to reduce heat loss. To do this, foil side facing into the room to heat escapes back into the house.

Reviews of the standard vapor barrier for ceiling

If you still think, what to choose a vapor barrier for ceiling home, you should listen to the opinion of the owners of property. They argue that the standard will not operate correctly if you place it on the inner side of the enclosing structure. Water vapor will not flow into the ceiling and insulation. The most common materials of this type are: "Tehnonikol9raquo ;," Izospan9raquo ;, and "Ekolayf9raquo ;.

Reviews of the vapor barrier layer with reflex

Vapor barrier - materials that can be combined into one group. As one subspecies select variants with reflex layer. According to its users, they have a reflective effect. Do not miss the steam radiant heat goes into the room. They act as additional insulation. Their use, as claimed by domestic masters, most effectively when indicated an increased steam. The most widely used "Penofol9raquo; and "Alukraft9raquo ;.

Reviews of the vapor barrier with controlled permeability

If you're wondering what to use as a vapor barrier of the ceiling, you can see the materials with limited permeability. As pointed out by customers, this approach is rational in the case where the housing is not operated continuously. This could include country houses. wherein the vaporization cycle is not stable. And after the departure of the hosts in the regeneration of the vapor barrier layer with limited permeability vapor will escape to the outside. According to buyers, such membranes are able to maintain the desired level of vapor barrier. Their permeability is Sd = 2-4 m.

Reviews of the vapor barrier with variable permeability

This type can be used when renovations are taking place in the garret floor. In this approach, only steam may lay on top, ventilation gap without settling. Permeability coefficient in this case varies in a range of 5 m, which is true for a dry membrane; if it is a moist material, the said parameter is 0.2 m. Most often consumers choose Delta-Sd-Flexx, which relates to the mean vapor barrier.

Membranes are considered a new type of vapor barrier materials. According to buyers, they provide steam and Gidrobarer. When compared with the films, the latter does not pass water and steam, which does not depend on the direction. If we are talking about the membranes, they are characterized by one-way permeability. This indicates that it was not a matter of indifference which side they are placed. Property owners emphasize that the steam will pass through the material, while the water leak will not be able to meet. It is noteworthy that membranes can be single, double or multi-layered. The most economical is the second option. The effectiveness of milestones cases remains at the same level.

The cost of vapor barrier material

Vapor barrier - a film that can be manufactured by different companies. When it comes to material gidroparoizolyatsionnom company "Izospan9raquo ;, the kind represented by the letter B, the consumer cost of 1000 rubles. If you want to select vetrovlagozaschitnuyu membrane "Izospan A", then it will have to pay for 1500 rubles. On sale you can find more product and to protect the material from steam and water. If he has the name "Izospan D», you will have to pay 1400 rubles. Vapor barrier for the ceiling of the wooden ceiling, the price of which is 1300 rubles., It can be represented also reinforced film. If you prefer this kind, then we can consider Polinet Lux, which has the following dimensions: 2x25 meters.

We have examined the types of vapor barrier for ceiling. Depending on your budget and your goals, you can choose one of them. It is not always advisable to save, because, for example, an ordinary film can not fulfill its tasks.

Guide for safe vapor barrier wooden floors

To ensure reliable overlap protection against moisture, it must be performed hydro- and steam. The first material prevents moisture in liquid form, and does not allow the second pair to destroy the structure. Vapor barrier for a ceiling at a hardwood floor is particularly relevant when it is planned insulation, i.e. a thicker structure there is a transition between the positive and negative temperature (condensation point).

This issue is very important, because if you put the stuff is not there, it will not work or will be, but it is wrong. It is important to remember one rule: always fit steam from the warm air, and the waterproofing from the cold. Typically, these materials work together to provide reliable protection floors in the house from any kind of moisture.

Insulation film is laid over the floor insulation

Thus, it turns out that the steam wooden floor of the first floor to be performed after installation of a heat insulating material, and protection against moisture in the air for intermediate floors or attic is placed from below.

Insulation film interfloor and attic floor insulation is placed below

If you put the right stuff, you can not worry about the safety of structures.

Vapor barrier when attaching to the design of the ceiling or the floor in the house has not only the above mentioned purpose. Laying material suggests the following:

  • ceiling construction, in addition to protection against moisture, receiving patronage from most types of organic damage (mold, rot, fungus), which requires warm and humid conditions for reproduction;
  • laying a film in the overlap basement or attic interfloor constructions can significantly increase the service time of wood, to reduce the frequency of repairs (substantial savings operation);
  • Modern materials are able to create an additional ceiling of protection in case of fire and to increase its fire resistance, it is important to ensure that people in the house had to be evacuated;
  • packing material, which has good durability, - a single event, often replacing a vapor barrier is not required, the layer does not fail.

