System

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Application substrate

  • The substrate must be stable and must not present any fissures or structural damage.
  • A profile anchorage system must be used when the substrate is not supported strongly enough.
  • Rainwater networks must be uninstalled prior to the application of the system.
  • Dirty, uneven or absorbent substrates first require preparation.
  • The substrate must be free of dust or moisture to help adherence of the panels.
  • In non-screeded supports, the surface to be covered must not have a flatness defect of more than 5mm/m.
  • In screeded supports, the surface to be covered must not have a flatness defect of more than 3mm/m.
  • The roughness of the substrate is enough to enhance adhesive properties.
  • The support must be stable and cured, free of shrinkage.
  • The imperfections and hollow spaces must be evened in order to achieve flatness.
  • The correct verticality of the parameters is measured by 15mm deviations per 3m of height.  
  • The perfect moisture prior to application is that at which the surfaces do not present glare or shiny areas by water saturation.
  • The system application temperature in the support must be over 5ºC.
  • In case the support is at temperatures over 30/35ºC, the recommendations in the technical application manual should be considered.

Perimeter starting anchor profile installation

 

  • The starting anchor profiles create a protection area against dampness, impacts, etc. Moreover they allow the installation starting line to be uniform and straight.
  • Starting profiles are arranged horizontally along the inferior limit of the area to be covered before the beginning of the insulation panel installation, leaving a socket to avoid moisture transmission by capillarity.
  • Zinc plated screws and proper attachment plugs are used, depending on the substrate.
  • The fixings are attached at a distance never over 30cm and never under 15cm for joints or vertexes.
  • The distance between anchor profiles must be at least of 2/3mm in order to prevent contact by expansion.
 

Application of FoamLime Adhesivo

Adhesive mortar preparation:

  • In order to obtain the adhesive mortar, it is only necessary to mix the product with water.
  • The mixture can be carried out manually or mechanically. For mechanical mixing a stirrer rod is recommended instead of a cement mixer due to the stickiness of the product. The stirrer rod must not go over 500rpm to avoid an excess of occluded air inside the adhesive.
  • The use of spraying mixers simplifies and streamlines the process.

Water and mixing time:

  • The prescribed dosing must be strictly followed and no other component should be added to the mixture.
  • Mixing or stirring time must not be under 5 minutes.
  • The resting time of the mixture before application should be observed; it will depend on whether the mixture is carried out manually or mechanically.
  • Pot life shall not exceed 30 minutes; it will depend on the weather conditions.

Mixture preparation:

  • Mix the powder product with a ratio of 6,75 L of water per 30Kg bag.
  • Knead until a homogeneous and doughy mass is achieved. 5 minutes minimum.
  • Let it rest for 5 minutes prior to application.

Cellular-glass panels bonding

Single bonding method:

  • Spread the adhesive over the support and comb it using a notched trowel type U9 (9mm slots).
  • Fix the panels by manual pressure with an offset pattern, thus obtaining a perfect juxtaposition for thermal bridge break and insulation continuity.

Observations:

  • During the bonding process, do not hit the cellular-glass panels so as to avoid breakage.
  • In case of gaps between panels, cut and complete with cellular glass in order to homogenise the insulation; never fill with adhesive mortar.

Mechanical fixation of the panels

 

  • A mechanical anchorage of the panels to the support is needed in addition to the FoamLime adhesive. Round-plate plastic plugs with a diameter larger than 50mm will be used and plastic material so as to avoid condensation that could produce stains on the final coating.
  • Depending on the substrate, the penetration of the plug shall be about 4cm.
  • The installation and placement of the anchoring points shall be decided depending on the project.
  • Mechanical anchors must be fitted once the panels have been bonded to the support.
  • In vertical joints, one mechanical anchor shall be fitted on each side of the panel.
  • In the final termination panels an extra anchor shall be fitted on the centre of the panel.
  • Mechanical anchorage must be fastened not hammered.
  • ETA anchors shall be used.
  • Hilti SD-FV or EJ0T STR-U anchor are recommended for thicknesses over 60mm.

Special-points resolution

A reinforcement of all special points of the facade is required because work-derived tensions are accumulated and transmitted to this zones and can later produce fissures in the covering.

Special-points description:

  • Lintels on openings or doors and windows.
  • Shutter boxes.
  • Wrought.
  • Changes in section of walls and enclosures.
  • Areas near elastic or expansion joints.
  • Pillar joints.

The installation of mesh is recommended in order to cover a minimum of 20cm each side of the joint. In angled holes of facades, extra strips of mesh shall be installed with a 45º slope using 20*20cm pieces.

Lintels and doorjambs: it is necessary to reinforce the lintels and doorjambs of holes in the facade with fibreglass mesh wrapping.

Doors and windows: it is necessary to observe the edges of door or window wells and discontinuities between materials for which special areas shall be reinforced with fibreglass-mesh angle beads, overlapping it over the plastering mesh. Besides, it is necessary to fit corner profile on all edges.

Eaves and copings: when the system encounters with eaves, cornices and copings, a 5mm elastic joint should be carried out to avoid movement transmission to the panels.

Corner guard fitting: corner guards must be protected using mesh-reinforced metallic profiles to provide resistance, verticality and uniformity when applying mortar. In order to  bind the corner guard, the necessary amount of FoamLime Adhesivo is applied first and then the mesh is embedded into the same adhesive.

Reinforcement mesh installation

Once the first FoamLime Adhesivo layer has been applied, we shall proceed with the installation of the fibreglass mesh, from top to bottom, embedding it uniformly.

The mesh must be embedded at the centre of the thickness of the FoamLime Adhesivo mortar for it to remain shallow which could leave it uncovered during the scraped finish step.

If it were necessary, apply a second layer of FoamLime Adhesivo mortar to cover the mesh perfectly and leave it centered inside the final thickness of this phase of the system.

Fibreglass-mesh installation:

  • In adjacent sections the mesh must be overlapped by 10cm minimum.
  • In edges without corner guards it must go around a minimum of 25cm and must not be cut over the edge.
  • Adjacent foils should be overlapped by a minimum of 10cm.

Objectives of the reinforcement mesh:

  • Improve the integrity of the system.
  • Absorb impact energy and expansion.
  • Decrease the risk of fissures and their propagation.
  • Increase the mechanical compression and tensile strength.

Advice for reinforcement-mesh choice:

  • The size mesh must be chosen according to the granulometry of the covering or rendering.
  • A mesh size of 12,5mm by 12,5mm is recommended for thick grain rendering because of its high tensile strength.
  • A mesh size of 4mm by 5mm is recommended for fine grain rendering.

Covering and evening of the reinforcement mesh

This second layer of FoamLime Adhesivo over the surface with the reinforcement mesh already embedded homogenises the application and ensures the mesh is perfectly centered inside the adhesive mortar.

The application can be carried out right away after the first layer—used to bind the reinforcement mesh—has been applied without waiting for this first layer to dry.

Once this phase is finished the surface is ready to receive FoamLime Base Mortar.

Structural-elements installation

Structural element installation among which we find:

  • Windows.
  • Window sills.
  • Gutters.
  • Copings.
  • Other.