Filling the attic with foam concrete. Plate materials for flat roof insulation. Shrinkage during operation
The principal thermal insulation device for modern flat roofs.
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| Figure: 2. Appearance traditional modern roofing. 2 - reinforcing mesh; 3 - cement screed; 5 - heat-insulating layer of mineral wool or expanded polystyrene. |
Figure: 3. Flat roof with monolithic foam concrete. 1 - Waterproofing carpet; 2 - Screed made of structural foam concrete D600; 3 - Insulating layer and slopes to the drain funnel made of extra lightweight foam concrete D200. |
Table 1. Comparative thesis substantiation of the choice of a flat roof structure.
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Thermal insulation roofing materials |
Mineral wool |
Styrofoam |
Monolithic foam concrete |
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Type of material |
Mineral fiber with organic binder (phenol-formaldehyde resins) |
Organic |
Inorganic |
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Shrinkage during operation |
The geometrical dimensions of the slabs decrease, the roof breaks down. |
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Heating behavior |
Thermal destruction of organic binder |
Thermal destruction |
Operating temperature up to 400 degrees. |
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Compressive strength |
There is no compressive strength, there is a load at 10% deformation. Such an indicator does not correspond to real work. |
Sufficient strength - from 0.3 MPa (10 times higher than that of mineral wool and foam.) |
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Water absorption |
Higher than Styrofoam, but significantly lower than Watt. Only the outer layer of foam concrete up to 10 mm thick gets wet. Foam concrete "self-dries" over time due to the hydration of the cement. |
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Flammability |
Burning polymer binder mineral wool |
Combustible, burns with the release of toxic gases |
Absolutely non-flammable. |
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Roofing cake construction |
Heterogeneous |
The roof structure is homogeneous: thermal insulation, slopes and screed are made of the same material. |
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The laborious process of cutting slabs of material at the junctions to parapets, communications, etc. Cold bridges are possible at the joints of the slabs. |
Easy filling of any reliefs. There are no slab joints. |
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Durability of the roof |
In the process of operation, destruction of styrene foam and phenol-formaldehyde binder of mineral wool is taking place. |
During operation, foam concrete increases its strength. |
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High considering materials for creating slopes and screed |
Low, so all roof elements are made of lightweight foam concrete |
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Roofing carpet defects |
Overpressure is created under the waterproofing carpet, creating air bubbles. |
Excessive pressure is distributed inside the pore space of foam concrete, without the formation of bubbles. |
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Shrinkage during operation.
Foam plastics and mineral wool during operation, especially under load from the overlying layers of the roof, decrease in size. At the same time, the roofing "pie" slides down, tearing off the waterproofing from the parapets.
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| Figure: 4. Traditional roofing with mineral wool or expanded polystyrene insulation within 2 years after installation. 1 - waterproofing carpet; 2 - reinforcing mesh; 3 - cement screed; 4 - expanded clay gravel to create slopes to the spillway; 5 - heat-insulating layer of mineral wool or expanded polystyrene. |
Fig. 5. The same roof after 3-5 years of operation. Damage to the waterproofing at the junction with the parapet due to subsidence of the thermal insulation layer is shown. 1 - a layer of mineral wool or expanded polystyrene after shrinkage during operation for 1-3 years. |
In addition, due to the unevenness of the snow load, mechanical loads (people walk along the roofs along certain paths, and not evenly over the entire roof), due to the heterogeneity of the insulation material itself and the uneven thickness of mortar screeds in traditional roofs, depressions are formed in the planes of the roof, the so-called lenses where water collects. The roof becomes "bumpy" over time. In places where "lenses" are formed, the screed is usually broken, and at the slightest violation of the tightness of the upper layer of the roofing carpet, water from the lenses enters the roof.
In foam concrete roofs, the formation of "lenses" and recesses is impossible even if people are constantly on the roof, since foam concrete is a tough and durable material.
Compressive strength
Mineral wool and foam, including extrusion, do not have compressive strength. They are characterized by strain load values. This indicator gives us the strength value, which shows the material compacted by 10%. Those. uncompressed neither mineral woolnor the foams are able to resist the load.
