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EXTERNAL THERMAL INSULATION COMPOSITE SYSTEM WITH RENDER COATINGS
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| ATLAS is an External Thermal Insulation Composite System (ETICS) with render coatings. The product has been given European Technical Approval no. ETA-06/0081 issued in accordance with guidelines of European Technical Approvals ETAG 004: 2000. It concerns all products included in the following thermal insulation systems: ATLAS STOPTER K-10, ATLAS STOPTER and ATLAS HOTER. The main objectives of the system are as follows:
- providing external walls with appropriate thermal insulation,
- increase durability of external walls by ensuring better protection from weather. The thermal insulation technology consists in fixing thermal insulation made of foamed polystyrene boards to the substrate and preparation of a reinforced layer, a render coating and, optionally, a paint coating on the insulation. ATLAS can be used only as an adhered system or as an adhered system with additional mechanical fixing. The system can be applied on new or existing external surfaces of vertical building wall (plastered or not) made of masonry or adhered materials, such as bricks and blocks (ceramic, lime-sand, stone, cellular concrete), or of concrete (poured at the construction site or in the form of prefabricated elements). It can also be fixed on surfaces of horizontal or tilted structural elements provided that they are not directly exposed to precipitation. These may include ceilings over passages, internal walls and roofs (on the ceiling’s side) of garages or cellars adjacent to heated rooms. The substrate on which ATLAS will be used should have reaction to fire class: A1 or A2-s1 d0 according to EN 13501-1. |
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Parameters of the system and its individual parts ensure that all technical, usable and utilisation requirements assumed for the intended use are met by correctly designed and constructed thermal insulation. In respect of reaction to fire, ATLAS system has been classified according to EN 13501-1 as: B - s2, d0 for the system with foamed polystyrene board not exceeding 250 mm thickness, finished with ATLAS CERMIT or ATLAS SILKAT; C - s2, d0 for the system with foamed polystyrene board not exceeding 250 mm thickness, finished with ATLAS CERMIT or ATLAS SILKON. Water absorbability of the reinforced layer and individual finishing layers specified after 24 h in each variant does not exceed 0.5 kg/m2; therefore, the system is resistant to freeze-thaw cycles. ATLAS system is also fully resistant to thermal-humid cycles. In respect of the impact strength, regardless of the arrangement of finishing layers (with one layer of glass fibre mesh), the system has been classified for III utilisation category. If correctly designed, the system prevents surface and internal water vapour condensation. Diffusion resistance, expressed in equivalent thickness of air layer Sd for the least favourable arrangement of the finishing layer in the system (including a paint coating) is only 0.49 m. The manufacturer declares that adhesion between the reinforced layer and thermal insulation (EPS), and the adhesive and thermal insulation is no less than 0.1 MPa, whereas between the adhesive and substrate (concrete) – no less than 0.6 MPa. The manufacturer declares that adhesion between the reinforced layer and thermal insulation (EPS), and the adhesive and thermal insulation is no less than 0.1 MPa, whereas between the adhesive and substrate (concrete) – no less than 0,6 MPa (ATLAS STOPTER K-20 and ATLAS HOTER U) and no less than 0.3 MPa (ATLAS STOPTER K-10 and ATLAS HOTER S). Thermal resistance of the finishing layer of the system (the reinforced layer with the plaster coating) Rrender is ca. 0.02 m2 K/W.
Layer arrangement in ATLAS system
1. Primary fixing
2. Thermal insulation
3. Additional fixing
4. Reinforced layer
5. Priming mass
6. Render coating
7. Priming preparations
8. Paint coating
Components of the system
Only the following products may be included in ATLAS system:
1. Primary fixing
For fixing thermal insulation, use one of the following adhesives:
- ATLAS STOPTER K-10,
- ATLAS STOPTER K-20,
- ATLAS HOTER S – ATLAS HOTER U.
2. Thermal insulation layer
Thermal insulation comprises of seasoned self-extinguishing expanded polystyrene EPS with minimum reaction to fire class: E, maximum density: 20 kg/m3, thickness: 20÷250 mm, carrying the following codes:
- (EPS - EN 13163-T2-L2-W2-S1-P3-BS115-CS (10) 70-DS (N) 2-DS (70,-) 2-TR100),
- (EPS - EN 13163-T2-L2-W2-S2-P4-BS115-CS (10) 70-DS. (N) 2-DS (70,-) 2-TR100),
- EPS - EN 13163-T2-L2-W2-S2-P3-BS115-CS (10) 70-DS. (N) 2-DS (70,-) 2-TR100),
- (EPS - EN 13163-T2-L2-W2-S2-P4-BS115-CS (10) 70-DS (N) 2-DS (70,-) 1-TR150).
