Floor insulation

• Stability, flatness of the surface and safety – the loads provided for by the design must be transmitted by the floor to the supporting structure without any damage or permanent deformation
• Acoustic protection – in accordance with Standard SRPS U.J6.20 1, a ceiling between two flats should fulfill the requirement for the minimum value of acoustic insulation power R_w of 52dB and the maximum value of impact sound level L_w of 68dB
• Thermal protection – in accordance with the technical conditions for thermal protection of buildings, as per Standard SRPS U.J5.600
• Fire prevention – as prescribed by the regulations of fire prevention; in case of fire, or during decomposition of floors, materials incorporated in the floors must not release toxic gasses that may increase the danger and make the rescuing of people more difficult.

• The highest level of impact sound protection is ensured – such floors belong to the class of improved acoustic protection in accordance with the existing Standard
• Reduced transmission of air sound through mezzanine structures – excellent absorption material
• Thermal protection also provided – thermal conductivity group 040
• Improved fire prevention of the building – incombustible material with extremely high melting temperature of above 1000˚C, thus providing a longer fire prevention
• Excellent adaptation to possible minor uneven areas of the base – slabs are flexible with stable shapes
• There is no possibility that sound and thermal bridges may occur – good adherence of slab edges reduces the possibility of clearance formation between slabs
• A longtime tradition of installation – simple and fast installation
• Possibility of constructing a floor over installation ducts – installation ducts may be conducted through the insulation layer

Floating floor structure

• 1. Edge divides of Knauf Rock stone wool d=1cm, against surrounding walls in order to separate the floating floor structure from the walls and prevent the occurrence of sound bridges i.e. prevent lateral conduction of sound; the height of divides is greater than the total floor height
• 2. Insulation slabs of Knauf Rock stone wool are precisely positioned next to each other; stone wool to be used depends on the floor purpose and expected load:

• 3. PE or PVC foil with an overlap of 10-15cm that should be stuck with common wide adhesive tape; the foil is intended for protecting the insulation from damping during the construction of wet screed or when the floor is located above an unheated space; the foil is bended from horizontal to vertical position, against the wall, at the height above the edge divides
• 4. Rigid slab – two methods are used depending on the material:
• “wet” method: wet screed (screeded bed) is commonly obtained by casting of cement concrete in situ – the thickness must not be less than 4cm (note: the thickness depends on the designed load and the compressibility of insulation layer – consult the screed manufacturer); such a screed should be reinforced with a reinforcement mesh or appropriate fibers
• “dry” method: boards for dry screed (chipboard, veneer base etc.) are jointed by nailing or by gluing; ask the manufacturer for information about the bearing capacities of dry screed slabs and for advice about installation
• 5. Depending on the purpose of the room, an appropriate final floor covering should be selected: parquet, laminate, ceramic tiles etc.; before placing it, cut with a sharp knife the excess edge divides and foil above the height of the finished floating floor structure.

• - Knauf Rock insulation slabs should be placed in the direction from the edge walls towards the door.
• - At the construction of a rigid plate, all transport routes leading over the stone wool slabs must be secured with temporary paths.
• - Rigid joints, the so-called sound bridges, may significantly deteriorate or even eliminate impact sound insulation; during installation, it is therefore important to separate the floating floor structure from other construction elements and all possible penetrations.

• Insulation carried out from the lower, colder side of a mezzanine structure – above unheated space or open passages – in the following systems (depending on the particular situation and the solution within design documentation):
• - suspended ceiling KR S or KR SK
• - contact facade KR FAS
• - screw anchored slabs KR P lined with glass quilt
• - ventilated facade KR PVF

Advice for proper use