Criteria in respect of the selection of facade anchors:

 In Product aplications
fachada granito
Product aplications

Choosing the right system for laying granite onto a facade is not always an easy task. Below we outline a series of criteria to take into account when doing this.

Anchoring systems which are classified according to the method used for fixing to a support, might be:

  1. Anclajes de unión mecánica: La unión del anclaje al soporte se realiza generalmente a través de tacos de expansión. This type of fastening is ideal for sturdy supports and has the advantage of loading right away. It usually offers better resistance to heat and fire.
  1. Chemical bonding anchors: Their actions against dynamic loads are usually superior to mechanical fasteners. Here we are speaking about fixations by mortar or fixations by adhesives (mortars containing resins).
  1. Fixation to profile is achieved through an auxiliary structure of vertical and / or horizontal profiles. The advantage of this system is that stresses are transmitted through the edges of the slabs.

The choice of the anchorage system should take into account aspects such as the following:

  1. Adequacy of the anchorage to the stone cladding: The safety of the anchor system against peeling is a key function, among other things, of the anchor/stone contact surface, therefore a supporting pin will be of lesser guarantee than one above a groove and, to a greater extent, than a continuous groove. As for bolts or pin anchors, the bad practice, more often than not accepted, of drilling the stone on site rather than in the workshop should be avoided.
  2. Adaptation of the anchorage to the support: It is recommended for use of point anchors that the support be made of perforated brick or concrete. When the support is perforated brickwork or concrete block, uniformity of the mechanical behaviour of the anchor points is reduced, so in these cases, it is more advisable to use filler blocks.
  3. Actions to which the facade can be subjected: Particular consideration should be given to the aggressiveness of the environment, the conditions of the facade (whether exposed or not), the height of the area, the particular characteristics of the area (climate, bending stress due to wind, etc.)
  4. Incompatibility between different constituent materials:                                                                                                                    Account and avoided by means of adequate protection measures:
    4.1. Galvanistic electroplating may be generated through contact between metals of a different nature such as aluminum and stainless steel in environments of high aggressiveness, or mortars connecting the support to the components of the anchorage.
    4.2. The risk brought in transporting salts from the support to the coating.
    4.3. Incompatibilities of sealants of any nature, such as certain silicones.
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