Building insulation by blowing (blow-in technology)
Fast growing prices of energy, including thermal energy, and very strict construction standards cause the growing interest in energy saving, and thus the technology and materials used for warming.
Keeping this in mind we present you technology which is new in Poland but widely used and recognized around the world – technology in the system blow-in (blowing) with loose insulating materials.
This method makes it possible for the warming element to reach every, even inaccessible space, creating a uniform tight insulating layer, which prevents the formation of so-called thermal bridges.
We inform that all thermal insulation materials used by our company with blowing technology obtained necessary certificates and approvals authorizing their usage in the Polish construction industry.
Opis technologii wdmuchiwania (blow-in)
Blowing of granulated mineral wool
The method of blowing is used to isolate the confined space, usually ventilated roofs, with insulating materials in the form of granules. In the conventional blowing technology vertical transport of material has been replaced by the administration of a granulate through flexible tubes by means of the unit and compressed air. In the void the operator deploys thermal insulation material to obtain the desired thickness, while controlling the spread of the insulating layer. This technology enables isolating the area of approx. 80 m2 / h.
Machinery and equipment for blowing insulation
For blowing insulation material we use units driven by electric motors with an output of 3-5 kW. The ability to feed the material vertically is approx. 50 m.
Technology holes for blowing insulation material
During the works, openings on roof from the staircases are done in the side cover of the roof hatch. In the absence of such a possibility (for example roof hatch is located in the lower part of the flat roof) a hole on top of roof in roof panels is done.
The patch of heat-sealable membrane covering the hole installation
We also make holes in the communication holes in openwork walls in order to implement the insulation around the object from one hole. In the case of a small height of the flat roof, the spaces are also filled with a thermally insulating material through openings in the walls.
In the case of flat roof space which is very low (10-15 cm) the installation of thermal insulation material is performed through small holes (10 cm) carved in roof panels. In this case, the space is usually filled in entirely.
In some cases it is advisable to install the thermal insulating material through vents provided in the side walls of the building
Other technical conditions
Hose for transport of material and installation hole
In the case of warming the roofs at a height between the ceiling of approx. 20 cm at the edges the vents they are covered, therefore there is a need to mount additional discharge stack in flat roof part of the roof. This occurs most often in the places where technological installation ports were made.
Places for using insulation with blowing method
- ventilated roofs
- layered walls
- the pawns of installations central heating and water installation
- roof surfaces
- frameworks and floors on joists.
Thermal insulation materials used in thermal insulation by blowing
Flat roof space before and after blowing mineral wool
Granules of mineral wool (Granrock) – have low thermal conductivity Λ = 0.041 W / m • K. This product throughout its life retains all the physical and chemical properties. As it is made from inorganic material it is resistant to water. Thus effectively prevents the accumulation of moisture. For this reason there are no conditions for the development of microorganisms and decay. Non-flammable mineral wool provides excellent fire protection. It also prevents the spread of fire, which protects human life and prevents serious material losses. Technical insulation of products may be used in operating temperature up to 750°C.
Granules of glass wool (Ursa, Gulull) – also have low coefficients of thermal conductivity Λ = 0.034 ÷ 0.042 W / m • K and good sound absorbing properties. These materials are non-hygroscopic, non-flammable, light, density of approx. 20 to 25 kg / m3. Materials are also resistant to rodents. Loose glass wool settles slightly.
Granules of cellulose fibers (Warmcel, Ekofiber) – thermal conductivity Λ = 0.041 ÷ 0.043 W / m • K. These are bulk materials, fibrous, with no adhesive (crushed and impregnated cellulose fibers). The cellulose fibers are impregnated with boron compounds to protect them against fungal growth and mold as well as give them the characteristics of the material which is resistant to external fire. The density of the materials is in the range of 30 to 65 kg/m3 (according to the septum).
The advantages of thermal insulation of buildings (thermomodernization) by blowing
- the thermal insulating material can reach any space
- tightly fills an insulated space
- creates a uniform closed insulating layer
- prevents the formation of so-called. thermal bridges to ensure the continuity of insulation
- for use with high efficiency (approx. 80 m / h)
- it is non-invasive – it does not distort the conditions of using buildings
- reducing costs due to lack waste.