Hydro capable of securely eliminate the many problems with floors and roof. The choice of material in a private house depends on the financial possibilities and wishes of the future owner. Earlier, as Hydro, almost everywhere used plastic film, but it is not able to fully perform both functions during installation in the ceiling.

The polyethylene film can not simultaneously act as Hydro

Better to prefer a more modern materials, which ensure high quality protection of the ceiling and floor of the house. There are several forms of material production. The market offers the following types of coating mastics for construction:

  • cold asphalt;
  • hot bitumen;
  • PVC;
  • Ling-sulfonate based on bitumen;
  • rubber;
  • kukersolnye bitumen.

Processing in the building ceiling such materials is complicated by the fact that the overlap Hydro applied to a horizontal surface located above human growth. The worker will have to reside with a raised head. These working conditions substantially reduce the quality. recommended to consider this option to ensure reliable protection as the vapor barrier membrane (not to be confused with parodiffuzionnymi that serve as the seal section and release water vapor outside).

To modern membrane to protect the ceiling and floors in the house are the following types of materials:

  • Membranes with a variable capacity for vapor transmission. They can work to prevent the passage of moist air in both directions. Such Hydro floors will not bother with changing humidity conditions in the room, the film will be able to adjust to his own.

Adaptive film has a variable capacity for vapor transmission

  • The membranes with limited water vapor permeability. Their ability to remove moisture is strictly regulated and depends on the choice of material. They are set to conclude excess moisture from the volume of the space.

    Film Limited vapor permeability suitable for homes with non-permanent residence

  • Membrane with aluminum foil. The use of such materials will ensure a high degree of protection of load-bearing structures at home by a couple. Furthermore discharging moisture such Hydro allows retain heat inside the building. It is reflected from the surface of the foil and does not leave the volume of the room. Especially such a property important when repair and construction of baths, bathrooms and other rooms where the air is required to maintain an increased temperature.

    Heat-reflecting vapor barrier keeps the heat in the room

  • Features ceiling vapor barrier made of wood

    Installation of any material is quite simple. Because of the variety it is difficult to give one universal way. Most often, the manufacturer specifies the exact recommendations for the use of its material and the requirements for carrying out the works.

    Manufacturers often produce both hydro and parozaschitu. It is best to isolate the insulation and wood from moisture pick two films (vapor barrier and waterproof) from one company. This will allow to speak about the reliability of the protection and observance of technology.

    Driving the ceiling vapor barrier

    For how to attach the indoor material (and it always is mounted on the inside, protecting the elements from the warm room air, no matter what structure is subjected to finishing) can be reduced following recommendations handyman:

    • Do not forget about the many layers of the ceiling design. If the layers list, fixed inside the bottom up, we get the following sequence: lining, vapor barrier, overlapping the frame, insulation, waterproofing, floor construction. This procedure is suitable for intercommunication and attic floors. When laying the material from the attic location vapor barrier, insulation and seal section does not vary with respect to each other.
    • required surface priming compositions comprising an antiseptic component Before packing material.
    • Attach subsequent layers is possible only after the complete drying of the primer.
    • Vapor must go to the wall not less than 20 cm. It is also necessary to provide overlapping webs of material (at least 10 cm) and sizing the abutment and attaching to the frame with tape.
    • Vapor barrier on top of the assembled crate, which will be fixed headlining. Lathing can be either wooden or metal profile.

    Vapor barrier for ceiling hardwood floor: technological rules device

    In order to reduce heat loss through the building constructions, equip them a layer of insulation. Almost all kinds of insulation needed to protect against the penetration of atmospheric water vapor on the outside and inside home. By the device of vapor barrier should not be treated with disdain, because this insulation system component plays a lesser role than the waterproofing. It is particularly important to know how to steam, constructed for the ceiling in a wooden ceiling, as used extremely sensitive to excess water materials in its construction.

    The role of a vapor barrier in the construction of

    On structures inside the steam flows constantly exposed allocated when absolutely necessary household work, breathing households, receiving hygiene and so on. The penetration of water suspended in the air in the building envelope and building systems for insulating a negative impact on their technical and operational characteristics.

    On moist surfaces in the steam brisk pace settled colonies of fungi, with amazing speed resulting in unsuitability of almost all kinds of materials. Rot and broken wooden elements. Soaked insulation loses about half of insulating qualities as contained therein water substantially increases the thermal conductivity.

    Saturated suspended in water it always directs warm air where less pressure and moisture content. In our latitudes, the most of the parameters of temperature and humidity inside the buildings is much higher than abroad. This feature explains the direction of movement comprising pairs of air mass moving from the premises to the external environment.

    The predominant amount of fumes according to its own physical nature goes up to "go" to the atmosphere through the enclosing system. Most actively comprising pairs airflows "attack" ceiling joists, the upper segment of the walls and roof construction. They are something and need to vigorously defend against the ingress of water present in the air.

