AVAL ROKER SYSTEM (ETA)

The system is designed for installation of the external wall insulation of buildings - it may be used both on the rendered/plastered façades and rough walls made of bricks and blocks (ceramic, cement-lime, stone, of aerated concrete and

concrete - monolithic or precast).

For thermal insulation with the use of mineral wool - both the façade panels (of thickness 50 - 250 mm) and the lamella panels (of thickness 20 - 250 mm).

For thermal insulation of buildings irrespectively of their height - especially for high buildings and skyscrapers (above 25 m).

Recommended for thermal insulation works in the traditional constructions, energy- saving and passive ones - due to non - flammability the system is recommended for thermal insulation of public access buildings, schools, hospitals, etc.

The system meets European technical requirements - designed for thermal insulation systems throughout the European Union.

Increases fire protection of buildings - increases the safety of their users protecting the construction elements against fire. The system is non-flammable (with mineral renders) and fire retardant.

Very high vapour permeability - does not restrict the water vapour flow through the insulated partition, allowing free drying of the wall technological moisture (diffusion resistance coefficient 0.12 m for the system with mineral render finishing coat).

Impact resistance - the system has been classified as Category I or Category II, depending on the finishing coat type.

Safety of use - the system has been tested in wind load resistance, which is especially important in case of high buildings or located in the mountains or by the sea.

Allows to install the thermal insulation on surfaces of irregular shapes - with the use of lamella panels.

A complete set of materials for thermal insulation installation - provides full and checked compatibility of all components, which is particularly important during the subsequent years of system operation.

Increases durability of external walls - protecting them from direct exposure to weather conditions.

AVAL ROKER system is an external thermal insulation composite system (ETICS). The thermal insulation technology consists in the application of mineral wool panels (MW) onto the outer side of the wall, next the installation of a base coat with reinforcing fiberglass mesh, and further application of the finishing layer made of thin - coat render.

According to the current regulations the thermal insulation system is considered in its entirety as one construction product, therefore it must be applied with the layers arrangement and with materials which are described in its technical approval. It is unacceptable to use the so-called compilations or to use products from other systems or from other manufacturers, which are not covered by the technical approval.

The products used in AVAL ROKER system, according to the European Technical Approval, are listed in the table below:

AVAL ROKER System has been granted:

- European Technical Approval ETA No. ETA-06/0281. Declaration of Performance No ETA-06/0281/CPR.

- NSAI Certificate No. 10/0347 (for Ireland).

- BBA Certificate No. 13/5018 (for the UK).

Carry out the work in dry weather, at the substrate and ambient temperature not lower than +5 °C and not higher than +30 °C. The façade should be on time of thermal insulation work protected and secured against precipitation, strong wind and direct sunlight - it is recommended to use fine mesh scaffolding covers. Insulation works should be carried out in dry conditions (no precipitation, relative humidity below 80%).

Before the work commencement, evaluate the substrate technical condition and on that basis decide on the scope and the method of surface preparation. For the time of works remove any elements hindering tight adhesion of the thermal insulation panels and the finishing coat application. An additional layer of insulation will increase the thickness of the walls, and therefore it will cause the need to increase the reach of flashings, downspouts anchors, etc. For the time of works the windows and doors should be protected against the dirt by a plastic film.

The substrate should be aged, sound, stable, even, clean and dry. The absorbent substrates should be primed with AVAL KT 17, smooth and non-absorbent (concrete) with AVAL KT 16. The substrate should be even to the extent enabling easy execution of a plane formed by the bonded insulation panels on the walls. Clean the surface from any layers which may weaken mortar adhesion, dirt, loose and dusty elements.

Note! Particular attention should be paid to the proper assessment and preparation of substrate with problematic bearing capacity, e.g. finished with glass-mosaics, glazed brick, covered with paint coats, etc. If in doubt, conduct a pull - off test of adhesion (the ultimate tensile strength should be above 0.08 MPa) or apply 8÷10 cubes of mineral wool 10x10 cm each, in various places of the facade and tear them off after 3 days. The use of thermal insulation system for buildings with reinforced concrete sandwich walls, should always be preceded by a thorough assessment of their technical condition. This applies to the technical condition of the metal fittings (hooks, pins, rods) as well as to how they are connected and interact with the elements of the wall.

