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Optima Casstte Rainscreen is a cost effective ventilated and drained, interlocking cassette cladding system, showing a 20 mm joint between panels.

System features:

  • Developed and manufactured in accordance with CWCT guidelines.
  • Does not support combustion.
  • Components meet the requirements of Class 0 fire performance in accordance with Building Regulations.
  • NHBC and LPCB accredited including a red book entry.

Support and fixing system:

A fully adjustable system of cleats and carrier profile offers a 'hands free' lining and levelling facility for cladding zones from 100–320 mm; consequently, small irregularities in the substructure are not significant, and a simple arrangement of preformed top hat sections or timber battens can be used. Isolation of the structural bracket and fixing reduces thermal transmittance to a negligible level. Panels are fixed using wafer head, self-tapping stainless steel screws through pre-punched holes.

Consult Sotech regarding structural restrictions, and constraints relating to panel size, fastener type and frequency of fixings.

General information
Specification data - Drained and back-ventilated rainscreen cladding systems
Product Reference

Optima® Cassette Rainscreen



Column casing

Coping system

Corner profile - external

Corner profile - internal

Fascia system including bull-nose

Head profile

Jamb profile

Window sill profile

Panels -


Aluminium composite (ACM)


Stainless steel

Lead clad steel

Weathered zinc



1.2 mm

1.5 mm

2 mm

3 mm

4 mm



Post fabrication coating by quality assured applicators to BS 3987

Polyester powder coated

Post fabrication coating by quality assured applicators to BS 6496

Precoated PVdf or polyester

PVDF 70/30, two coat system, to AAMA 605

PVDF 70/30, three coat system, to AAMA 605





Not applicable

Product Options

Panel material/ thickness/ finish:

  • Aluminium: 2 mm; precoated PVdf or polyester.
  • Aluminium: 2 and 3 mm; polyester powder coated (PPC) to BS 6496.
  • Aluminium: 2 and 3 mm; anodized (25 micrometre minimum) to BS 3987.
  • Aluminium: 2 and 3 mm; PVdf 70/30 two coat system (25 micrometre) to AAMA605.
  • Aluminium: 2 and 3 mm; PVdf 70/30 three coat system (40 micrometre) to AAMA605.
  • Aluminium composite material (ACM): 4 mm.
  • Copper: 1.5 mm; natural finish.
  • Lead clad steel: 2 mm; natural lead finish.
  • Stainless steel (rigidizied): 1.2 and 1.5 mm; natural, polished or patterned finish.
  • Weathered zinc: 1.5 mm, natural.
  • Zinc: 1.5 mm, natural.


Refer to Sotech for available anodized, PPC, polyester and PVdf colours.

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