Placement of a ventilated facade with granite

The construction of a ventilated granite façade requires a detailed definition of the different control stages necessary for achieving an optimal result.
The principle of the system for placing ventilated façades is based on fixing the stone plates to the substructure with stainless steel clips, constituted by profiles anchored to the supporting wall and/or the building structure through adjustable brackets.

The sequence of operations in the work must be as follows:
-Reconsideration: This will be done in accordance with the project plans. Measurements will be taken on the structural support of the façade in order to reconsider the supporting elements of the surrounding area and therefore assume the dimensional changes that may have occurred to the work.
-Placement of brackets: The brackets are fixed, by one of their sides, to the forging and work façade and, by the other, to the metal profile. These anchor the substructure of the ventilated façade system to the building structure and supporting wall.
-Placement of metal profiles: The vertical profiles will remain perfectly aligned and fixed to the brackets in such a way that they ensure a correct movement of the substructure, as well as a good planimetry. In the event of using horizontal profiles, these will be fixed to the vertical pillars to absorb any expansions or contractions that may occur to the pillars of the light façade. The minimum horizontal joint between the vertical pillars will be 2mm per linear metre of profile.
-Placement of thermal insulation: The thickness of insulation will be determined in the execution project, complying with the basic energy saving (DB-HE) and noise protection (DB-HR) documents from the CTE. Whenever applicable, the entire outer face of the supporting wall and resistant structure of the building (forging, pillars, etc.) will be covered in order to avoid thermal and acoustic bridges.
-Placement of the air chamber: The air chamber must have a width of at least 3cm and open joints of 120cm2 per each 10m2 of the area of the façade. On all singular points; lintels, forging, fire gating, etc.; the air chamber must have an appropriate drainage system.
-Attaching the mooring system to the support: The system for placing moorings can be adjustable into one, two or three axes, depending on the mobility that they can offer.
The system used to attach the stone elements to the metal profiles consists of stapling plates and clips on to the keyhole moorings, or bolt type moorings. Horizontal and vertical joints must also be placed between the pieces of stone. There are two types of joints between the mooring and plate, which are: Rod joints and pin joints.
-Execution of singular points: Bolts and holes, joints and rain guards are singular points, therefore an appropriate execution must be followed.
-The bolt moorings must have a minimum diameter of 4mm and be covered by a nylon cover or sleeve, or similar material, to prevent direct contact between the mooring and stone.
-The bolts must penetrate into the hole of the stone by at least 25mm. This length should in all cases leave a depth of 5mm.
-The diameter of the hole must be equal to the sum of the bolt’s diameter, plus two times the thickness of the sleeve, plus 2mm.