The strength at 10% deformation of mineral wool with a density of 100-150 kg / m 3 and extrusion foam does not exceed 300 kPa (0.3 MPa). The strength of foam concrete with a density of 200 kg / m 3 starts from 0.3 MPa (300 kPa). Those. Foam concrete can withstand the same load as rock wool or extrusion foam when squeezed by 10%. But under such a load, foam concrete does NOT deform.
Water absorption of foam concrete.
Most of the thermal insulation materials used on roofs have a high water absorption. 60% thermal insulation roofing materials submitted different kinds mineral wool, the real water absorption of which is up to 70% by volume (1500% by weight). This figure exceeds the water absorption of foam concrete by one, or even two orders of magnitude.
State standards do not standardize the water absorption of mineral wool, since it is understood that this material should work only in conditions of a complete lack of opportunities to absorb water. Naturally, in practice, in a real construction site, this is impossible - both during the period of work and during operation. Also, practice shows that it is practically impossible to dry the frozen mineral wool, especially in the conditions of the lower layer of the roofing cake, which cannot be ventilated.
Slightly better is the situation with the absorption of water in polymeric foamed plastics, including the maximum quality of extruded polystyrene foam attainable today. Despite the low "paper figures" for water absorption by foams, we forget that on top of the foam there is a material for creating roof slopes. In most cases, this is the cheapest bulk material - expanded clay, on top of which a cement screed is made, or mounted sheet materials (asbestos-cement sheet, cement-particle board, etc.) By the way, exactly the same roof structure is made for mineral wool slabs. But in this case it is not so important, due to the already huge water absorption of mineral wool.
A layer of loose expanded clay has a thickness of 50 to 400 mm and is a cavity under the screed that can absorb 25 to 200 liters of water per square meter! Moreover, in the event of a leak through the screed, the leak into the building may be tens of meters away from it, finding a free path in the expanded clay layer. It is extremely difficult to detect damage to the roof waterproofing. (see figure 5.)
A roof with monolithic foam concrete behaves quite differently. Especially lightweight foam concrete is completely closed from water leaks by a layer of structural "screed" foam concrete, which absorbs water to a depth of about 10 mm. In the event of damage to the waterproofing, the foam concrete massif is able to stop the movement of moisture deep into the roof. It should also be noted the remarkable fact of self-drying of foam concrete - water that got inside the foam concrete mass is used by the cement matrix of the material to continue the hydration reactions that go with the chemical binding of free moisture. The hydration reaction compacts the structure of the foam concrete and stops the further movement of moisture. In case of serious damage to the roofing carpet, the roof is sealed locally - only in the place of damage, and not under the entire surface of the screed, as when using expanded clay to create slopes over foam and mineral wool.
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| Figure: 5. Leakage of water into a traditional roof. Through the damaged waterproofing, water fills a layer of expanded clay gravel and the voids under the layer of thermal insulation. Then, through discontinuities in the base of the roof, water enters the room. 1 - damage to the waterproofing carpet layer; 2 - a layer of water above the thermal insulation; 3-layer of water under the thermal insulation. |
Figure: 6. Water leakage in the foam concrete roof through the waterproofing is localized at the point of penetration. 1 - waterproofing layer; |
Flammability
Foam plastics burn beautifully - thanks to numerous fires, citizens who are most far from the construction industry know about it. Combustion of foams is accompanied by the release of poisonous gases, which, incidentally, occurs not only during combustion, but also with the smallest increase in temperature. One drop of welding when performing lightning protection on the roof, and a fire is more than likely, even during the construction of the building.
Mineral wool does not burn, but smolders. Smoldering is provided by a phenol-formaldehyde binder. Naturally, during combustion, nothing good is released into the atmosphere either.
Foam concrete is foamed stone and stones do not burn. On the contrary, aerated concrete can be used as a fire protection, for example for metal structures.
Roofing cake construction.
The construction of a modern flat roof consists of several elements. As we have already described in the section "water absorption" there are three layers:
Thermal insulation layer (mineral wool or foam);
The layer that forms the slopes of the roof to the weir funnels (expanded clay gravel);
Screed (cement-sand mortar with reinforcing mesh or sheet materials).