The insulation should be commenced with the installation of the starter tracks. They support the first row of thermal insulation boards, facilitate to maintain the uniform level of successive layers, strengthen the bottom edge of the system, and the bottom edge drip prevents water bleeding. The boards should be installed horizontally on the plinth of the building, not lower than 30 cm above the ground level, which provides protection from the effects of rising damp and protects against dirt - mud particles brought by raindrops reflected from the ground. Instead of skirting boards, it is permitted to use strips of armour mesh or two layers of fiberglass mesh.

The adhesive can be applied onto the panels with two methods: partly with the “strip - point” method or fully (lamella panels or facade wool panels, but only on respectively even substrates). In both cases, the surface of the panel should be floated with thin layer of adhesive mortar, pressed into the structure of wool by stripping using the edge of a steel trowel. This activity is designed to pre-moisten the wool fibers and improve adhesion. Then, in the case of partial application, apply the proper layer of adhesive in the form of continuous circumferential bead (3÷5 cm wide) at the edge of the panel and 6÷8 patches of 8÷12 cm in diameter evenly distributed on the whole surface. The adhesive mortar applied on panel should cover at least 40% of its surface. In the case of full adhesive application, the adhesive is applied onto the entire surface of the panel with the use of smooth float and then profiled with notched trowel (notch height of 8 - 12 mm). As the adhesive is applied on the underside of the panels, both facade or lamella, the panels should be applied onto the substrate, lightly moved and pressed. The subsequent panels rows should be positioned so that the vertical panel joints are staggered and overlapped. It is unacceptable to leave gaps between adjacent panels or adhesive residues in the joints. Control the plane with a level continuously. Pressing and correcting of panels position is allowed only with the use of wooden float with round edges.

In order to increase the system resistance against mechanical damage, to allow free drainage and execution of expansion joints - the finishing profiles should be installed on the fixed insulation layer. These profiles are installed at every specific locations of the façade (i.e. corners, reveals, sills, etc.). They can also be simultaneously installed during the base coat mesh embedding.

In all corners of window and door reveals, additional reinforcing mesh strips (rectangles with dimensions of 20 x 35 cm) embedded in the adhesive mortar AVAL KT 190 should be installed. The strips should be applied diagonally, at a 45° angle in relation to the line set by the edges of the reveals.

The additional fixing with the use of plastic mechanical fasteners with steel pins can commence after ca. 24 hours from the panels application. Detailed information about the number of fixings, their distribution, length and depth of anchorage should be specified in the thermal insulation technical design and meet the requirements of the fixings and mineral wool manufacturers. It is recommended to use 4 to 6 fixings per 1 m² (buildings up to 20 m high) and 6 to 10 (in buildings exceeding 20 m). The amount of fixings should be bigger in the wall corners and edge zones of width of about 1.5 m.

The base coat can be installed once the adhesive mortar used for panel application has sufficiently set and any necessary additional mechanical fixings have been installed (after three days on average). Apply the adhesive mortar onto the surface of the installed insulation panels and spread it using a notched trowel (notch size 10 - 12 mm). The adhesive should be spread in vertical strips of width slightly greater than the fiberglass mesh width. Then, starting from the top, subsequent strips of mesh are applied and in a few points along the entire length embedded in the prepared adhesive layer. The adjoining strips of mesh should overlap horizontally and vertically by a minimum coverage of 10 cm (15 cm in quoins). Mesh overlaps should not coincide with the joints between the insulation panels. When applied, the mesh should be carefully embed in the adhesive. In order to embed the mesh evenly, the adhesive is squeezed with the slightly inclined trowel led from the top, in the direction from the center to the mesh strip side. The correctly embedded mesh should be completely not visible under adhesive coat and should not be in direct contact with the mineral wool panels surface.

The outer layer of the system may be a thin-coat render solely or a thin-coat render coated with a façade paint. The execution of the finishing layer can start after ca. 3 days from the reinforced layer installation. You can use thin - coat render: AVAL KT 35 or AVAL KT 137 (mineral), AVAL KT 72 (silicate) or AVAL KT 74 (silicone). The renders surface can be painted optionally with AVAL KT 52, AVAL KT 48 or AVAL KT 46 façade paints. All works must be performed in accordance with the technology described in the technical data sheets of the individual products.