1. outside buildings: external surface of ceilings, e.g. above driveways, walkways, parking spaces situated below heated rooms.
2. inside buildings: ceilings and walls not exposed to mechanical damage in unheated rooms (e.g. garages, cellars), closed and open, adjoining or situated under heated rooms.
The thermal insulation technique involves fixing a thermal insulation layer to the wall, consisting of mineral wool panels, to which a reinforced coat is applied, followed by a finishing coat. There are two options of the finishing coat on the insulation layer: painting the reinforced coat with facade paint (basic version) or applying a thin-layer render to the reinforced coat, which may then be painted if necessary (version required in specific situations). Depending on the design, type of mineral wool and properties of the substrate, can be used as an exclusively adhesive-bonded system or, alternatively, may include mechanical fixing in addition to the adhesive. It can be used both in newly-erected buildings and existing ones that need to be insulated.

ATLAS ROKER G SYSTEM BUILD-UP
1. INSULATED CEILING
2. ADHESIVE: ATLAS ROKER W-20
3.THERMAL INSULATION: LAMELLA MINERAL WOOL
4.GLASS FIBRE MESH EMBEDDED IN ROKER W-20 ADHESIVE
5.PRIMER: ATLAS ARKOL SX FOR SILICATE PAINTS OR ATLAS ARKOL NX FOR SILICONE PAINTS
6.FACADE PAINT: ATLAS ARKOL S – SILICATE PAINT, ATLAS ARKOL N OR ATLAS FASTEL – SILICONE PAINT

In terms of fire reaction ATLAS ROKER G system has been classified in accordance with EN 13501-1:2004 as:
A2 - s2, d0 for a configuration with mineral wool panels with a thickness of 20-200 mm, primer and a 2.00 mm layer of ATLAS CERMIT mineral render or ATLAS SILKAT silicate render with or without a paint coat.
C - s2, d0 for a configuration with mineral wool panels with a thickness of 20-200 mm, primer and a 2.00 mm layer of ATLAS SILKON silicone render with or without a paint coat.
ATLAS ROKER G thermal insulation systems has also been classified as:
- non-flammable as to the degree of flammability (in configuration with ATLAS CERMIT mineral render or ATLAS SILKAT silicate render).
- not spreading fire (NRO) in terms of fire spreading by walls, when exposed to fire on the façade side.
- flash resistant as to the degree of flammability (with ATLAS SILKON silicone render),
- non-dripping and non-separating when exposed to fire in terms of dripping and separating from the ceiling when exposed to fire
THERMAL INSULATION
The thermal insulation consists of factory-made mineral wool panels (MW):
normal – with random fibre orientation and lamella – with uniform fibre orientation, perpendicular to the panel surface. Panel thickness: 20-200 mm.
ATLAS ROKER G thermal insulation system should include the following types of mineral wool panels:
- FASROCK coded MW-EN13162-T4-DS (TH)-CS (10) 40-TR15-WS-WL (P)-MU1,
- FASROCK L coded MW-EN13162-T5-DS (TH)-CS (10\Y) 40-TR100-WS-WL (P)-MU1,
- FASROCK XL coded MW-EN13162-T5-DS (TH)-CS (10\Y) 40-TR100-WS-MU1,
- FASROCK MAX coded MW-EN13162-T4-DS (TH)-CS (10) 10-TR7,5-WS-MU1,
- PAROC FAS 3 coded MW-EN13162-T5-DS(TH)-CS (10) 30-TR10-WS-WL (P)-MU1,
- PAROC FAS 4 coded MW-EN13162-T5-DS (TH)-CS (10) 40-TR15-WS-WL (P)-MU1,
- PAROC CGL80 coded MW-EN13162-T5-DS (TH)-CS (Y) 50-TR80-WS-WL (P)-MU1,
- PAROC FAL 1 coded  MW-EN13162-T5-DS (TH)-CS (Y) 50-TR80-WS-WL (P)-MU1.
- ISOVER PF coded MW-EN13162-T5-DS (TH)-CS (10) 40-TR15-WS-WL (P)-MU1,
meeting the requirements of PN-EN 13162:2002 standard, classified as A1 with regard to fire reaction according to PN-EN 13501-1:2004 (equivalent to “non-flammable” according to the Ordinance of the Minister of Infrastructure of 12 April 2002; Journal of Laws No.75, item. 690), or
- non-flammable mineral wool panels produced by other manufacturers, authorised for sale, with codes in accordance with those listed above meeting PN-EN 13162:2002 standard, or if the results of heat insulation system tests including these panels meet the requirements specified in the technical approval. The thickness of thermal insulation material should be selected individually for each wall of the building, based on the calculations of thermal and moisture-related properties, with special consideration given to the heat transfer coefficient, U_k. The heat transfer coefficient should meet the requirements as to the thermal insulation properties of the individual partitions, set out in the ordinance on the technical conditions that should be met by buildings and their locations.