In the case of using monolithic foam concrete, the thermal insulation layer and the slope-forming layer are made of monolithic especially lightweight foam concrete with a density of 200 kg / m 3, which significantly increases the thermal protection of the roof. The screed on top of this layer is also made of foam concrete, only more durable and dense, with a density of 500 kg / m 3.
Naturally, homogeneous materials, due to their affinity, work better both in the heat engineering and in the structural sense. There are no sinkholes, delamination, bubbles and other defects on the roof that are so common for traditional roofs.
Features of the roof device
When performing a layer of thermal insulation from a plate material, difficulties always arise when performing thermal insulation of complex architectural elements on the roof, in places where communications pass (electrical wiring, ventilation, sewerage, etc.), in places for mounting equipment of buildings on the roof (air conditioners, etc.). Precise cutting of slabs is laborious and practically difficult to control. As a rule, all these places in the future will have problems with freezing and getting wet.
Monolithic foam concrete fills all the voids of the roof, forming a continuous warm shell of the building, monolithing the roof. The above problems with traditional roofing do not arise by definition.
Durability of the roof
Both expanded polystyrene and mineral wool (containing a polymer binder), like any other polymer material during operation it is subject to destruction. Especially in extreme roofing conditions associated with overheating and often moisture.
Hundreds of books and articles tell us that any polymer has a limited lifespan. This is especially true for thermal insulation polymers.
Foam concrete, like any concrete, only gains strength during operation. Our own research shows that foam concrete having a strength of 0.3 MPa at the age of 28 days after a year of operation will harden to 0.5 - 0.7 MPa. Recall that hardening occurs when free moisture is bound in the material, due to which self-drying of the foam concrete occurs, even in sealed conditions.
Roofs made of monolithic foam concrete are lighter than traditional roofs, which in some cases makes their construction an uncontested opportunity, especially when carrying out reconstruction work.
Table 2. The weight of a traditional roof, insulated with expanded polystyrene.
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Material |
Thickness, mm |
Density, kg / m 3 |
Weight kg / m 2 |
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Roof insulation |
Expanded polystyrene |
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Roof slopes |
Expanded clay |
(Average value from 50 to 350 mm) * |
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Screed for gluing roll carpet |
Cement-sand with reinforcing mesh |
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Total weight of 1 m 2 roof |
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Tab. 3. The weight of the roof is insulated with monolithic foam concrete.
Please note that monolithic foam concrete allows slopes with a lower degree than traditional roofs with expanded clay screed.
Defects in the roofing carpet.
The most common defect in traditional roofing is the presence of blisters on the roof carpet when it is heated in summer period... This happens when water vapor is heated under the waterproofing layer. Foam roofs are practically devoid of defects of this type, since the excess pressure of water vapor is evenly distributed in the pore space of the foam concrete. The mechanism of this phenomenon is discussed in more detail in our article "Buffer foam concrete screeds during the reconstruction of flat roofs" in the journal " Construction Materials»For November 2012.
Appendix 1. Work in winter conditions
The main disadvantage of roofs with monolithic foam concrete is limited opportunities by winter works... Industrial production of foam concrete is possible at positive temperatures, for a combination of reasons - the main of which is the freezing of the water supply hoses. In addition, we fundamentally do not recommend the production of roofing works in winter conditions, also for a number of reasons:
- Excessive gas consumption for ice and snow removal;
- Wage overexpenditure on ice and snow removal;
- Inability to control the absence of snow and ice inside roof structures;
- Excessive gas consumption for the waterproofing layer sticker;
- Frost damage to materials and equipment.
At the same time, it should be noted that the technology allows work at temperatures up to -7 degrees.
Appendix 2. Polystyrene concrete as insulation.
The use of polystyrene concrete on roofs is most often unjustified for economic reasons, since expanded polystyrene granules, which are the filler, are often unjustifiably expensive.
At the same time, there are additional negative circumstances that must be taken into account when working with this material. Polystyrene granules decrease in size during operation. As a result, in a year or two, instead of polystyrene concrete, we get large-pore concrete with expanded polystyrene chips. As a result, the strength and thermal conductivity of polystyrene concrete deteriorate sharply. The photos below show a 5 year old polystyrene block.
