FACADE INSULATION SYSTEM
- General description of the system
This short description introduces the Thermomaster A-02 external thermal insulation composite system and its accessories.
This product catalogue and THERMOMASTER® A-02 Instruction Guidline issued by MASTERPLAST GROUP providemore detailed information about the system.
Components and structure of the THERMOMASTER® A-02 EPS system:
|1. THERMOMASTER Socle profile |
2. THERMOMASTER FIX adhesive (4 – 5 kg/m2)
3. ISOMASTER EPS H-80 thermal insulation
4. THERMOMASTER D-PLUS anchor (when required)
5. THERMOMASTER ALU/PVC corner bead with fiberglass mesh
6. THERMOMASTER FIX base coat (4 – 5 kg/m2)
7. MASTERNET fiberglass mesh (1,1 m2/m2)
8. THERMOMASTER FIX base coat
9. CORATREND Primer (1,6 – 2 dl/m2)
10. CORATREND finishing layer (2,3 – 3 kg/m2)
11. ISOMASTER XPS thermal insulation
12. CORATREND marble plaster (3 – 4 kg/m2)
Components and structure of the THERMOMASTER rock-wool system:
1. THERMOMASTER socle profile
Before the start of construction works, the building must be examined:
the material and the thickness of the wall, the poten-tial thermal bridges and their positions, the quality and moisture content of the surface (underground), as well as the quality and the thickness of the existing plaster layer.
Depending on the material and thickness of the wall, the following insulation thicknesses are recommended to be observed (for flats or offices):
*in these cases, application of the thicker insulation than required is necessary because of the risk of vapour condensation. In bathrooms and wet
spaces the internal surface of the walls must be tiled up to the ceiling (for more details see: THERMOMASTER A-02 Instruction Guideline).
Recommendations for the application of the system:
The wall must be free of loose plasters, particles and paints, if necessary, the surface unevenness can be repaired by cement plaster. In case of strongly absorbing wall (e.g. porous concrete), it is recommended to use THERMOMASTER PRIMER).
First step is the fixing of the socle profile by hammer fixed expansion plug (4pcs/m), minimum 30cm above the level of ground or pavement. The unevenness of the wall can be equalised with plastic spacers, the lengthening of the socle profile is with profile connector.
The temperature of air and the base surface must be over (+)5°C during the adhesion of ISOMASTER EPS boards. The dry THERMOMASTER FIX must be mixed with water (as specified on the packaging) and after 2–3 minutes of rest, remixed again. The mixed adhesive shall be used within 20 – 30 minutes depending on the ambient temperature, but dilution of it after mixing is not allowed. The adhesive should be applied alongside, as well as in 2-3 spots in the middle of the insulating boards, (do not apply the bonding material onto the edges of the board). The bonded surface must be minimum 40% of the tight-jointed ISOMASTER EPS board, the thickness of the adhesive should be 0,5–2,0 cm.
After setting of the adhesive (minimum 1-2 days, depending on the temperature), the following step is the anchoring. If the height of the façade is less than 8m, anchoring is only necessary, when the bonded surface were critical (e.g. plastered, painted, strongly absorbing). Over 8 meter building height, supplementary anchoring is always necessary, 4–8–12 pcs/m2 is recommended, depending on the type of anchor, material of the wall and the building height (for more details see: THERMOMASTER A-02 Instruction Guideline). The effective anchoring depths must be always observed, and kept (e.g. in consideration of the thickness of existing plastering).
After eliminating of the surface unevenness, the following step is bonding of the corner beads, balcony profiles,connecting profiles and movement joints.
The whole surface must be reinforced with MASTERNET alkali-resistant fiberglass mesh, embedded in THERMOMAS-TRER FIX base coat layer. This working process is very sensitive to weather conditions, the ideal ambient and surface temperature is (+)5 – (+)25°C. During the setting of the base coat (minimum 1-3 days), the temperature is not allowed to sink under (+)5°C, in case of too warm (over (+)25°C) or windy weather, supplementary precautions must be made. The adequately mixed THERMOMASTER FIX must be used within 20-30 minutes. The material (~3 kg/m2 in the first layer) is applied onto the surface of ISOMASTER EPS boards by an 8- mm-notched trowel, then the fiberglass mesh must be em-bedded with 10 cm overlapping. The second layer of base coat requires only ~1,5 kg/ (m2) material.
A thin key coat (CORATREND Primer) is necessary after setting of the base coat, which is intended to act as a preparation for the application of the finishing coat. Before applying the finishing coat, the primer must be completely dried. The top coat (CORATREND or CORAMIX) can be made with acrylic or silicon dispersion. A considerable advantage of silicone disper-sion, that its vapour transmission and water-repellent ability is better. Floated and ribbed structure with particle size of 1,5 mm and 2 mm can be chosen. When choosing the colour of the finishing coat, it must be considered, that the same colour can look slightly different on big surface than on the colour patterns.
Before the colouring works, the following tasks must be performed:
- CORATREND finishing coat made of the same production charge (indicated on the label at the plastic pail) shall be used at the same part of the façade surface, otherwise the materials derived from different charges must be mixed.
- the plaster deposited on the cover of the pail must be scraped back into the pail.
- CORATREND finishing coat can be diluted with maximum 0,5-2,5 dl of water/pail, depending on the weather conditions, the amount of added pigment and the absorption capacity of the base coat. In every pail, the same quantity of water must be added, then mixed evenly, but the dilution extends the setting time on the wall, especially when the vapour content of the air is high.
Applying of CORATREND finishing coat is also very sensitive to weather, warm and windy weather is not suitable for high quality work. The optimal temperature is about (+)15-(+)25°C. Between (+)25-(+)30°C, colouring could happen only on shaded surface, cold weather (below (+)10°C) condition and the high vapour content (over 75%) is not proper. Fresh top coat should be protected from wind, intensive UV-radiation, freezing and rain.
For the insulation of the footing part of the building, extruded Polystyrene thermal insulation boards shell be used, the bond-ing and coating happens on the similar way than in case of EPS, but the finishing layer is CORAMIX marble plaster. Applica-tion of coloured primer is here also advised. Coverage of marble plaster is ~ 3 – 4 kg/ (m2), before application, moderate mix-ing of it is necessary. During setting of the marble plaster, the temperature must not sink below (+)10°C or exeed(+)30°C, and the relative vapour content of the air can not exeed 75%!