CGL Wallplank is a rainscreen cladding system that uses a interlocking plank system of folded cassette panels secretly fixed into an extruded aluminium support structure, supported by helping hand brackets attached back to the primary structure. The rainscreen wall design shall include all components such as membranes and insulation that together will ensure compliance with current building regulations.

Wallplanks are formed from flat sheet to suit project specification. 1–1.5 mm wallplanks are 24 mm deep, 2 mm wallplanks are 30 mm deep and 3 mm wallplanks are 35 mm deep.

Wallplanks can be installed in horizontal or vertical format. Long panels can be made but CGL recommend that face dimensions do not exceed 3950 mm lengths (widths vary depending on material thickness). There will also be cases when width may be restricted due to project wind loadings and CGL will advise maximum width.

The system is a drained rear-ventilated rainscreen façade. Air pressure in the cavity behind the panels generally equalises with pressure outside to prevent wind-driven rain from entering the cavity. Any moisture which does enter the cavity, drains down the back of the panels and exits in a controlled fashion at horizontal or vertical joints and the base of the façade.

In order for the rainscreen principle to function, the backing wall from which it is supported must achieve certain standards of air permeability, stipulated in The Building Regulations, and be capable of accommodating transmitted live and dead loads. The backing wall must also achieve specified performance requirements for fire, acoustics, and condensation risk.

The system have been formally tested with certification from a UKAS accredited testing facility, which complies with testing requirements laid out in the CWCT publication, 'Standard for systemised building envelopes - 2005'.

Features and benefits:

Precision made to ISO manufacturing tolerances.
Variety of joint sizes available between 5mm and 30mm.
Available in a variety of thickness's up to 3mm.
All materials to have an A1 or A2-s1-d0 fire rating.
Suitable for large and bespoke sizes.
Reassessed or hairline appearance.
Can also be supplied perforated if required.
All season installation.
Easy maintenance.
Mechanical fixing methods with no use of flammable adhesives used.
Stiffeners/ carriers, if required are stud welded to rear of panel (subject to product design review).
Ventilated system.
Designed and tested using extruded Helping Hand UL approved brackets.
Fully adjustable support system provided. Suitable for zones between 100-412.
Prepunched holes available upon request.
Inclusive of thermal isolation pads
Site installation friendly, generally installed from top to bottom to assist with early scaffolding strike. (Bottom to top installation subject to site assessment).
Fire tested to BS EN 13501-1 certification.
Centre For Window & Cladding Technology Sequence B Dynamic Tested in accordance with NHBC testing requirements.
CCPI Product Verification (New Building Safety Act initiative).
System warranty available upon project completion.

With the exception of Cor-Ten Steel, a removable protective film is supplied on all panels and remains in place through the fabrication and installation processes to inhibit damage. CGL recommend the film be removed on the day of panel installation otherwise there is the risk that adhesive residue/ staining will remain on the panels after later removal.

CGL Schedule of Verified Products – Drained and back ventilated rainscreen system