Attaching mineral wool panels

From the point of view of technical design and load transmission, the system can be used as an exclusively adhesive-bonded system (with lamella mineral wool panels) or, alternatively, adhesive-bonded with additional mechanical fixing (with normal or lamella mineral wool panels). In the case of lamella mineral wool panels, the panels can be attached using only adhesive, without mechanical fasteners, provided that the substrate is uncoated (unrendered) with a tensile strength of 0.08 MPa or above, and the thermal insulation is not installed above 20 m height. In such cases the adhesive coat should cover the entire back surface of mineral wool panels. Otherwise, the mineral panels should be attached using an adhesive and mechanical fasteners for mineral wool (the recommended number of fasteners is 4 -10 for 1 m²). The adhesive is applied to the entire back surface of lamella panels. First, a thin coat of adhesive is applied to the panel surface. Once the adhesive has set, a second layer is applied using a notched trowel. In the case of thermal insulation using normal panels (with a random orientation of fibres) the panels must be attached using both an adhesive and mechanical fasteners (the recommended number of fasteners is 4-6 for 1 m²). The adhesive can be applied to the panels by two methods: to a portion of the panel surface, in dabs and strips, or to the entire back surface of the panel (only if the substrate is flat). In both cases a thin layer of adhesive should first be applied to the back surface of the panels.  Next, using the first method, the principal layer of adhesive is applied in a 3-5 cm wide strip along the panel perimeter and 6 - 8 dabs 8 -12 cm in diameter, evenly distributed on the remaining surface. The adhesive applied to the panel should cover at least 40% of its surface. If the second method is used, the adhesive is applied to the entire panel surface using a notched trowel. For both lamella and normal types of mineral wool, when the adhesive has been applied,  the panel should be immediately placed on the substrate slid to position and pressed against the substrate. Subsequent rows of panels should be staggered (the vertical joints between panels should alternate).Additional fixing using mechanical fasteners can be commenced no earlier than 24 hours after attaching the panels. Detailed information on the number of fasteners, their length, depth of anchoring and distribution should be contained in the technical design of the thermal insulation, with consideration given to the requirements of manufacturers of mineral wool and the fasteners.

Reinforced coat

The reinforced coat consists of a glass fibre mesh embedded in a coat of ATLAS ROKER W-20 adhesive. The mesh has an appropriate mechanical strength, a uniform and strong weave, and a high resistance to alkali. The installation of the reinforced coat should be commenced no earlier than 3 days after the installation of insulating panels. Installation of the reinforced coat involves application of a uniform coat of ATLAS ROKER W-20 adhesive to the entire surface of thermal insulation material and embedding subsequent strips of reinforcing mesh in the adhesive. First, 2/3 of the final amount of the adhesive is applied to the surface and spread evenly. Then a pre-cut strip of mesh is embedded in the adhesive, first by pressing it into the adhesive in a few places and then by trowelling the surface with a notched trowel until the mesh is completely invisible. Next, the remaining 1/3 of the adhesive is applied and smoothed over the entire surface. A correctly embedded mesh should be completely invisible under the coat of adhesive and it should not be in direct contact with the panel surface. The reinforced coat should be continuous, i.e. the subsequent strips of mesh should overlap by a minimum of 10 cm, and a minimum of 15 cm on corners. The overlaps should not coincide with the joints between adjacent panels. In the final step the reinforcing mesh is smoothed with a steel trowel. This should be done with great care, for constructional and aesthetic reasons.

Finishing coat

In ATLAS ROKER G system two finishing solutions can be used:

- basic version, i.e. coating the reinforced coat with facade paint, or

- extended version, i.e. applying a thin-layer render (with optional coating with facade paint).

Application of render (with or without coating) is essential, both on walls and on ceilings, where the distance from the edges exposed to precipitation is 3 m or more, with the exception of driveways, where the distance should be at least 10 m. On other surfaces it is sufficient to apply a coat of paint to the reinforced coat. The finishing coat can be applied after the reinforced coat has dried, allowing a waiting time appropriate to the selected finishing technique and to the ambient conditions. The reinforced coat can be finished with ATLAS ARKOL S, ATLAS ARKOL N or ATLAS FASTEL paint, in accordance with the procedure described in their technical data sheets. Prior to painting the substrate should be treated with a primer suitable for the type of paint selected. Priming will provide uniform absorption capacity of the substrate and increased paint adhesion. For thin-layer render finish, ca. 3 days after the installation of the reinforced coat, a render primer should be applied (suitable for the selected type of render).The primer coat increases the bond strength between the render and the substrate and prevents the penetration of impurities from the adhesive into the render.  The rendering may consist of ATLAS CERMIT mineral plaster, ATLAS SILKAT silicate render or ATLAS SILTON silicone render with grain size between 1.5 mm and 3.0 mm (depending on the type of render). The render surface can optionally be coated with ATLAS ARKOL S, ATLAS ARKOL N or ATLAS FASTEL paints, in accordance with the procedure described in their respective technical data sheets. The colour range of renders and paints is presented in the NEW ATLAS COLOUR PALETTE, containing nearly 700 items.

FINISHING COAT OPTIONS IN ATLAS ROKER G SYSTEM

Base coat	ATLAS ROKER W-20 adhesive
Thermal insulation	normal or lamella mineral wool panels manufactured in accordance with  PN-EN 13162:2002:
Reinforced coat	glass fibre mesh embedded in ATLAS ROKER W-20 adhesive
Finishing coat	Basic version	Primer: ATLAS ARKOL SX. Silicate paint:  ATLAS ARKOL S
			Primer: ATLAS ARKOL NX. Silicone paint: ATLAS ARKOL N
			Primer: ATLAS ARKOL NX. Silicone paint: ATLAS FASTEL
		Extended version	Primer: ATLAS CERPLAST. Mineral render ATLAS CERMIT SN, DR
			Primer: ATLAS CERPLAST. Mineral render: ATLAS CERMIT SN, SN-MAL, DR Silicate paint: ATLAS ARKOL S, silicone paint: ATLAS ARKOL N or ATLAS FASTEL
			Primer: ATLAS SILKAT ASX. Silicate paint: ATLAS SILKAT N, R
			Primer: ATLAS SILKAT ASX. Silicate paint: ATLAS SILKAT N, R Silicate paint: ATLAS ARKOL S. silicone paint: ATLAS ARKOL N or ATLAS FASTEL
			Primer: ATLAS SILKON ANX. Silicone render: ATLAS SILKON N, R
			Primer: ATLAS SILKON ANX. Silicate render: ATLAS SILKON N, R Silicone paint: ATLAS ARKOL N or ATLAS FASTEL