Contact facade



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Contact  facade with Knauf Rock stone mineral wool is intendedfor new buildings, as well as for additional insulation of existing thermallynon insulated or insufficiently insulated buildings.  

KR FAS stonewool slabs may be glued to any flat, hard, dry and clean base. At existingbuildings, check the old mortar, remove falling parts and fill up such placesby classic plasterwork. 



1.  Installation of the bottom end profile

The bottom endaluminium profile is fastened with screw anchors (according to themanufacturer’s recommendations). It provides a firm facade end, protects thelower edge of the slab and enables the fitting of insulation material in ahorizontal plane.  

2.   Applicationof glue

Glue for stone mineral wool is applied in a line along the slab perimeter and in spots over the inner surface of the slab. At least40% of the slab should be covered with glue. Joints between slabs must not beadditionally filled with glue. 


3.   Gluingof stone mineral wool slabs to the basic structure

KR FAS stone mineral wool slabs are laid close to eachother, by pressing the slab that is being placed next to the previously gluedone. The next row should be staggered for a half slab length in relation to theprevious row. The flatness of external surfaces is constantly checked with ascreed rail of appropriate length. Corners of windows and doors must beprovided with whole slabs in order to avoid cracks in the corners of the finallayer of mortar. 


4.   Fixingof stone mineral wool slabs with screw anchors  

Type and length of screw anchors should bedetermined according to the base type (in accordance with the recommendationsof the screw anchors manufacturer). Generally, the recommended screw anchorsare polyethylene screw anchors with steel screws and head diameters of 60mm. Properfixing of a slab will be achieved with 6 screw anchors per m2 (3 screwanchors per slab), with a note that at the corners of a building 8 – 14 screwanchors per m2 should be used. 


5.   Installationof angle irons with a mesh and reinforcement of  the corners of openings

Before applying the first layer of glue intowhich a glass mesh is impressed, all corners of the building and openings onthe facade should be reinforced with angle irons with an integrated glass mesh.In order to prevent cracking of the facade, an additional strip of glass meshshould be placed on the corners of the openings at the angle of 45º in relationto the given angle, with dimensions of 20x40cm.


6.   Applicationof glue into which a reinforcement mesh is impressed

Into the firstlayer of freshly and uniformly applied glue, an alkali resistant reinforcementmesh made of glass fibers is impressed with an obligatory overlap (min 10cm). Thenthe second layer of glue is applied so that the glass net position is in theexternal third of the glue. Nominal thickness of the total applied glue is 5mm.


7.  Application of a primer and final layer of the facade

In accordancewith the manufacturer’s instructions, an appropriate primer for the final layerof the facade as defined in the design documentation should be applied onto thedried glue.  

For the final layer of the facade we recommendthe following: silicate, silicone and mineral decorative mortars. 



Notes forinstallation:

  • Any facade construction phase must not be carried out at temperatures below +5ºC or above +25ºC, while it is raining or in strong wind
  • For any detailed technicalinformation about the application of a particular material from the system,contact the manufacturer directly