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Attic insulation
Materials
Benefits
Questions / Answers
Video
Attic insulation
Materials
Benefits
Questions / Answers
Video

ATTIC INSULATION
Effective attic insulation - reduce energy consumption and increase home comfort.
Insulation solutions in the attic
The loss of heat passing through an insufficiently insulated attic is 20-30%. Therefore, attic insulation is one of the most effective heat-saving measures, which gives an immediate effect. An insulated attic will save on heating costs and extend the life of the building.

loose wool is recommended to be used in new buildings as well, but more often this problem affects houses built at the beginning of the 20th century and apartment buildings built during the Soviet era, where a 15-20 cm thick layer of slag, expanded clay or chips is usually used as a thermal insulation material. Such insulation does not meet modern thermal insulation requirements, therefore the attic cover must be additionally insulated. The recommended additional thermal insulation thickness is at least 20 cm. As energy efficiency requirements grow in Scandinavia, a layer of up to 70 cm of loose wool is incorporated into buildings.



  • 1
    Anti-condensate film
  • 2
    Air distribution for attic ventilation
  • 3
    Wind barrier for attic ventilation
  • 4
    loose wool PAROC BLT-9
  • 5
    Existing insulation (slag, chips)
  • 6
    Air intake
Shelter insulation

During the renovation of buildings, when building an attic, it is often thought that the heat does not escape from the newly built room, but the insulation of the eaves is forgotten. They make up about 30% of the total surface area to be heated, therefore, warming them increases energy efficiency, reducing the means used for heating. As we can see in the schematic drawing below, the heat from the lower floor gets into the roof through an additional unheated slag layer, melting the snow on the roof and forming icicles.

Old wooden buildings are characterized by heat leakage through wall gaps. The warm air, stopping against the facade finishing boards or decorative brickwork, rises up and flows out of the building. Loose stone wool is also great for solving this problem. With the help of the cotton feed tube, you can easily access and insulate the narrow shelters.
Materials
Paroc loose stone wool BLT
PAROC BLT is a non-combustible loose stone wool thermal insulation for attic coverings in new and existing buildings. With this product, it is easy to perform thermal insulation in hard-to-reach places by creating a continuous layer of thermal insulation. Rock wool thermal insulation is dry, it does not settle and does not shrink.

Paroc BLT-3 - loose stone wool, produced from soft wool scraps.
Paroc BLT-9 - loose stone wool, produced from various scraps of hard plates.
Isover loose glass wool KV 041
ISOVER KV 041 is loose glass wool (loose mineral wool) packed in bags. It is mainly used for attic insulation. It is very suitable for horizontal constructions. ISOVER KV 041 is non-flammable. ISOVER KV 041 loose glass wool is inorganic, chemically neutral and does not contain corrosive substances. ISOVER KV 041 is rot-resistant, odorless and will not harbor pests.
Eco wool or cellulose wool
Eco wool is made from newsprint, which is processed using special processing methods into ecologically pure cellulose fiber, to which antipyretics and antiseptics are added.
Benefits
Rock wool is fireproof. It has A1 class, which corresponds to an absolutely non-combustible material. As proof of this, there is a PAROC stand at the construction exhibition every year, where wool is burned with an open flame at a temperature of 900 degrees celsius.
Insulation with loose wool is much faster compared to rolls or sheets. The best way to apply loose wool is with the help of a special mechanical device that also acts as a material feeder, ensuring optimal consumption. With this technology, it is possible to insulate up to 100 m2 per day. After installation, the loose stone wool settles by only 5%.
Compared to roll and sheet materials, loose stone wool forms an even thermal insulation layer without gaps and joints, and also tightly fills the spaces around communications and roof structures, ensuring high heat resistance. It retains its thermal insulation properties throughout the life of the building. Its specific thermal conductivity is 0.041 W/mK according to EN13162.
The cost of loose wool is 20% lower compared to other types of insulation, and it has no scraps, which makes its use even more profitable.
Loose stone wool is not chemically treated, so you don't have to worry about your health fearing the release of harmful substances
Stone wool is a breathable material that will protect against the growth of fungi and mold in places where thermal insulation meets building structures.
Stone wool is light, but with high density. Its density is higher (45 kg/m3) than mineral wool in rolls (10 kg/m3), so convection (air flow) does not occur through wool, reducing heat loss.
Compared to ecowool, PAROC stonewool is not hygroscopic (does not absorb moisture), so there is no additional heat loss in wet weather. In addition, as moisture is absorbed and released, cellulose insulation also releases chemicals with which it has been treated.
Q&A
  • Question:
    Is Paroc stone wool the same eco wool?
    Answer:
    No, Paroc loose cotton wool is not shredded pulp (newspaper). It is produced from scraps of sheet rock wool by grinding it into small pieces of 1-3 cm.
  • Question:
    What makes loose stone wool better than ecowool?
    Answer:
    Rock wool has several advantages compared to cellulose wool:
    • Stone wool is completely non-combustible, eco-wool is smoldering, burning with it
    • Stone wool does not absorb moisture from the environment, eco wool - absorbs and releases moisture.
    • Rock wool is not treated with chemicals, boron or borax is added to ecowool to reduce the burning of cellulose.
    • After installation, loose stone wool settles by only 5-7%, while ecowool 15-20%
  • Question:
    Do pests live in stone wool?
    Answer:
    Loose stone wool is not a good environment for rodents, because the caves created in it brake down. Rodents do not live in Ecovate because of the added chemicals. Think! If rodents don't live in it, why would you want to live near it?
  • Question:
    Should a windproof film be applied over the wool after installation?
    Answer:
    After laying the loose wool, there is no need to cover anything on top of the cotton wool. It is approved and recommended by Paroc.
  • Question:
    Should the old insulation be taken out (slag, shavings)?
    Answer:
    If you are carrying out a more extensive renovation of the house, then you can also remove the old insulation, but if only the attic insulation is being carried out, then we do not recommend taking out the slag or chips, because in this way the load-bearing structures are lightened, as a result of which cracks may appear in the ceiling of the last floor.
  • Question:
    Do you need to install vapor insulation?
    Answer:
    According to Paroc's recommendations, vapor insulation should be placed under the stone wool. An exception could be if loose stone wool is laid on an already existing old thermal insulation. To find out the right solution for you, please contact us.
  • Question:
    What preparatory work must be done before insulation and does SIA "Kalo Būve" perform them?
    Answer:
    Before installing loose stone wool, the attic must be prepared accordingly.
    You have to pick up all the stuff there.
    Walkways must be created to access the skylight, chimneys, heating vent valves, etc. Boardwalks should preferably be 5 cm higher than the intended thermal insulation layer.
    "Wind pockets" should be created so that the attic ventilation is not blown away with the loose wool. However, each case is individual, so it would be desirable to consult with us first to find out the right solution.
    SIA "Kalo Būve" offers to perform a complete set of attic insulation, including all preparatory work.
  • Question:
    Is it possible to blow on inclined and vertical walls?
    Answer:
    With proper preparation in advance, it is possible to embed the loose wool in the sloping parts of the roof, as well as in vertical walls. We have at our disposal a machine capable of providing a pressure of 5 MPa, with the help of which the loose can be compressed, thus preventing it from settling.
  • Question:
    Is there a lot of dust during work?
    Answer:
    There is a little dust in the attic when the loose wool is incorporated, but it does not enter the living spaces because the rock wool is transported through the pipe.
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