About what layers a flat roof consists of and why it is necessary to "wade" through them in order to replace the insulation, it is described in the article about the layers of a soft roof.
If a new flat roof is being installed, then the thermal insulation is laid on top of the vapor barrier. This is, in principle, relatively easy. It is always easier to carry out insulation work on a new roof than to do the same, but when repairing a flat roof.
During repairs, in order to get to the insulation (wet and / or decayed), it will be necessary to dismantle the old waterproofing coating (and it happens that it is filled with pebbles or sand, or even asphalt is laid on it), a cement-sand screed (for sloping). And only then will the thermal insulation appear, which should be replaced using various materials and methods of insulation.
This, most likely, will be expanded polystyrene or mineral wool or stone wool - these are the materials that are performed in 90% of cases flat roof insulation.
Few of the builders / contractors / operating organizations will deal with the dismantling of the entire roof - too expensive and time-consuming. As a rule, this is not done at all, but simply rolled over with a new layer of waterproofing and, well, if aerators are installed.
Nevertheless, let us assume that true professionals (not necessarily “true Aryans”) came to the roof and found several areas where you put your foot and feel that the foundation is unsteady; below is water. Or, if you step, then a crunch is heard under your feet - it means the screed is cracked. In general, the entire roof is not dismantled, but 5-6 of the most problematic areas are opened and all decayed and rotted layers are removed - to the floor slab or to the vapor barrier, if it is intact.
And then it is necessary to restore the roofing pie in these areas, incl. to do roof insulation... This page of the website www.site describes various materials and methods of insulation:
- polyurethane foam,
- foam concrete,
- polystyrene concrete,
- extruded polystyrene foam,
- stone wool,
- foam glass.
All these materials for insulation can be used both for constructing a new roof and for repairs: Obviously, some methods of insulating a flat roof, due to technological features, no one will use 5-6 sections of 10 squares each when repairing.
Some materials and methods of insulation can be combined, for example, polyurethane foam + rockwool or polyurethane foam + foam glass. This will be especially convenient and reasonable when repairing a flat roof, when you need to restore insulation in an area of \u200b\u200barbitrary geometry. But for this, the work manufacturer must have a PPU installation, preferably high pressurebut a low one will do. You can turn out and use stand-alone foam kits FoamKit - but remember that the density of such foam is low and there are more open pores. However, if it is necessary to seal around the perimeter of the laid sheets, then it will do.
So, below we will consider various ways to insulate a flat roof. We will not make the difference between a new roof and its repair. Read below for an overview of the different materials that can be applied to thermal insulation of a flat roof... What and where to use - you decide for yourself, focusing on the place and based on your capabilities.
Roof insulation by spraying and pouring
The most technologically advanced methods of insulation, according to the site, are those that allow you to lay thermal insulation on an area of \u200b\u200barbitrary geometry, a large surface with the involvement of a minimum number of people, and quickly, efficiently, reliably, conveniently ... Does anyone think otherwise? In general, it was a rhetorical question.
So, under the above criteria fall materials for insulation, which are obtained directly on the roof, on an insulated surface, by pouring or spraying ingredients. Among those known to the SD Department are polyurethane foam, foam concrete and polystyrene concrete. I note right away that there are other materials that can be poured and sprayed, for example, ecowool, but, in my opinion, it is wrong to use them for roof insulation. Therefore, they are not mentioned below.
Let's start with the "king" of thermal insulation, with material No. 1 for roof insulation... It - .
Polyurethane foam for flat roof insulation
Polyurethane foam is convenient for its manufacturability. PPU is sprayed with special equipment, the liquid falling on the surface foams, increases in volume, a layer of insulation is formed. The photo below shows the moment of repair of a flat roof. Immediately, I note that here they went along the path of simplifying and accelerating the technology, namely: no one removed the old roof covering (and even what was under the roll - and even more so). We limited ourselves to cutting out and draining obvious bubbles.
Polyurethane foam should not be left "naked" in the sun. Ultraviolet light will make it fragile in a couple of months. Therefore, after the material will be painted - protected.