3. Additional fixing
Additional fixing is done using the following fasteners:
- EJOT Ejotherm ST U according to ETA-02/0018,
- EJOT Ejotherm NT U according to ETA-05/0009,
- EJOT Ejotherm STR U according to ETA-04/0023,
- EJOT SDM-T plus U according to ETA-04/0064,
- HILTI SX-FV according to ETA-03/0005,
- HILTI SD-FV 8 according to ETA-03/0028,
- Fischer TERMOZ 8N according to ETA-03/0019,
- Fischer TERMOZ 8U according to ETA-02/0019,
- WKRĘT-MET-ŁIT and WKRĘT-MET-ŁIM according to ETA-05/0225,
- WKRĘT-MET-ŁFN ø 8 and WKRĘT-MET-ŁFM ø 8 according to ETA-06/0080,
- WKRĘT-MET-ŁFN ø 10 and WKRĘT-MET-ŁFM ø 10 according to ETA-06/0105.
- Koelner KI8M according to ETA-06/0191
4. Reinforced layer:
Reinforced layer comprises of ATLAS STOPTER K-20 or HOTER U containing set glass fibre mesh SSA 1363 SM (100) or VERTEX 145A/AKE145A/R117 A101.
5. Primers
ATLAS CERPLAST (under mineral and acrylic renders), ATLAS SILKAT ASX (under silicate renders) or ATLAS SILKON ANX (under silicone renders).
6. Render coating:
- mineral ATLAS CERMIT SN, SN-MAL or DR,
- acrylic ATLAS CERMIT N or R,
- silicate ATLAS SILKAT N or R,
- silicone ATLAS SILKON N or R.
7. Paint primers:
- ATLAS ARKOL SX (under silicate paint),
- ATLAS ARKOL NX (under silicone paint).
8. Paint coating:
- acrylic ATLAS ARKOL E,
- silicate ATLAS ARKOL S,
- silicone ATLAS ARKOL N,
- silicone ATLAS FASTEL.
9. Supplementary components
- Finishing profiles
- Drip profile with reinforcing mesh - PVC 10/2500 - white,
- Corner profile with reinforcing mesh - PVC 23/2500 - white,
- Window profile with reinforcing mesh - PVC 6/2400 - white,
- Window profile with reinforcing mesh - PVC 9/2400 - white,
- Straight front expansion profile with reinforcing mesh - PVC 10-30/p/2000 - white,
- Angle front expansion profile with reinforcing mesh - PVC 10-30/k/2000 - white,
- Sill profile with reinforcing mesh - PVC 15/2000 - white,
- Skirting boards made of PVC,
- Skirting boards made of aluminium, |
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In the system design and during work, take into account requirements of ETAG 004: 2000, ETA--06/0081 Approval, and technical and legal regulations applicable in the country in which the system will be used, in particular in respect of partition insulation, energy requirements, structural safety, fire safety, and conditions of work commencement and conduction. Moreover, carry out all work in accordance with information included in the technical project of the thermal insulation, ATLAS technical instructions and Technical Sheets of individual system components. Technical documentation should be developed individually for each building and adjusted to its degree of complexity. ATLAS system consists of non-bearing structural elements; therefore, it does not affect stability of elements to which it is fixed. The value of additional thermal resistance R the wall achieves after the system is applied needs to be calculated in accordance with EN ISO 6946 as the total of product’s thermal resistance to thermal insulation and thermal resistance of the finishing layer Rrender. If required in accordance with EN ISO 6946, calculations should take into account effect of thermal bridges resulting from application of mechanical fasteners. The system complies with the criteria of item 5.1.4.2 in ETAG 004: 2000. Therefore, no limits as to wall length or the distance between system expansion profile are introduces unless these result from other requirements, in particular structure of the building in which the system will be used. Carry out thermal insulation work in favourable weather. Substrate and ambient temperature during work and when individual materials dry should be from +5°C to +25°C. The façade should be covered and protected from precipitation, direct sunlight and strong wind.
Substrate
The substrate should be even, structurally sound and free from anything that may impede mortar adhesion. Hammer off loose or flaking elements and fill in defects using materials recommended for that purpose e.g. ATLAS PLASTERING MIX, ATLAS LEVELLING MORTAR. ATLAS system can be fixed to substrates covered with strongly adhering coats of façade paints or thin-layer plasters. In case of adhering thermal insulation, use ATLAS STOPTER K-20 or ATLAS HOTER U. Wash off under pressure or scrape off the remainder of poorly adhering paint coats. In case of weak, dusty or highly absorptive substrates, prime using ATLAS UNI-GRUNT. The substrate should be prepared in accordance with ETAG 004: 2000 requirements. If in doubt as to substrate quality, assess its loading capacity in actual conditions. The result (adhesion) should not be lower than 0.08 MPa; then, damage in the thermal insulation layer can be deemed as a positive result of the tearing test of the adhered square.