    The flow process air mass in the zone with a lower pressure and water saturation is called diffusion. There is nothing particularly wrong if during the construction of building constructions were not allowed errors. Moist air just does not pass into the interior of the heat-insulating pan or move out without damaging the structure.

    However, if during the construction of houses with insulation systems were violations of technological regulations, the water will be retained in the building envelopes. At best, the result will be increased heat loss, a sense of eternal cold and damp. In the worst - coming destruction of or damage to structures dictating mandatory overhaul.

    Protection of garret overlapping pair

    Function isolating film in the heat insulation cake is to prevent the penetration of water suspended in the air in the building construction. So, it is a vapor barrier must stop evaporation to or do not skip or reduce to the minimum values ​​of that which managed to get through it.

    We have found that in our regions often pairs with the air flow just moves from the outside of buildings. Only in the summer heat can reverse current. The first way to humid air should be a vapor barrier. Therefore, it is laid on the part of the exploited space in front insulation.

    The device is a vapor barrier on the soffit held if not intended to heat the attic. In this case, the attic space makes no sense at all to insulate, because it will not operate at all or will be used as a cold storage.

    True to protect the sheathing materials stingrays and rafter framework still need. From external influences is set waterproofing of condensation occurring due to the temperature differences inside and outside the structure, the ventilation system is arranged.

    According to the requirements of building regulations in the winter the temperature in the cold part of the attic should not exceed it on the street for more than 5 - 6º C. Marked JV 17.13330.2011 rules state that to equalize the temperature and humidity inside and outside the parameters of the attic is necessary to arrange the natural type of ventilation.

    This means that the roof structure is required to provide the air holes, skylights, aerators and others. The total area of ​​the vents, irrespective of their type and destination, should average 1/300 of the overlapping area or the horizontal projection of the roof. Described the measures is sufficient to maintain the balance of temperature and humidity specified construction standards.

    Specificity vapor barrier device

    As a vapor barrier protection attic floor uses materials with lower vapor permeability. This characterization indicates the ability to carry out the evaporation in a specific volume per unit area is denoted in mg / m² per day. It to a greater or lesser extent, have all gates.

    Despite the ability of wood to pass freely evaporate excess moisture on it is undesirable. Natural organic matter is unstable in the linear dimensions, it expands when wet. Naturally, this property is usually taken into account by designers, but unwanted advances of wooden structural elements do not go for them, moreover, often lead to decay.

    For normal operation of the ceiling located under the cold loft must correctly position the components according to their ability to pass the humidified air. The first component should be positioned as low as possible to carry out the steam, then with water vapor permeability, greater than the previous.

    Therefore, to protect the device from the pair of materials chosen mainly from the ability to pass pairs, close to zero or equal fractions of unity. Note that it may be several dozen, but is bound to be smaller than that of the insulation. Even taking into account the fact that wood is quite high ability to conduct vapor material to protect the device must not pass from it more than a few tens of mg / m² per day vapors.

    Driving insulated wooden floors, when viewed from the side to equip the premises, it should look like this:

    • Parozolyatsiya. Layer made of glassine, diffusion membrane, a polypropylene or polyethylene film. During construction, the top is laid on the floor. When repairing the ceiling set by the rooms, glued or fastened strips.
    • Thermal insulation. Layer performed Sediment, roll or slab types of heaters. Most often fills the space between the joists, sometimes stacked on top of the overlap on the rough flooring or screed. If it is not supposed to operate the attic, the insulation is laid without waterproofing and windbreaks.
    • Waterproofing. Layer was performed from a diffusion membrane or perforated polyethylene. Arranged only in case of operation loft placed underneath the flooring or floor covering.

    If the use of the attic is not planned, the waterproofing device on top of the insulation layer is not necessary. She transferred to the stingrays, which carries out work to protect the entire roofing system from atmospheric water. Overcoating insulation layer also does not need to wind protection, because by heat blowing out of his column protects the cladding itself.

    For maintenance roofing system within unexploited attic stairs are installed. They are placed directly on logs, if applicable slab or roll material. Traps set in the legs, if insulation formed by filling the expanded clay. Freely laid on the attic insulation to periodically "loosen" to caking of not decreased insulation properties.

    Technological details laying vapor barrier

    Vapor barrier under the insulation layer is placed in a tray shape with the setting of original skirting the walls. Those. so that this barrier was not only between the ceiling and the insulation, but also between the insulation and in contact with him part of the walls. Cover protective material is required each joist or wall panels.