In general, PU foam is not very hygroscopic. Therefore, it can serve as an additional waterproofing. But nevertheless, it should be remembered that this, first of all, is a material for insulating a flat roof, and its waterproofing properties are secondary. So leave it like topcoat the roof, even if painted from ultraviolet radiation, is - in my opinion - not enough. Depending on the impact external environment, operating conditions, etc., - such a roof will last for five years. Then - renovation again. But, what pleases, it will have to be repaired in separate local areas. And PPU - very maintainable: cut out, cut down the crumbling area and dust it again.
In general, the roof, which is in the photo, after PPU insulation, will be dusty with paint and waterproofing material. And, to be honest, it won't be liquid rubber. In general, the application of liquid rubber over polyurethane foam is a separate topic for conversation. I will only note that if you cover PPU liquid rubber (subject to a number of requirements), then the polyurethane foam must be obtained in a high-pressure installation. If the flat roof is insulated with polyurethane foam sprayed by the installation low pressure, then a screed should be made over the polyurethane foam and only then - sprayed with liquid rubber.
Some people argue that polyurethane foam is flammable, but this is not entirely true. The higher the density of polyurethane foam, and for roofs a density of 60-80 kg / m3 is required, the worse it burns. More precisely, it does not burn at all, but melts and then only when exposed to fire. If you remove the flame source, the PPU dies out. However, if you arrange a screed over the polyurethane foam, then the "fire" question disappears completely.
By the way, an experienced operator is able to make or "correct" the slope with polyurethane foam. It remains only to arrange a tie from above, but cement mortar you will need much less, because it is the PPU that will form the slopes of the roof. The plus is that you get a "sickly" thickness of the insulation, but the slope will be many times easier than if it is done all with concrete. Minus - the price of the issue will increase, because a cube of polyurethane foam with a density of 60 is several times more expensive than a cube of cement-sand mortar.
It is the price of polyurethane foam that, as a rule, is what really slows down the massive use of polyurethane foam as insulation on flat roofs.
Now let's look at another technological material for roof insulation, the cost of which is lower than that of polyurethane foam. This is foam concrete.
Foam concrete for flat roof insulation
Most people know that blocks for walls and partitions are made from this material, but foam concrete can also be poured right on the site. The coefficient of thermal conductivity of foam concrete is higher than that of polyurethane foam, therefore, it needs more in thickness than polyurethane foam, and accordingly, the mass of foam concrete insulation will be heavier. But foam concrete is still much lighter and warmer than ordinary mortar.
Therefore, it is quite reasonable, for example, to install a special formwork and pour a layer of lightweight foam concrete (density 250 kg / m3) over the vapor barrier, thus realizing both the insulation and the sloping of the roof. Then, on top of lightweight foam concrete, arrange a strong screed.
The advantage of foam concrete for flat roof insulation is that it is cheap and technologically advanced.
The downside is that according to modern energy saving requirements, a layer of insulation - foam concrete may take up to 1 meter. And this, whatever one may say, is the load on the roof. There was a time, at the beginning of the two thousandth, then lightweight foam concrete was very widely used for insulation and roof sloping. St. Petersburg was especially distinguished in this. But then, as a rule, the layer of foam concrete was made from 270 to 350 mm.
As of the summer of 2012, the use of foam concrete, both for thermal insulation of flat roofs and for solving other problems of insulation, has decreased in Russia as a whole.
If a specialist "foam concrete worker" reads this article someday, and refutes the above, on the site, you can post an overview of the real state of affairs with foam concrete, as material for insulation.
Next interesting method of insulation - This is the filling of polystyrene concrete for thermal insulation of a flat roof.
Polystyrene concrete for soft roof insulation
This is a kind of hybrid of foam concrete and expanded polystyrene. The photo below shows the process of pouring polystyrene concrete.
Polystyrene concrete is good for insulating a flat roof, but it is obvious that the use of this material, like foam concrete, for local repair is almost impossible. More precisely, perhaps, but it is so difficult that no one is doing this - it is much easier to use plate materials for insulation.
Plate materials for thermal insulation of flat roofs
The three materials that were described above, if you have a desire to use them for flat roof insulation, will require special equipment.