Foamed polystyrene board fixing
Thermal insulation thickness should be selected individually for each wall in the building, among others, on the basis of overall heat-transfer coefficient U. It should comply with thermal insulation requirements of partitions specified in applicable legal and technical regulations. Begin with fixing a skirting board on the wall. It ensures even level maintenance in case of the first and successive layers of foamed polystyrene boards and reinforces the lower system edge. It should be fixed on the base of the building not lower than 30 cm under the ground level. This distance ensures system protection from capillary moisture and secures the plaster coating from dirt such as mud caused by raindrops falling on pavement or ground. If a skirting board cannot be used (e.g. if the thermal insulation layer is thicker than the largest available board size), it is allowable to use two layers of glass fibre mesh with a drip profile on the lower edge of the thermal insulation. When the skirting board is fixed, begin application of the thermal insulation. Fix the first row of boards on the basis of the skirting board. Place successive boards alternatively (vertical joints between boards should be shifted in relation to one another). This is applicable on the wall surface and in building quoins. The main component that fixes the thermal insulation to the substrate is the adhesive. It is applied on boards using the “strip-point” method. The circumferential block located along board edges should be at least 3 cm wide. Evenly distribute 6÷8 patches of 8÷12 cm in diameter on the remaining surface. The mortar applied should cover at least 40% of board surface. Place the board on the substrate and press it down the substrate immediately after mortar application. In case of even and smooth substrates, the mortar can be evenly distributed using a notched float on the whole board surface to ensure 2÷5 mm layer thickness. Begin additional fixing of the thermal insulation using mechanical fasteners not earlier than 1 day after foamed polystyrene board fixing. Details as to the quantity, type and length of fasteners and their arrangement should be included in the thermal insulation project. Unless the technical documentation specifies requirements in this respect, use ca. 4÷5 fasteners for 1 m2. Use mechanical fasteners in corners of buildings or in case of foamed polystyrene that is more than 15 cm thick. Additional mechanical fixing is required if thermal insulation of buildings is more than 12 m high. The anchoring depth of additional fixing elements in the structural wall layer should be consistent with requirements of their manufacturers. To improve resistance of thermal insulation layer arrangement to mechanical damage, ensure free water removal and professional preparation of expansion joints, fix finishing profiles on the thermal insulation layer. The profiles are applied in all special places of the façade such as: corners, reveals, sills, etc. They can also be fixed with setting mesh in the reinforced layer of the system. In case of profile fixing, use ATLAS STOPTER K-20 or ATLAS HOTER U.
Reinforced layer
The reinforced layer consists of a reinforcing mesh made of glass fibre set in an adhesive. The mesh is characterised by appropriate mechanical strength, regular and durable braid, and resistance to alkali. Begin preparation of the reinforced layer not earlier than 3 days after board fixing. Start from grinding possible irregularities of foamed polystyrene boards. Then, reinforce wall surfaces near the contact places of vertical and horizontal quoins of window openings and doorways by setting in ca. 20x30 cm mesh strips. The strips should be at the angle of 45° in relation to the lines determined by reveal edges. To prepare the reinforced layer, distribute the adhesive evenly on the whole thermal insulation surface and then set in successive mesh strips. It is convenient to first press the mesh into the mortar only in a few places and then set in the whole strip using a notched float. If the mesh is set correctly, it is not visible under the adhesive; it should not directly contact board surface. The reinforced layer has to be continuous i.e. successive mesh strips should overlap min. 10 cm, whereas overlaps in quoins should be min. 15 cm. Overlaps are also required in contact places of the proper reinforcing mesh with the finishing profile mesh. Mesh overlaps cannot correspond with joints between foamed polystyrene boards. In justified cases, on ground floors and on bases, apply two mesh layers. Finally, smooth the reinforced layer using a float made of metal. The work has to be very careful not only due to structural reasons, but also because of layer appearance. If there are any irregularities after smoothing, grind them off. Due to small thickness of the plaster coating and the fact that is has to be maintained on the whole façade surface, any irregularities in the reinforced layer may prevent correct plaster coating preparation.
Finishing layer
The external finishing layer of ATLAS system may consist only of a plaster coat made of thin-layer plaster or thin-layer plaster covered with façade paint. In case of a plaster coating made of ATLAS CERMIT SN-MAL, it is absolutely required to prepare a decorative-protective layer made of façade paint. The finishing layer should be selected on the basis of, among others, thermal-humid calculations for wall thermal insulation and conditions of thermal insulation system utilisation. Begin the finishing layer after ca. 3 days after application of the reinforced layer. Regardless of the type of ATLAS thin-layer plaster applied on the thermal insulation, prepare a priming layer made of priming mass on the reinforced layer. The priming coat should be appropriate for a given plaster type. The priming coat will prevent any contamination of adhesives from reaching the render layer, reinforce the substrate and increase plaster adhesion to the substrate. Moreover, priming coats may serve as temporary protective layers of the reinforced layer (before plaster is applied) for up to six months from their preparation. The plaster coating can be made of thin-layer plasters of aggregate grain size from 1.5 mm to 3.0 mm (depending on plaster type). Use ATLAS façade paints to cover them, in accordance with the technology described in respective Technical Sheets. Plaster and paint colours are shown in the NEW ATLAS COLOUR PALETTE containing almost 700 items.
System maintenance
To keep the properties of the thermal insulation system, periodically inspect and maintain its finishing layer. This includes in particular immediate repairs of incidental damages and covering plaster with paint or other cleaning or protective coating materials. For repair and maintenance work, use components of ATLAS system that has been given Approval no. ETA-06/0081, and ATLAS products according to Technical Sheets. |
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| European Technical Approval
ETA 06/0081
ETAG no. 004/2000
EC Certificate of Conformity
1488-CPD-0021
EC Certificate of Conformity no. E001 |
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