    Laying vapor barrier material overlap is made:

    • On rounding each beam. "Without interference" material is laid lengthwise stripes perpendicular to the girders with a recess in mezhdubalochnoe space. Cutting a vapor barrier made with this in mind. If the length of one strip is not enough, it is performed gluing panels.
    • On turning around, pans inside each compartment-shield cap. The material is cut into pieces corresponding to the size of the shield and the height of its walls.
    • With laying on top of the rough flooring or fastening on the inner side to the ceiling, if the insulation is carried out to improve the insulating properties of the structure during repairs.

    Regardless of overlap circuit device for steam under attic ceiling in a wooden house should form a continuous carpet, not water permeable or conductive in its minimum volume. For this purpose the web material webs stacked overlapping with said producer whose size is indicated in the instruction, and are glued to each druzhkoj single- or double-sided adhesive tape.

    Roll out overlapping vapor barrier material should be as it was wound up by the manufacturer. Nothing to flip, and do not need to rewind. In order not to confuse the part of laying the manufacturer indicated in contact with the side overlap.

    How to choose the right material

    Vapor barrier is important not only competently put, but also to choose the most suitable material for its devices. Tandem steam - heater is required to run perfectly, preventing the possibility of wet thermal insulation cake.

    The oldest one pair protection device is a fatty clay, which was treated with an overlap ceiling below or above. Together with clay used dry top soil, which prevents penetration of hot air in the heat and cold in the cold. Instead fine ground peat, shavings, saw dust, dry leaves and the like may be used.

    Instead of outdated versions of the insulating material is now used specifically designed for protection against heat and steam leaks. Their styling is made significantly easier and significantly at higher rates. However, the insulating properties are inferior to the old-fashioned techniques.

    For device protection vapor barrier attic floor is now used:

    • glassine. Budget embodiment with vapor permeability of about 70 mg / m² per day. It used mainly in domestic buildings which do not involve increasing the level of humidity above the standard values.
    • The films of polypropylene and polyethylene. Permeability is calculated units, about 3 - 5 mg / m² per day. Most of them are reinforced materials that are resistant to thermal shock, mechanical stress and UV irradiation. Suitable for decorating wooden beams under the filling insulation.
    • Vapor membrane foil envelope. Permeability is an average of 0.04 - 2.55 mg / m². Used for decorating rooms with high humid and unstable thermal background: saunas, steam rooms Russian baths, swimming pools, bathrooms with toilets.
    • Anti-condensation diffusion membrane. Their ability to pass pairs varies in a broad range of 3 to 15, or several tens of mg / m². This is the latest multi-purpose varieties. In operated attic ceiling can be mounted with the lower and upper side of insulation.

    Anti-condensation varieties are available in the form of bilateral polymeric membrane. On the one hand, to be deployed to the couple, they are rough, thereby avoiding the formation of dew. The opposite side is smooth, it prevents the penetration of moisture from the outside.

    Videos about the rules of a vapor barrier devices

    EXAMPLE stacking vapor barrier web material on a ceiling:

    Movie about the specifics of laying isolating film:

    As distinguished from a waterproofing vapor barrier material options:

    Arranged in accordance with the technological requirements of vapor barrier eliminates the premature wear and destruction of building structures, eliminate costly leaks heat, eliminate the possibility of moisture in a country house.

    It is also need to be sure to build so layered "cake" for steam and thermal insulation of the ceiling of a small private house of such a huge number of different materials? Our ancestors (my grandfather did that) maximum ceiling filled by the attic dry sawdust or sand. Nothing more is done, and all the insulating properties of the roof are at the highest level!

    Last year did a vapor barrier in the country, using a polypropylene film with anti-condensation coating. The coating protects against condensation, the main rule here - a smooth surface put up a rough-down, expanding it to the side rooms. Overlap by, prokleivaya-sided self-adhesive, take 10 cm wide. To crate crepe staple gun. At the end of the winter, I can say that getting wet with freezing was not, no fungus.

    I work with the ceiling first year. When performing a vapor barrier in the ceiling hardwood floor for the first time, I made a couple of mistakes. Firstly, not kept the insulation material, and secondly, do not know what you need to do a small ventilation fence, well, I forget about the problem of vapor barrier integrity. Like all the little things, but in the end all the work had to be redone.

    Myself work in a company for the construction of houses, villas, baths, etc. But recently I decided to build his house. I do everything as it should, according to the rules, but when it came to the roof, I began to doubt the issue of insulation. Long sought as well to do, and in this article to discover so many new things. I used for this polypropylene film. Everything is perfect, the roof is ready for a year the house was built. Very useful article.

    I was faced with the need to make a vapor barrier where built bath. It would be possible to supplement the above material (specifically about bath) information about the individual materials for the barrier device from the steam. Their peculiarity is that on the front side are covered with foil cover, which often leads to a very good energy efficiency. This is due to the fact that the insulation with aluminum foil at competent installation works as teploreflektor, ie It reflects the heat wave in the opposite direction. Delicate moment, when you do one thing and then you will know that it affects a lot of different factors.

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