Moreover, in the case of foam concrete and polystyrene concrete, which is very bulky, we add to this mountains of sand and cement or many runs of concrete trucks, so noise, din, dirt, etc. attributes are guaranteed. Only PPU is an exception: a small installation + a compressor and 4 barrels (ton) of liquid turn into 15-20 cubic meters of insulation already on the roof.
And, nevertheless, often those who perform flat roof insulation have neither the equipment for spraying PUF nor the desire to apply these technologies. 95% of contractors prefer to use "slab" materials. Firstly, it is often cheaper, and secondly, the only thing that is needed for laying them is "human hands". For many it is also important when "Get Smart" is not needed (the movie was so funny - did you watch it?).
So, all that is needed is to lay the slab insulation, and along them - to perform the slope using a cement-sand mortar, and then - waterproofing with liquid rubber.
This group includes: polystyrene, mineral wool, stone wool, foam glass
Expanded polystyrene for roof insulation
Now, when we speak of expanded polystyrene, we understand extruded expanded polystyrene. I believe that very few people are already using conventional PSBS for thermal insulation of building objects. They don't seem to sell it anymore. Although - Russia is big, maybe where it is still produced and continues to be laid.
Now in Russia there are many tens (and maybe more than a hundred) of extruded polystyrene foam producers. Describing what it is and how it is done is off-topic here. I would like to note that today this is the most widespread method and material for insulating a flat roof. The process is to lay the sheets tightly over the entire surface, possibly gluing between the resin. It looks like the photo below.
Orange extruded polystyrene foam boards indicate that possibly foam is used. Previously, only this material was of this color. But today there are many manufacturers. Therefore, the color differentiation of extruded polystyrene foam no longer makes it possible to determine belonging to a particular brand, in contrast to the color differentiation of pants on the planet Plyuk, in relation to the social status of chatlan and patsakov.
Roof insulation with stone wool
Flat roof insulation method stone wool rockwool is identical to the previous one: we open the pack and lay the sheets, adjusting them to each other. Plates are usually two-density: on one side, the density is higher than on the other. The side of increased density is usually marked with a black stripe. This side of the rockwool slabs are stacked up.
The photo shows the classic flat roof insulation. It can be seen that the vapor barrier has been laid. Slabs of stone wool are laid on top.
Thermal insulation of a flat roof with foam glass
Foam glass is, on the one hand, relatively new material, but on the other hand - known for a long time. Only it was not used. I suppose they did not do this in the Union, so as not to waste raw materials - breaking glass, bottles.
In general, in my subjective opinion, this is better than the previous 2 panel materials.
Here's a quick overview of how to insulate a flat roof various materials completed.
After the insulation or repair of the insulation has been completed, the next step is ventilation and deflection, after which it will be possible to proceed with waterproofing with liquid rubber.
If you have any questions that have not been touched upon in this article about methods of insulating a flat roof or in other materials on the site regarding bitumen polymer emulsion or polyurethane foam, make a request through the form in the Contacts section.
When building and renovating a house, much attention is paid to roofs. They must maintain geometry, not sag under load. And also - to be safe, inexpensive, environmentally friendly, to keep warm at home. Similar requirements are imposed on insulation today. All of them are answered by a relatively new foam concrete for the market.
A smart choice
Roofs that have been insulated using familiar materials, for example, mineral wool or expanded clay concrete, can begin to "deteriorate" in a couple of years. The reason for this is the action of the ruthless summer sun. Under its influence, moisture begins to evaporate from the insulation (water, condensate, soaked in the material in the cold season). Due to the "vapors" under the waterproofing, excessive pressure is created, which causes the roof to flake off from the base.
Now foam concrete is often used as insulation on roofs. For our latitudes, this material is relatively new. Meanwhile, Germans and Italians equipped houses with a similar roof back in the fifties of the last century, and then the material was spread in other European countries.
Foam concrete is a concrete mix with the addition of foam produced by a foam generator or a baro installation. The cellular structure is obtained due to the precise distribution of air bubbles by weight.
