imprimer
Blizzard® is a thin terracotta cladding (15 mm) available in small sizes (up to 592 mm long and 307 mm high) with horizontal overlapping joints for better weatherproofing. It is available in ten colours and three finishes (smooth, sanded, ridged).
CSTB Technical Approval no. 2/09-1354
| Produit | Dimensions | Trame de pose | Code produit | Quantité par m² | Poids unitaire | Poids par m² | Résistance au choc | Résistance au vent |
|---|---|---|---|---|---|---|---|---|
| Blizzard® | 207x592x15 | 200 x 600 | BL20CO | 8,3 | 4 | 33 | jusqu’à Q2** | 2380 Pa (V4) |
| Blizzard® | 207x492x15 | 200 x 500 | BL20CO | 10 | 3,3 | 33 | jusqu’à Q3** | - |
| Blizzard® | 257x592x15 | 250 x 600 | BL25CO | 6,7 | 5 | 33 | - | jusqu’à 2430 Pa (V4)** |
| Blizzard® | 257x492x15 | 250 x 500 | BL25CO | 8 | 4,2 | 33 | - | 2920 Pa (V4)** |
| Blizzard® | 307x592x15 | 300 x 600 | BL30CO | 5,6 | 6 | 33 | Jusqu’à Q2** | 1960 Pa (V3) |
H = Height, L = Length, Th = thickness * theroretical dimensions at close terracotta tolerances. ** maximum strength when installed correctly (see Technical Approval) > Resistance to earthquakes: may be used in zones 1a and 1b for class A, B and C buildings and in zone Ia for class D buildings. > Resistance to frost: Blizzard® products meet the NF EN ISO 539.2 frost resistance standard.
The cladding system based on single-wall terracotta components, overlapping horizontally, with longitudinal lugs on the rear face allowing them to be suspended on regularly spaced fittings by clipping onto a vertical framework, secured to the main structure with insulation installed behind the framework.
The vertical joints between adjacent products are fitted with flexible seals to provide protection against water.
There are various accessories not supplied by TERREAL (in italics in the diagrams): thermal insulation, fixing brackets, metal or PVC profiles for miscellaneous flashings and trims, miscellaneous screws and fixing anchors.
Blizzard® installations must conform to the requirements of CSTB Technical Approval no. 2/09-1354.
Fitting onto a concrete or masonry structure, covered with a vertical framework, must comply with the rules contained in CSTB specifications nos. 3194/3586 (metal framework, with design restrictions).
This framework is made up of special aluminum profiles, pre-punched or otherwise, fixed to standard fixing brackets.
The brackets are fitted before hand in a staggered pattern on either side of the profile. They must be laid out, following a technical survey that takes thermal and mechanical requirements into account (strength of the anchors, wind, and seismology).
The addition of intermediate vertical profiles may increase the impact resistance performance (up to class Q3).
Laid out along the vertical profiles, spaced at 20, 25 or 30 cm, clips are attached by clipping or screwing, depending on the option chosen. The terracotta products are then hooked on, working from the bottom upwards, suspended from the upper part and held at the bottom by lugs.
EPDM seals on the vertical profiles hold the products in the horizontal plane and stabilize the fixing of each product. The use of additional clips attached to the intermediate lugs on 25 and 30 cm Blizzard® components increase the processes wind resistance. Blizzard® may easily be cut vertically at critical points (minimum 12 cm) or horizontally (use intermediate lugs for fixing), using a diamond-tipped saw, lubricated with water.
 Diagram 1 : vertical cut, standard fit |  Diagram 2 : horizontal cut, standard fit |
 *theoretical dimensions at close tolerances for terracotta |
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| Set out the necessary spacing between the vertical profiles, depending on the size of product being used (maximum 60 cm), then rule horizontal and vertical lines as references. |
Along the vertical lines fit brackets at regular intervals, suitable for the depth of insulation being used. |
Fit the vertical profile brackets with their rubber seals, checking that they are vertical and correctly vertically spaced, then position the clips. |
Install non damp-absorbing insulation between the framework elements and the supporting wall, ensuring there is no over-thickness that could obstruct the ventilation air gap (2 cm minimum). |
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Position the Blizzard® products between the rubber seals and locate them on the clips using the lugs on the product. |
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Once the profiles are fixed, as for system no. 1, position the clips as desired (or using a template) and by drawing lines. Once the insulation is installed, the products may be positioned and located on the screw-in clips. |
*theoretical dimensions at close tolerances for terracotta |
A perforated metal rail is fi xed to the support beforehand, protecting the insulation while maintaining the ventilation of the air gap (ventilation holes to be sized according to the height of the cladding). The spacing between the fi rst two rows of standard clips is reduced by 50 mm in relation to the continuous run part, or by 50 or 100 mm where products have been cut horizontally, so that the bottom clips are concealed behind the product.
In the upper part the Blizzard® system must be protected by a water run-off arrangement, sealed to the support, covering the products and overhanging by at least 20 mm (ventilation holes to be sized according to the height of the cladding). The spacing between the last two rows of straight clips is reduced by 50 mm in relation to the continuous run, or 50 or 100 mm where products have been cut horizontally, so that the top clips support the product by its upper lug.
The treatment of Blizzard®/joinery junctions, usually done using metal trims (or possibly by Blizzard® in reveals), requires continuity of the insulation on the underside, preventing thermal bridges, and must comply with the usual recommendations for a ventilation air gap. The treatment of reveals requires the use of Blizzard® edge profi le, offset from the end of the product.
If the opening is actually fl ush to the bare wall, their aesthetic connection to the Blizzard® system is simple. The drainage and air gap ventilation recommendations must be complied with. The space taken up by the joinery’s peripheral sealing arrangements, particularly at the top, requires the use of overhanging profi les or Blizzard® products, allowed by the system.
Producing external angles in Blizzard® requires removal (disc cutting) of the lugs on a length corresponding to the depth of the other product forming the corner, the products being supported by edge profi les at their ends. Finishing external corners with metal profi les is also possible, as is a combination using a Maestral® corner, a system also covered by ‘Technical Approval’. Fitting internal corners is less specifi c and requires only preparation of the junction between the two adjacent grids and a vertical join of the same width (protected by a rubber seal or metal plate on the underside) similar to a continuous run.