Main characteristics
Foam concrete is suitable for roofing according to a number of parameters:
- Material geometry stability (rigidity). So, for example, because of the unequal mechanical load on the roof, the thickness of the screeds on the usual roofs, recesses are formed, called "lenses" (moisture accumulates in them, which penetrates into the roof itself, and over time, swellings appear on the surface). With the use of foam concrete, such troubles do not threaten.
- Constancy of technical parameters (uniformity). Traditional roofing shrinks under the influence of loads (snow cover, people on the roof). More precisely, this happens with a heater, the thermal insulation qualities of which decrease. The property of storing heat is also reduced when moisture enters the roof body. Such disadvantages are unusual for foam concrete.
- Long service life. Aerated concrete is a material that does not “age”, unlike traditional insulation materials. It does not rot, is not susceptible to fungus. In terms of strength, according to manufacturers, the material is second only to stone, but in terms of weight it is still foam. However, it should be remembered that longevity directly depends on compliance with the production technology, pouring conditions, hardening.
- Fire safety. Many traditional heaters burn and smolder under the influence of a direct flame or sparks. Foam concrete is not flammable, has I degree of fire resistance, which has been proven by appropriate tests.
Environmental friendliness is a plus for foam concrete. According to this indicator, it loses only to a tree (for the latter, the environmental friendliness coefficient is equal to one, a two is assigned). In addition, the material has good sound absorption characteristics, prevents heat loss (approximately 20-30% of the heat from the house can go through the roof).
Application area
Foam concrete supply to the roof through a hose. This insulation can be used on almost any roof - old, new, damaged, on the roof of an industrial enterprise or a residential building of various storeys. Due to the low weight of the material, it can be poured onto a light floor (wood, corrugated board). It is due to the relative "weightlessness" that experts recommend the use of foam concrete as thermal insulation during roof reconstruction, for old floors (depending on what load they can withstand). Foam concrete is also irreplaceable for arranging or rebuilding complex structures with abutments and several slopes. Another advantage of aerated concrete is that the surface for pouring it does not need to be specially leveled. The material will fill in all the roughness by itself.
With the use of foam concrete, labor costs for arranging roofs are reduced. It is supplied to the roof with hoses (maximum height - up to thirty meters) from a special installation located on the ground (productivity - up to 15 cubic meters per hour). At the same time, there is no need to step-by-step, in batches, to raise and distribute the thermal insulation, as is the case when using other materials. If it is required to carry out work at a mark higher than the declared thirty meters, compact equipment can be located closer to the place of work - only the raw material itself will need to be delivered there.
Note. The thickness of the layer is determined by means of a heat engineering calculation (on the Web you can find elementary formulas, tables with the thermal conductivity coefficients of certain materials, online calculators).
After the pouring is over, the foam concrete is allowed to harden. After 24 hours on a flat roof it is already allowed to walk on it. After a week - ten days (it depends on the outside temperature), it is treated with a primer - a primer, waterproofing is glued or fused, and a roofing carpet can be put on top (it can be anything, the choice, in particular, depends on the operational requirements, the wishes of the building owners, etc. similar).
Foam concrete has a wide range of applications in construction as a heat-insulating material, including for roof insulation, attic floors, technical rooms, attics, etc.
Thermal insulation foam concrete is one of the main materials used to insulate the roof. For thermal insulation of roofs and ceilings foam concrete, which includes foaming agent, cement, sand and concrete. In terms of durability, this material is not inferior to concrete, and in terms of weight it is similar to foam. Foam concrete provides tightness, retains heat, besides, it is non-toxic, vapor-permeable, fireproof.
Roof insulation foam concrete instead of using mineral wool boards or
expanded clay has already gained popularity in Russia. The use of expanded clay, for example, requires relatively high costs for transportation, lifting, laying, not to mention an increase in the load on the roof. To reduce the above costs, short-lived mineral wool slabs of poor quality are often used, while the criterion for their choice is only the price and the theoretical coefficient of thermal conductivity. And practice shows that in conditions of, for example, damp weather and real work on construction sites, moisture saturation of these plates occurs, for which an increase in humidity by 3-5% leads to a loss of 50% of heat protection. Problems with dew point and moisture condensation are also a problem with mineral wool structures.
When installing roofs and attics, monolithic heat-insulating foam concrete is poured. The resulting foam concrete layer provides reliable thermal protection and does not have dew point problems.
Attic rooms and technical floors are often prone to getting wet, which, in the absence of heating, requires moisture resistance and frost resistance from the insulation. Mineral wool or expanded clay, when wet, lose their insulating properties, that is, they cease to function as a heater. Alternating freezing-thawing leads to the rapid destruction of such a heater.
On the contrary, foam concrete for insulation has low water absorption. Even in the event of a leak, they retain their insulating properties. Besides, foam concrete has good thermal insulation properties, high noise insulation. Such material will serve for many years and will not lose its quality.
11 advantages of foam concrete for insulation
. Thermal insulation properties of roof insulation with foam concrete
are not inferior to classic insulation (mineral wool or expanded clay).
. Has the property of "breathing" , due to which a favorable microclimate is formed in the room, almost identical to the microclimate in wooden houses.
. Price material is lower than on classic insulation.
. Moisture resistance - minimum water consumption up to 15%, unlike other heaters (mineral wool up to 80%, expanded clay - up to 90%).
. Sustainability - the material does not contain harmful substances.
. High speed of work . Pouring is carried out from equipment directly at the construction site by supplying the mortar to the required place. High productivity and automation of the supply of insulating foam concrete can significantly increase the speed of work and reduce the number of workers involved in this work.
. Solidity . Foam concrete laid in an even continuous layer, without any seams or breaks, and can be poured in hard-to-reach places due to its fluidity, excluding the occurrence of any cavities or openings where it is not possible to lay classic insulation materials, which, as a rule, form either seams or cavities during laying, which allows you to observe the condition of the continuity of the thermal insulation coating
. Biostability and environmental safety - foam concrete not subject to decay and aging... The ecological purity of the raw materials used guarantees the complete safety of foam concrete products for humans.
. Shrinkage . Foam concrete for insulation practically does not shrink (up to 1-2 mm), which has an indisputable advantage in comparison with mineral wool and its analogues.
The cost of work on insulation with foam concrete
Thermal insulation
onny foam concrete
Strength class for compression - B1.5
Density (D) - 400 kg / m 3
Heat conductivespine - 0.13 W / mS
Sound absorption - 37 dBA
Frost resistance,cycles - 25
The cost of heat-insulating foam concrete (with material) D400 - from 3500 rubles / cubic meter (for volumes up to 50 cubic meters)
The cost of insulation with foam concrete (with material) D400 - negotiable (with volumes over 50 cubic meters).
TO final price of insulation with foam concrete from many moments such as cost of raw materials (cement, sand), scope of work, remoteness of the object , working conditions , pouring places , availability of communications etc.
Draw your attention to! There is a flexible system of discounts.
Foam concrete for insulation can be made to order of any density from D400 before D800.
Profi-Stroy company approaches each client individually and is ready to fulfill any of your orders for supply of heat-insulating foam concrete with the density you specified.
Order foam concrete for insulation at a good price in Profi-Stroy:
In our company you can order heat-insulating foam concrete of different density.
our company will fulfill your order for insulation with foam concrete in the shortest possible time.
. We carry out production and supply of foam concrete for insulation, produced using a unique technology,exclusively made of quality materials.
The work is carried out by highly qualified specialists.
In our work, only high-precision and technological equipment.
. We will do the work directly at your facilityat your appointed time.
6 reasons to choose the company Profi-Stroy
Quality , reliability and professionalism - this is what we guarantee you after execution works on insulation and sound insulation with heat-insulating foam concrete.
Your home or room will always be warm, comfortable and cozy!
Company Profi-Stroy
proposes to order thermal insulation
foam concrete
in Greater Sochi (from Adler to Tuapse), as well as across the territory of the Krasnodar Territory.
To order thermal insulation foam concrete
You can call us on tel.8-800-551-94-41
(
free in Russia
)
or by sending an application for, where indicate the object on which you plan to perform work pouring heat-insulating foam concrete
, parameters of the object (dimensions of the structure for pouring the monolith), the availability of communications, your contacts. Our experts will quickly calculate the price for work on heat-insulating foam concrete at your facility.
We are ready to make your life more relaxed!
